RHEF450

FUSE, PTC RESET, 16V, 4.5A, RADIAL

⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
Manufacturer: LITTELFUSE
Product type: Radial Leaded PPTCs
Product Range:PolySwitch RHEF Series; Voltage Rating:16VDC; Holding Current:4.5A; Trip Current:7.8A; Time to Trip:3s; Fuse Shape:Rectangular; Current Rating Max:100 04H7876
Delivery and price
Units per pack	2500
Price	0.333 €
Current stock	10+
Lead time	30 days
Datasheet
## **POLYSWITCH RESETTABLE DEVICES** Radial-Leaded Devices 

Littelfuse’s PolySwitch radial-leaded products represent the most comprehensive and complete set of PPTC products available in the industry today. 

- RGEF series for hold currents up to 14A 

- RHEF series for flatter thermal derating and operating temperatures up to 125°C 

- RUEF series for balance of voltage rating (30V) and hold current (up to 9A) 

- RUSBF series for fast time-to-trip and low-resistance computer applications 

- RXEF series for low hold currents (down to 50mA) and high voltage rating (up to 72V) 

- RKEF series for balance of voltage rating (60V) and hold current (up to 5A) 

- Now offering halogen free versions of all products 

## **BENEFITS** 

- Many product choices help provide engineers more design flexibility 

- Compatible with high-volume electronics assembly 

- Assists in meeting regulatory requirements 

- Higher voltage ratings allow use in new applications 

## **APPLICATIONS** 

- Satellite video receivers 

- Industrial controls 

- Transformers 

- Modems 

- CD-ROMs 

- Game machines 

## **FEATURES** 

- RoHS compliant 

- Halogen free 

- (refers to: Br _[≥]_ 900ppm, Cl _[≥]_ 900ppm, Br+Cl _[≥]_ 1500ppm) 

- Broadest range of radial-leaded resettable devices available in the industry 

- Current ratings from 50mA to 15A 

- Voltage ratings from 6V (computer and electronic applications) to 72V 

- Agency recognition : UL, CSA, TÜV, CQC** 

- Fast time-to-trip 

   - Phones 

   - Fax machines 

   - Analog and digital line cards 

   - Printers 

   - Intelligent appliance 

   - Robotic machine 

   - Power supply 

   - Security 

   - Lighting 

   - Medical application 

- Low resistance 

**CQC only applies to RXEF, RUEF family parts 

Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

CO **HF** Halogen Free 

RoHS Compliant, ELV Compliant 

**PolySwitch Resettable Devices** Radial-Leaded Devices 

## Application Selection Guide 

The guide below lists PolySwitch radial-leaded devices that are typically used in each of the applications described. Specifications for the suggested device part numbers can be found in this section. 

Once a part number has been selected, the user should evaluate and test each product for its intended application. 

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**----- Start of picture text -----**<br>
PolySwitch Resettable Devices — Key Selection Criteria<br>Protection Application<br>Small Size Flatter Derating Lower Current Higher Voltage<br>**----- End of picture text -----**<br>


|Electromagnetic Loads|RGEF (<16V), RUEF (<30V)|RHEF (<16V)|RXEF (<72V), RKEF (<60V)|
|---|---|---|---|
|Halogen Lighting|RGEF (<16V), RUEF (<30V)|RHEF (<16V)|RXEF (<72V), RKEF (<60V)|
|LightingBallast|RXEF (<72V)|||
|Loudspeakers|RXEF (<72V)||RXEF (<72V), RKEF (<60V)|
|Medical Equipment|RGEF (<16V), RUEF (<30V)|RHEF (<16V)|RXEF (<72V), RKEF (<60V)|
|MOSFET Devices|RGEF (<16V), RUEF (<30V)|RHEF (<16V)|RXEF (<72V), RKEF (<60V)|
|Motors, Fans and Blowers|RXEF (<72V), RGEF (<16V)|RHEF (<16V)||
|POS Equipment|RXEF (<72V), RUEF (<30V)|||
|Process and Industrial Controls|RXEF (<72V), RUEF (<30V)|||
|Satellite Video Receivers|RGEF (<16V), RUEF (<30V)|RHEF (<16V)|RXEF (<72V), RKEF (<60V)|
|Securityand Fire Alarm Systems|RGEF (<16V), RUEF (<30V)|RHEF (<16V)|RXEF (<72V), RKEF (<60V)|
|Test and Measurement Equipment|RGEF (<16V), RUEF (<30V)|RHEF (<16V)|RXEF (<72V), RKEF (<60V)|
|Transformers|RGEF (<16V), RUEF (<30V)|RHEF (<16V)|RXEF (<72V), RKEF (<60V)|
|DDC Computer and Consumer Electronics|RUEF (<30V)|||
|Mouse and Keyboard|RUEF (<30V)|||
|SCSI|RUEF (<30V)|||
|USB|RUSBF (<16V)|||
|Traces and Printed Circuit Board Protection|RGEF (<16V), RUEF (<30V)|RHEF (<16V)|RXEF (<72V), RKEF (<60V)|



**Note :** This list is not exhaustive. Littelfuse welcomes customer input for additional application ideas for PolySwitch resettable devices. 

## Table R1 — Product Series - Current Rating, Voltage Rating/Typical Resistance 

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**----- Start of picture text -----**<br>
RXEF RKEF RXEF RUEF RGEF RHEF RHEF RUSBF RUSBF<br>Voltage Rating 72V 60V 60V 30V 16V 16V 30V 16V 6V<br>**----- End of picture text -----**<br>


|**Hold Current (A)**||||||||||
|---|---|---|---|---|---|---|---|---|---|
|0.050|—|—|9.20Ω|—|—|—|—|—|—|
|0.100|—|—|3.50Ω|—|—|—|—|—|—|
|0.170|—|—|4.30Ω|—|—|—|—|—|—|
|0.200|2.290Ω|—|—|—|—|—|—|—|—|
|0.250|1.600Ω|—|—|—|—|—|—|—|—|
|0.300|1.110Ω|—|—|—|—|—|—|—|—|
|0.400|0.710Ω|—|—|—|—|—|—|—|—|
|0.500|0.640Ω|0.425Ω|—|—|—|—|0.68Ω|—|—|
|0.550|—|—|—|—|—|—|—|—|—|
|0.650|0.400Ω|0.350Ω|—|—|—|—|—|—|—|
|0.700|—|—|—|—|—|—|0.42Ω|—|—|
|0.750|0.325Ω|0.295Ω|—|—|—|—|—|—|0.140Ω|
|0.900|0.255Ω|0.255Ω|—|0.095Ω|—|—|—|0.100Ω|—|
|1.000|—|—|—|—|—|—|0.24Ω|—|—|
|1.100|0.200Ω|0.225Ω|—|0.075Ω|—|—|—|0.075Ω|—|
|1.200|—|—|—|—|—|—|—|—|0.080Ω|
|1.350|0.155Ω|0.165Ω|—|0.060Ω|—|—|—|0.060Ω|—|
|1.550|—|—|—|—|—|—|—|—|0.058Ω|
|1.600|0.115Ω|0.150Ω|—|0.050Ω|—|—|—|0.050Ω|—|
|1.850|0.100Ω|0.106Ω|—|0.045Ω|—|—|—|0.045Ω|—|
|1.900|—|—|—|—|—|—|—|—|—|



Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

**HF** Halogen Free RoHS Compliant, ELV Compliant 

## **PolySwitch Resettable Devices** Radial-Leaded Devices 

Table R1 — Product Series - Current Rating, Voltage Rating/Typical Resistance       (Cont’d) 

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**----- Start of picture text -----**<br>
RXEF RKEF RXEF RUEF RGEF RHEF RHEF RUSBF RUSBF<br>Voltage Rating 72V 60V 60V 30V 16V 16V 30V 16V 6V<br>**----- End of picture text -----**<br>


|**Hold Current (A)**||||||||||
|---|---|---|---|---|---|---|---|---|---|
|2.000|—|—|—|—|—|0.0610Ω|—|—|—|
|2.500|0.065Ω|0.063Ω|—|0.030Ω|0.0380Ω|—|—|0.030Ω|—|
|3.000|0.050Ω|0.040Ω|—|0.035Ω|0.0514Ω|0.0430Ω|—|—|—|
|3.750|0.040Ω|0.029Ω|—|—|—|—|—|—|—|
|4.000|—|0.026Ω|—|0.020Ω|0.0300Ω|0.0320Ω|—|—|—|
|4.500|—|—|—|—|—|0.0290Ω|—|—|—|
|5.000|—|0.021Ω|—|0.020Ω|0.0192Ω|—|—|—|—|
|5.500|—|—|—|—|—|0.0200Ω|—|—|—|
|6.000|—|—|—|0.013Ω|0.0145Ω|0.0175Ω|—|—|—|
|6.500|—|—|—|—|—|0.0144Ω|—|—|—|
|7.000|—|—|—|0.013Ω|0.0105Ω|0.0132Ω|—|—|—|
|7.500|—|—|—|—|—|0.0120Ω|—|—|—|
|8.000|—|—|—|0.013Ω|0.0086Ω|0.0110Ω|—|—|—|
|9.000|—|—|—|0.008Ω|0.0070Ω|0.0100Ω|—|—|—|
|10.00|—|—|—|—|0.0056Ω|0.0083Ω|—|—|—|
|11.00|—|—|—|—|0.0050Ω|0.0073Ω|—|—|—|
|12.00|—|—|—|—|0.0046Ω|—|—|—|—|
|13.00|—|—|—|—|—|0.0055Ω|—|—|—|
|14.00|—|—|—|—|0.0040Ω|0.0050Ω|—|—|—|
|15.00|—|—|—|—|—|0.0050Ω|—|—|—|



## Table R2 — Thermal Derating [Hold Current (A) at Ambient Temperature (°C)] 

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Maximum Ambient Temperature<br>Part<br>Number -40°C  -20°C  0°C  20°C   25°C  40°C 50°C 60°C 70°C 85°C 125°C<br>RXEF<br>60V<br>RXEF005 0.078 0.068 0.06 0.05 0.048 0.04 0.035 0.032 0.027 0.02 —<br>RXEF010 0.160 0.140 0.11 0.10 0.096 0.08 0.072 0.067 0.050 0.04 —<br>RXEF017 0.260 0.230 0.21 0.17 0.160 0.14 0.120 0.110 0.090 0.07 —<br>RXEF<br>72V<br>RXEF020 0.31 0.27 0.24 0.20 0.19 0.16 0.14 0.13 0.11 0.08 —<br>RXEF025 0.39 0.34 0.30 0.25 0.24 0.20 0.18 0.16 0.14 0.10 —<br>RXEF030 0.47 0.41 0.36 0.30 0.29 0.24 0.22 0.20 0.16 0.12 —<br>RXEF040 0.62 0.54 0.48 0.40 0.38 0.32 0.29 0.25 0.22 0.16 —<br>RXEF050 0.78 0.68 0.60 0.50 0.48 0.41 0.36 0.32 0.27 0.20 —<br>RXEF065 1.01 0.88 0.77 0.65 0.62 0.53 0.47 0.41 0.35 0.26 —<br>RXEF075 1.16 1.02 0.89 0.75 0.72 0.61 0.54 0.47 0.41 0.30 —<br>RXEF090 1.40 1.22 1.07 0.90 0.86 0.73 0.65 0.57 0.49 0.36 —<br>RXEF110 1.71 1.50 1.31 1.10 1.06 0.89 0.79 0.69 0.59 0.44 —<br>RXEF135 2.09 1.84 1.61 1.35 1.30 1.09 0.97 0.85 0.73 0.54 —<br>RXEF160 2.48 2.18 1.90 1.60 1.54 1.30 1.15 1.01 0.86 0.64 —<br>RXEF185 2.87 2.52 2.20 1.85 1.78 1.50 1.33 1.17 1.00 0.74 —<br>RXEF250 3.88 3.40 2.98 2.50 2.40 2.03 1.80 1.58 1.35 1.00 —<br>RXEF300 4.65 4.08 3.57 3.00 2.88 2.43 2.16 1.89 1.62 1.20 —<br>RXEF375 5.81 5.10 4.46 3.75 3.60 3.04 2.70 2.36 2.03 1.50 —<br>**----- End of picture text -----**<br>


Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

> RoHS Compliant, ELV Compliant **HF** Halogen Free 

## **PolySwitch Resettable Devices** Radial-Leaded Devices 

Table R2 — Thermal Derating [Hold Current (A) at Ambient Temperature (°C)][(Cont’d)] 

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**----- Start of picture text -----**<br>
Maximum Ambient Temperature<br>Part<br>Number -40°C  -20°C  0°C  20°C   25°C  40°C 50°C 60°C 70°C 85°C 125°C<br>RKEF<br>60V<br>RKEF050 0.73  0.65  0.58  0.50  0.48  0.42  0.38  0.34  0.31  0.26  —<br>RKEF065 0.94  0.85  0.75  0.65  0.63  0.54  0.50  0.44  0.40  0.34  —<br>RKEF075 1.09  0.98  0.86  0.75  0.73  0.62  0.58  0.51  0.46  0.39  —<br>RKEF090 1.30  1.17  1.04  0.90  0.87  0.75  0.69  0.61  0.55  0.47  —<br>RKEF110 1.60  1.43  1.27  1.10  1.06  0.92  0.85  0.75  0.67  0.57  —<br>RKEF135 1.96  1.76  1.55  1.35  1.31  1.12  1.04  0.92  0.83  0.71  —<br>RKEF160 2.32  2.08  1.84  1.60  1.55  1.33  1.23  1.08  0.98  0.83  —<br>RKEF185 2.68  2.41  2.13  1.85  1.79  1.54  1.43  1.26  1.13  0.96  —<br>RKEF250 3.63  3.25  2.88  2.50  2.43  2.08  1.93  1.70  1.52  1.31  —<br>RKEF300 4.35  3.90  3.45  3.00  2.91  2.50  2.30  2.04  1.84  1.55  —<br>RKEF375 5.44  4.88  4.31  3.75  3.64  3.11  2.90  2.54  2.29  1.94  —<br>RKEF400 5.80  5.20  4.60  4.00  3.88  3.32  3.08  2.73  2.45  2.08  —<br>RKEF500 7.25  6.50  5.75  5.00  4.85  4.15  3.85  3.41  3.06  2.59  —<br>RUEF<br>30V<br>RUEF090 1.31 1.17 1.04 0.90 0.87 0.75 0.69 0.61 0.55 0.47 —<br>RUEF110 1.60 1.43 1.27 1.10 1.07 0.91 0.85 0.75 0.67 0.57 —<br>RUEF135 1.96 1.76 1.55 1.35 1.31 1.12 1.04 0.92 0.82 0.70 —<br>RUEF160 2.32 2.08 1.84 1.60 1.55 1.33 1.23 1.09 0.98 0.83 —<br>RUEF185 2.68 2.41 2.13 1.85 1.79 1.54 1.42 1.26 1.13 0.96 —<br>RUEF250 3.63 3.25 2.88 2.50 2.43 2.08 1.93 1.70 1.53 1.30 —<br>RUEF300 4.35 3.90 3.45 3.00 2.91 2.49 2.31 2.04 1.83 1.56 —<br>RUEF400 5.80 5.20 4.60 4.00 3.88 3.32 3.08 2.72 2.44 2.08 —<br>RUEF500 7.25 6.50 5.75 5.00 4.85 4.15 3.85 3.40 3.05 2.60 —<br>RUEF600 8.70 7.80 6.90 6.00 5.82 4.98 4.62 4.08 3.66 3.12 —<br>RUEF700 10.15 9.10 8.05 7.00 6.79 5.81 5.39 4.76 4.27 3.64 —<br>RUEF800 11.60 10.40 9.20 8.00 7.76 6.64 6.16 5.44 4.88 4.16 —<br>RUEF900 13.05 11.70 10.35 9.00 8.73 7.47 6.93 6.12 5.49 4.68 —<br>RHEF<br>30V - High Temperature<br>RHEF050 0.68 0.62 0.56 0.51 0.50 0.44 0.40 0.36 0.34 0.28 0.12<br>RHEF070 0.95 0.87 0.79 0.72 0.70 0.62 0.56 0.51 0.47 0.39 0.17<br>RHEF100 1.36 1.24 1.13 1.03 1.00 0.89 0.80 0.73 0.67 0.56 0.24<br>RUSBF<br>16V<br>RUSBF090 1.31 1.17 1.04 0.90 0.87 0.75 0.69 0.61 0.55 0.47 —<br>RUSBF110 1.60 1.43 1.27 1.10 1.07 1.00 0.92 0.75 0.67 0.57 —<br>RUSBF135 1.96 1.76 1.55 1.35 1.31 1.12 1.04 0.92 0.82 0.70 —<br>RUSBF160 2.32 2.08 1.84 1.60 1.55 1.33 1.23 1.09 0.98 0.83 —<br>RUSBF185 2.68 2.41 2.13 1.85 1.79 1.54 1.42 1.26 1.13 0.96 —<br>RUSBF250 3.63 3.25 2.88 2.50 2.43 2.08 1.93 1.70 1.53 1.30 —<br>RGEF<br>16V<br>RGEF250 3.7 3.3 3.0 2.6 2.50 2.2 2.0 1.8 1.6 1.2 —<br>RGEF300 4.4 4.0 3.6 3.1 3.00 2.6 2.4 2.1 1.9 1.4 —<br>RGEF400 5.9 5.3 4.8 4.1 4.00 3.5 3.2 2.8 2.5 1.9 —<br>RGEF500 7.3 6.6 6.0 5.2 5.00 4.4 4.0 3.6 3.1 2.4 —<br>RGEF600 8.8 8.0 7.2 6.2 6.00 5.2 4.8 4.2 3.8 2.8 —<br>RGEF700 10.3 9.3 8.4 7.3 7.00 6.2 5.6 5.0 4.4 3.3 —<br>RGEF800 11.7 10.7 9.6 8.3 8.00 6.9 6.4 5.6 5.1 3.7 —<br>**----- End of picture text -----**<br>


Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

RoHS Compliant, ELV Compliant 

**HF** Halogen Free 

**PolySwitch Resettable Devices** Radial-Leaded Devices 

Table R2 — Thermal Derating [Hold Current (A) at Ambient Temperature (°C)][(Cont’d)] 

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**----- Start of picture text -----**<br>
Maximum Ambient Temperature<br>Part<br>Number -40°C  -20°C  0°C  20°C   25°C  40°C 50°C 60°C 70°C 85°C 125°C<br>RGEF<br>16V<br>RGEF900 13.2 11.9 10.7 9.4 9.00 7.9 7.2 6.4 5.6 4.2 —<br>RGEF1000 14.7 13.3 12.0 10.3 10.00 8.7 8.0 7.0 6.3 4.7 —<br>RGEF1100 16.1 14.6 13.1 11.5 11.00 9.7 8.8 7.8 6.9 5.2 —<br>RGEF1200 17.6 16.0 14.4 12.4 12.00 10.4 9.6 8.4 7.6 5.6 —<br>RGEF1400 20.5 18.7 16.8 14.5 14.00 12.1 11.2 9.8 8.9 6.5 —<br>RHEF<br>16V - High Temperature<br>RHEF200 2.71 2.49 2.26 2.06 2.00 1.77 1.60 1.46 1.34 1.11 0.49<br>RHEF300 4.07 3.74 3.41 3.09 3.00 2.65 2.40 2.21 2.00 1.66 0.74<br>RHEF400 5.57 5.11 4.65 4.22 4.00 3.62 3.29 3.01 2.73 2.27 1.01<br>RHEF450 6.10 5.60 5.10 4.60 4.50 4.00 3.60 3.30 3.00 2.50 1.10<br>RHEF550 7.47 6.86 6.24 5.66 5.50 4.85 4.41 4.04 3.66 3.05 1.36<br>RHEF600 8.20 7.50 6.80 6.20 6.00 5.30 4.90 4.40 4.00 3.30 1.50<br>RHEF650 8.80 8.10 7.40 6.70 6.50 5.70 5.30 4.80 4.30 3.60 1.60<br>RHEF700 9.51 8.73 7.95 7.20 7.00 6.17 5.61 5.15 4.66 3.88 1.73<br>RHEF750 10.20 9.40 8.60 7.70 7.50 6.60 6.10 5.60 5.00 4.10 1.90<br>RHEF800 10.87 9.98 9.08 8.23 8.00 7.06 6.41 5.88 5.33 4.43 1.97<br>RHEF900 12.21 11.19 10.16 9.26 9.00 7.97 7.20 6.56 6.04 5.01 2.19<br>RHEF1000 13.60 12.50 11.40 10.30 10.00 8.80 8.10 7.40 6.60 5.50 2.50<br>RHEF1100 14.94 13.72 12.49 11.31 11.00 9.70 8.82 8.09 7.32 6.09 2.71<br>RHEF1300 17.70 16.30 14.80 13.40 13.00 11.40 10.50 9.60 8.60 7.20 3.30<br>RHEF1400 19.01 17.46 15.89 14.40 14.00 12.35 11.22 10.29 9.32 7.76 3.45<br>RHEF1500 20.40 18.80 17.10 15.50 15.00 13.20 12.10 11.10 9.90 8.30 3.80<br>RUSBF<br>6V<br>RUSBF075 1.05 0.95 0.85 0.75 0.73 0.65 0.60 0.55 0.50 0.43 —<br>RUSBF120 1.69 1.52 1.36 1.20 1.16 1.04 0.96 0.88 0.80 0.68 —<br>RUSBF155 2.17 1.96 1.75 1.55 1.50 1.34 1.24 1.14 1.03 0.88 —<br>**----- End of picture text -----**<br>


## Figures R1-R5 — Thermal Derating Curve 

## **RXEF** 

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**----- Start of picture text -----**<br>
Figure R1<br>200<br>150<br>100<br>50<br>0<br>-40 -20 0 20 40 60 80<br>Ambient Temperature (˚C)<br>% of Rated Hold and Trip Current<br>**----- End of picture text -----**<br>


Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

RoHS Compliant, ELV Compliant 

**HF** Halogen Free 

**PolySwitch Resettable Devices** Radial-Leaded Devices 

## Figures R1-R5 — Thermal Derating Curve 

(Cont’d) 

## **RKEF** 

**==> picture [341 x 205] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure R2<br>200<br>150<br>100<br>50<br>0<br>-40 -20 0 20 40 60 80<br>Ambient Temperature (˚C)<br>% of Rated Hold and Trip Current<br>**----- End of picture text -----**<br>


- **A = RUSBF075, RUSBF120, RUSBF155** 

- **B = RUEF,** 

   - **and all other RUSBF** 

**RHEF** 

## **Figure R3** 

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**----- Start of picture text -----**<br>
200<br>150 B<br>A<br>100<br>A<br>50<br>B<br>0<br>-40 -20 0 20 40 60 80<br>Ambient Temperature (˚C)<br>Figure R4<br>200<br>150<br>100<br>50<br>0<br>-40 -20 0 20 40 60 80 100 120<br>Ambient Temperature (˚C)<br>% of Rated Hold and Trip Current<br>% of Rated Hold and Trip Current<br>**----- End of picture text -----**<br>


Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

**HF** Halogen Free RoHS Compliant, ELV Compliant 

**PolySwitch Resettable Devices** Radial-Leaded Devices 

## Figures R1-R5 — Thermal Derating Curve 

(Cont’d) 

## **RGEF** 

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**----- Start of picture text -----**<br>
Figure R5<br>200<br>150<br>100<br>50<br>0<br>-40 -20 0 20 40 60 80<br>Ambient Temperature (˚C)<br>% of Rated Hold and Trip Current<br>**----- End of picture text -----**<br>


## Table R3 — Electrical Characteristics 

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**----- Start of picture text -----**<br>
Part IH IT VMAX IMAX PD Typ Max Time-to-trip RMIN RMAX R1MAX Lead Size<br>Number (A) (A) (VDC)  (VAC RMS) (DCADC) (ACARMS) (W) (A) (s) ( Ω ) ( Ω ) ( Ω ) [mm [2]  (AWG)]<br>**----- End of picture text -----**<br>


|**RXEF**|||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|**60V**|||||||||||||||
|RXEF005|0.05|0.10|60|—|40|—|0.22|0.25|5.0|7.3|11.10|20.00|[0.128mm2|(26)]|
|RXEF010|0.10|0.20|60|—|40|—|0.38|0.50|4.0|2.5|4.50|7.50|[0.205mm2|(24)]|
|RXEF017|0.17|0.34|60|—|40|—|0.48|0.85|3.0|3.3|5.21|8.00|[0.205mm2|(24)]|
|**RXEF**|||||||||||||||
|**72V**|||||||||||||||
|RXEF020|0.20|0.40|72|72|40|40|0.41|1.00|2.2|1.83|2.75|4.40|[0.205mm2|(24)]|
|RXEF025|0.25|0.50|72|72|40|40|0.45|1.25|2.5|1.25|1.95|3.00|[0.205mm2|(24)]|
|RXEF030|0.30|0.60|72|72|40|40|0.49|1.50|3.0|0.88|1.33|2.10|[0.205mm2|(24)]|
|RXEF040|0.40|0.80|72|72|40|40|0.56|2.00|3.8|0.55|0.86|1.29|[0.205mm2|(24)]|
|RXEF050|0.50|1.00|72|72|40|40|0.77|2.50|4.0|0.50|0.77|1.17|[0.205mm2|(24)]|
|RXEF065|0.65|1.30|72|72|40|40|0.88|3.25|5.3|0.31|0.48|0.72|[0.205mm2|(24)]|
|RXEF075|0.75|1.50|72|72|40|40|0.92|3.75|6.3|0.25|0.40|0.60|[0.205mm2|(24)]|
|RXEF090|0.90|1.80|72|72|40|40|0.99|4.50|7.2|0.20|0.31|0.47|[0.205mm2|(24)]|
|RXEF110|1.10|2.20|72|72|40|40|1.50|5.50|8.2|0.15|0.25|0.38|[0.520mm2|(20)]|
|RXEF135|1.35|2.70|72|72|40|40|1.70|6.75|9.6|0.12|0.19|0.30|[0.520mm2|(20)]|
|RXEF160|1.60|3.20|72|72|40|40|1.90|8.00|11.4|0.09|0.14|0.22|[0.520mm2|(20)]|
|RXEF185|1.85|3.70|72|72|40|40|2.10|9.25|12.6|0.08|0.12|0.19|[0.520mm2|(20)]|
|RXEF250|2.50|5.00|72|72|40|40|2.50|12.50|15.6|0.05|0.08|0.13|[0.520mm2|(20)]|
|RXEF300|3.00|6.00|72|72|40|40|2.80|15.00|19.8|0.04|0.06|0.10|[0.520mm2|(20)]|
|RXEF375|3.75|7.50|72|72|40|40|3.20|18.75|24.0|0.03|0.05|0.08|[0.520mm2|(20)]|



Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

RoHS Compliant, ELV Compliant 

**HF** Halogen Free 

## **PolySwitch Resettable Devices** Radial-Leaded Devices 

## Table R3 — Electrical Characteristics[(Cont’d)] 

**==> picture [528 x 29] intentionally omitted <==**

**----- Start of picture text -----**<br>
Part IH IT VMAX IMAX PD Typ Max Time-to-trip RMIN RMAX R1MAX Lead Size<br>Number (A) (A) (VDC)  (VAC RMS) (DCADC) (ACARMS) (W) (A) (s) ( Ω ) ( Ω ) ( Ω ) [mm [2]  (AWG)]<br>**----- End of picture text -----**<br>


|**RKEF**||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|**60V**||||||||||||||
|RKEF050|0.50|1.00|60|—|40|—|1.00|8.00|0.8|0.320|0.529|0.900|[0.205mm2(24)]|
|RKEF065|0.65|1.30|60|—|40|—|1.25|8.00|1.0|0.250|0.450|0.720|[0.205mm2(24)]|
|RKEF075|0.75|1.50|60|—|40|—|1.40|8.00|1.5|0.200|0.390|0.640|[0.205mm2(24)]|
|RKEF090|0.90|1.80|60|—|40|—|1.50|8.00|2.0|0.190|0.320|0.520|[0.205mm2(24)]|
|RKEF110|1.10|2.20|60|—|40|—|2.20|8.00|3.0|0.170|0.280|0.470|[0.520mm2(20)]|
|RKEF135|1.35|2.70|60|—|40|—|2.30|8.00|4.5|0.110|0.220|0.370|[0.520mm2(20)]|
|RKEF160|1.60|3.20|60|—|40|—|2.40|8.20|9.0|0.100|0.200|0.320|[0.520mm2(20)]|
|RKEF185|1.85|3.70|60|—|40|—|2.60|9.25|12.6|0.060|0.152|0.250|[0.520mm2(20)]|
|RKEF250|2.50|5.00|60|—|40|—|2.80|12.50|15.6|0.040|0.085|0.140|[0.520mm2(20)]|
|RKEF300|3.00|6.00|60|—|40|—|3.20|15.00|19.8|0.030|0.050|0.080|[0.520mm2(20)]|
|RKEF375|3.75|7.50|60|—|40|—|3.40|18.75|22.0|0.017|0.040|0.060|[0.520mm2(20)]|
|RKEF400|4.00|8.00|60|—|40|—|3.70|20.00|24.0|0.014|0.038|0.060|[0.520mm2(20)]|
|RKEF500|5.00|10.00|60|—|40|—|5.00|25.00|28.0|0.012|0.030|0.050|[0.520mm2(20)]|
|**RUEF**||||||||||||||
|**30V**||||||||||||||
|RUEF090|0.90|1.80|30|30|100|70|0.60|4.50|5.9|0.070|0.120|0.22|[0.205mm2(24)]|
|RUEF110|1.10|2.20|30|30|100|70|0.70|5.50|6.6|0.070|0.100|0.17|[0.205mm2(24)]|
|RUEF135|1.35|2.70|30|30|100|70|0.80|6.75|7.3|0.040|0.080|0.13|[0.205mm2(24)]|
|RUEF160|1.60|3.20|30|30|100|70|0.90|8.00|8.0|0.030|0.070|0.11|[0.205mm2(24)]|
|RUEF185|1.85|3.70|30|30|100|70|1.00|9.25|8.7|0.030|0.060|0.09|[0.205mm2(24)]|
|RUEF250|2.50|5.00|30|30|100|70|1.20|12.50|10.3|0.020|0.040|0.07|[0.205mm2(24)]|
|RUEF300|3.00|6.00|30|30|100|70|2.00|15.00|10.8|0.020|0.050|0.08|[0.520mm2(20)]|
|RUEF400|4.00|8.00|30|30|100|70|2.50|20.00|12.7|0.010|0.030|0.05|[0.520mm2(20)]|
|RUEF500|5.00|10.00|30|30|100|70|3.00|25.00|14.5|0.010|0.030|0.05|[0.520mm2(20)]|
|RUEF600|6.00|12.00|30|30|100|70|3.50|30.00|16.0|0.005|0.020|0.04|[0.520mm2(20)]|
|RUEF700|7.00|14.00|30|30|100|70|3.80|35.00|17.5|0.005|0.020|0.03|[0.520mm2(20)]|
|RUEF800|8.00|16.00|30|30|100|70|4.00|40.00|18.8|0.005|0.013|0.02|[0.520mm2(20)]|
|RUEF900|9.00|18.00|30|30|100|70|4.20|45.00|20.0|0.005|0.010|0.02|[0.520mm2(20)]|
|**RHEF***||||||||||||||
|**30V - High **|**Temperature**|||||||||||||
|RHEF050|0.5|0.9|30|—|40|—|0.9|2.5|2.5|0.480|0.780|1.10|[0.205mm2(24)]|
|RHEF070|0.7|1.4|30|—|40|—|1.4|3.5|3.2|0.300|0.540|0.80|[0.205mm2(24)]|
|RHEF100|1.0|1.8|30|—|40|—|1.4|5.0|5.2|0.180|0.300|0.43|[0.205mm2(24)]|
|**RUSBF**||||||||||||||
|**16V**||||||||||||||
|RUSBF090|0.90|1.8|16|—|40|—|0.6|8.0|1.2|0.070|0.120|0.180|[0.205mm2(24)]|
|RUSBF110|1.10|2.2|16|—|40|—|0.7|8.0|2.3|0.050|0.095|0.140|[0.205mm2(24)]|
|RUSBF135|1.35|2.7|16|—|40|—|0.8|8.0|4.5|0.040|0.074|0.112|[0.205mm2(24)]|
|RUSBF160|1.60|3.2|16|—|40|—|0.9|8.0|9.0|0.030|0.061|0.110|[0.205mm2(24)]|
|RUSBF185|1.85|3.7|16|—|40|—|1.0|8.0|10.0|0.030|0.051|0.090|[0.205mm2(24)]|
|RUSBF250|2.50|5.0|16|—|40|—|1.2|8.0|40.0|0.020|0.036|0.060|[0.205mm2(24)]|
|**RGEF***||||||||||||||
|**16V**||||||||||||||
|RGEF250|2.5|4.7|16|—|100|—|1.0|12.5|5.0|0.0220|0.0350|0.0530|[0.205mm2(24)]|
|RGEF300|3.0|5.1|16|—|100|—|2.3|15.0|1.0|0.0380|0.0645|0.0975|[0.520mm2(20)]|
|RGEF400|4.0|6.8|16|—|100|—|2.4|20.0|1.7|0.0210|0.0390|0.0600|[0.520mm2(20)]|
|RGEF500|5.0|8.5|16|—|100|—|2.6|25.0|2.0|0.0150|0.0240|0.0340|[0.520mm2(20)]|
|RGEF600|6.0|10.2|16|—|100|—|2.8|30.0|3.3|0.0100|0.0190|0.0280|[0.520mm2(20)]|
|RGEF700|7.0|11.9|16|—|100|—|3.0|35.0|3.5|0.0077|0.0131|0.0200|[0.520mm2(20)]|
|RGEF800|8.0|13.6|16|—|100|—|3.0|40.0|5.0|0.0056|0.0110|0.0175|[0.520mm2(20)]|
|RGEF900|9.0|15.3|16|—|100|—|3.3|45.0|5.5|0.0047|0.0091|0.0135|[0.520mm2(20)]|
|RGEF1000|10.0|17.0|16|—|100|—|3.6|50.0|6.0|0.0040|0.0070|0.0102|[0.520mm2(20)]|
|RGEF1100|11.0|18.7|16|—|100|—|3.7|55.0|7.0|0.0037|0.0060|0.0089|[0.520mm2(20)]|
|RGEF1200|12.0|20.4|16|—|100|—|4.2|60.0|7.5|0.0033|0.0057|0.0086|[0.823mm2(18)]|
|RGEF1400|14.0|23.8|16|—|100|—|4.6|70.0|9.0|0.0026|0.0043|0.0064|[0.823mm2(18)]|



Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

**HF** Halogen Free RoHS Compliant, ELV Compliant 

## **PolySwitch Resettable Devices** Radial-Leaded Devices 

## Table R3 — Electrical Characteristics[(Cont’d)] 

**==> picture [528 x 29] intentionally omitted <==**

**----- Start of picture text -----**<br>
Part IH IT VMAX IMAX PD Typ Max Time-to-trip RMIN RMAX R1MAX Lead Size<br>Number (A) (A) (VDC)  (VAC RMS) (DCADC) (ACARMS) (W) (A) (s) ( Ω ) ( Ω ) ( Ω ) [mm [2]  (AWG)]<br>**----- End of picture text -----**<br>


|**RHEF***<br>**16V - High Temperature**|||
|---|---|---|
|RHEF200<br>2.0<br>3.8<br>16<br>—<br>100<br>—<br>1.4|10.0<br>4.3<br>0.0450<br>0.07400<br>0|.1100<br>[0.205mm2 (24)]|
|RHEF300<br>3.0<br>6.0<br>16<br>—<br>100<br>—<br>3.0|15.0<br>5.0<br>0.0330<br>0.05300<br>0|.0790<br>[0.520mm2 (20)]|
|RHEF400<br>4.0<br>7.5<br>16<br>—<br>100<br>—<br>3.3|20.0<br>5.0<br>0.0240<br>0.04000<br>0|.0600<br>[0.520mm2 (20)]|
|RHEF450<br>4.5<br>7.8<br>16<br>—<br>100<br>—<br>3.6|22.5<br>3.0<br>0.0220<br>0.03600<br>0|.0540<br>[0.520mm2 (20)]|
|RHEF550<br>5.5<br>10.0<br>16<br>—<br>100<br>—<br>3.5|27.5<br>6.0<br>0.0150<br>0.02500<br>0|.0370<br>[0.520mm2 (20)]|
|RHEF600<br>6.0<br>10.8<br>16<br>—<br>100<br>—<br>4.1|30.0<br>5.0<br>0.0130<br>0.02150<br>0|.0320<br>[0.520mm2 (20)]|
|RHEF650<br>6.5<br>12.0<br>16<br>—<br>100<br>—<br>4.1|32.5<br>5.5<br>0.0110<br>0.01750<br>0|.0260<br>[0.520mm2 (20)]|
|RHEF700<br>7.0<br>13.0<br>16<br>—<br>100<br>—<br>4.0|35.0<br>7.0<br>0.0100<br>0.01640<br>0|.0250<br>[0.520mm2 (20)]|
|RHEF750<br>7.5<br>13.1<br>16<br>—<br>100<br>—<br>4.5|37.5<br>7.0<br>0.0094<br>0.01530<br>0|.0220<br>[0.520mm2 (20)]|
|RHEF800<br>8.0<br>15.0<br>16<br>—<br>100<br>—<br>4.2|40.0<br>8.0<br>0.0080<br>0.01350<br>0|.0200<br>[0.520mm2 (20)]|
|RHEF900<br>9.0<br>16.5<br>16<br>—<br>100<br>—<br>5.0|45.0<br>10.0<br>0.0074<br>0.01200<br>0|.0170<br>[0.520mm2 (20)]|
|RHEF1000<br>10.0<br>18.5<br>16<br>—<br>100<br>—<br>5.3|50.0<br>9.0<br>0.0062<br>0.01050<br>0|.0150<br>[0.520mm2 (20)]|
|RHEF1100<br>11.0<br>20.0<br>16<br>—<br>100<br>—<br>5.5|55.0<br>11.0<br>0.0055<br>0.00900<br>0|.0130<br>[0.520mm2 (20)]|
|RHEF1300<br>13.0<br>24.0<br>16<br>—<br>100<br>—<br>6.9|65.0<br>13.0<br>0.0041<br>0.00690<br>0|.0100<br>[0.823mm2 (18)]|
|RHEF1400<br>14.0<br>27.0<br>16<br>—<br>100<br>—<br>6.9|70.0<br>13.0<br>0.0030<br>0.00600<br>0|.0090<br>[0.823mm2 (18)]|
|RHEF1500<br>15.0<br>28.0<br>16<br>—<br>100<br>—<br>7.0|75.0<br>20.0<br>0.0032<br>0.00613<br>0|.0092<br>[0.823mm2 (18)]|
|**RUSBF**<br>**6V**|||
|RUSBF075<br>0.75<br>1.30<br>6<br>—<br>40<br>—<br>0.3|8.0<br>0.4<br>0.110<br>0.1750<br>|0.23<br>[0.205mm2 (24)]|
|RUSBF120<br>1.20<br>2.00<br>6<br>—<br>40<br>—<br>0.6<br><br><br><br><br><br>|8.~~0~~<br>0.5<br>0.070<br>0.0975<br><br><br><br><br><br>|0.~~14~~<br>[0.~~2~~05mm2 (24)]<br><br>2|



## **Notes:** 

IH : Hold current: maximum current device will pass without interruption in 20°C still air. IT : Trip current: minimum current that will switch the device from low resistance to high resistance in 20°C still air. 

VMAX : Maximum continuous voltage device can withstand without damage at rated current. 

IMAX : Maximum fault current device can withstand without damage at rated voltage. PD : Power dissipated from device when in the tripped state in 20°C still air. RMIN : Minimum resistance of device as supplied at 20°C unless otherwise specified. 

RMAX : Maximum resistance of device as supplied at 20°C unless otherwise specified. 

R1MAX : Maximum resistance of device when measured one hour post reflow (surface-mount device) or one hour post trip  (radial-leaded device) at 20°C unless otherwise specified. 

* Electrical characteristics determined at 25°C. 

## Figures R6-R14 — Dimension Figures 

**==> picture [528 x 256] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure R6 Figure R7 Figure R8<br>A E A E A E<br>B B<br>B<br>D D<br>D<br>C F C F C F<br>CL to CL CL CL CL to CL CL CL CL to CL CL CL<br>Figure R9 Figure R10 Figure R11<br>A E A E A E<br>B<br>B B<br>D<br>D<br>D<br>C F C F C F<br>CL to CL CL CL CL to CL C L  C L CL to CL CL CL<br>**----- End of picture text -----**<br>


Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

> RoHS Compliant, ELV Compliant **HF** Halogen Free 

**PolySwitch Resettable Devices** Radial-Leaded Devices 

**==> picture [528 x 158] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figures R6-R14 — Dimension Figures (Cont’d)<br>Figure R12 Figure R13 Figure R14<br>A E<br>A<br>C<br>B<br>J<br>J E H<br>D<br>C F<br>CL to CL CL CL<br>**----- End of picture text -----**<br>


## Table R4 — Dimensions and Weights 

**==> picture [528 x 42] intentionally omitted <==**

**----- Start of picture text -----**<br>
Dimensions in Millimeters (Inches)<br>A B C D E F H J Figure Device Mass (g)<br>Part  (Only for Reference)<br>Number Min Max Min Max Min Max Min Max Min Max Typ Typ Typ<br>**----- End of picture text -----**<br>


|Table R4 — D|Table R4 — D|imen|sions and Weights|sions and Weights|sions and Weights|sions and Weights|sions and Weights|||
|---|---|---|---|---|---|---|---|---|---|
|**Part**<br>**Number**<br>**A**<br>**Min**<br>|||**Dimensions in Millim**|||||**eters (Inches)**|**Figure**<br>**Device Mass (g)**<br>**(Only for Reference)**<br>**E**<br>**F**<br>**H**<br>**J**<br>**in**<br>**Max**<br>**Typ**<br>**Typ**<br>**Typ**|
||**A**|**B**<br>**C**<br>||||||**D**||
||**Min**<br>|**Max**|**Min**<br>**Max**<br>**Min**<br>**Max**<br>**Min**|||||**Max**<br>**M**||
|||||||||||
|**RXEF**<br>**60V**||||||||||
|RXEF005<br>—<br>8.0<br>—<br>8.3<br>4.3<br>5.8<br>7.6<br><br><br> <br>||||||||—<br>—<br>3.0<br>—<br>1.07<br>1.0<br>R7, R13,<br>0.069<br><br><br><br>||
|(0.32)<br>(0.33)<br>(0.17) (0.23)<br>(0.30)<br>(0.12)<br>(0.042)<br>(0.04)<br>R14||||||||||
|RXEF010<br>—<br>7.4<br>—<br>11.6<br>4.3<br>5.8<br>7.6<br>—<br>—<br>3.0<br>—<br>1.07<br>1.0<br>R8, R13,<br>0.128<br>(0.29)<br>(0.46)<br>(0.17) (0.23)<br>(0.30)<br>(0.12)<br>(0.042)<br>(0.04)<br>R14||||||||||
|RXEF017<br>—<br>7.4<br>—<br>12.7<br>4.3<br>5.8<br>7.6<br>—<br>—<br>3.0<br>—<br>1.68<br>1.7<br>R8, R13,<br>0.174<br>(0.29)<br>(0.50)<br>(0.17) (0.23)<br>(0.30)<br>(0.12)<br>(0.066)<br>(0.07)<br>R14||||||||||
|**RXEF**<br>**72V**||||||||||
|RXEF020<br>—<br>7.4<br>—<br>11.7<br>4.3<br>5.8<br>7.6<br>—<br>—<br>3.0<br>—<br>1.17<br>1.0<br>R8, R13,<br>0.119<br>(0.29)<br>(0.46)<br>(0.17) (0.23)<br>(0.30)<br>(0.12)<br>(0.046)<br>(0.04)<br>R14||||||||||
|RXEF025<br>—<br>7.4<br>—<br>(0.29)|||||12.7<br>(0.50)|4.3<br>(0.1|<br>5.8<br>7.6<br>—<br>—<br>3.0<br>—<br>1.17<br>1.0<br>R8, R13,<br>0.130<br>7) (0.23)<br>(0.30)<br>(0.12)<br>(0.046)<br>(0.04)<br>R14|||
|RXEF030<br>—<br>7.4<br>—<br>12.7<br>4.3<br>5.8<br>7.6<br>—<br>—<br>3.0<br>—<br>1.17<br>1.0<br>R8, R13,<br>0.143<br>(0.29)<br>(0.50)<br>(0.17) (0.23)<br>(0.30)<br>(0.12)<br>(0.046)<br>(0.04)<br>R14||||||||||
|RXEF040<br>—<br>7.6<br>—<br>13.5<br>4.3<br>5.8<br>7.6<br>—<br>—<br>3.0<br>—<br>1.17<br>1.2<br>R8, R13,<br>0.202<br>(0.30)<br>(0.53)<br>(0.17) (0.23)<br>(0.30)<br>(0.12)<br>(0.046)<br>(0.05)<br>R14||||||||||
|RXEF050<br>—<br>7.9<br>—<br>13.7<br>4.3<br>5.8<br>7.6<br>—<br>—<br>3.0<br>—<br>1.17<br>1.2<br>R8, R13,<br>0.210<br>(0.31)<br>(0.54)<br>(0.17) (0.23)<br>(0.30)<br>(0.12)<br>(0.046)<br>(0.05)<br>R14||||||||||
|RXEF065<br>—<br>9.4<br>—<br>14.5<br>4.3<br>5.8<br>7.6<br>—<br>—<br>3.0<br>—<br>1.17<br>1.5<br>R8, R13,<br>0.277<br>(0.37)<br>(0.57)<br>(0.17) (0.23)<br>(0.30)<br>(0.12)<br>(0.046)<br>(0.06)<br>R14||||||||||
|RXEF075<br>—<br>10.2<br>—<br>15.2<br>4.3<br>5.8<br>7.6<br>—<br>—<br>3.0<br>—<br>1.17<br>1.5<br>R8, R13,<br>0.310<br>(0.40)<br>(0.60)<br>(0.17) (0.23)<br>(0.30)<br>(0.12)<br>(0.046)<br>(0.06)<br>R14||||||||||
|RXEF090<br>—<br>11.2<br>—<br>15.8<br>4.3<br>5.8<br>7.6<br>—<br>—<br>3.0<br>—<br>1.17<br>1.5<br>R8, R13,<br>0.365<br>(0.44)<br>(0.62)<br>(0.17) (0.23)<br>(0.30)<br>(0.12)<br>(0.046)<br>(0.06)<br>R14||||||||||
|RXEF110<br>—<br>12.8<br>—<br>17.5<br>4.3<br>5.8<br>7.6<br>—<br>—<br>3.0<br>—<br>1.37<br>1.2<br>R9, R13,<br>0.546<br>(0.50)<br>(0.69)<br>(0.17) (0.23)<br>(0.30)<br>(0.12)<br>(0.054)<br>(0.05)<br>R14||||||||||
|RXEF135<br>—<br>14.5<br>—<br>19.1<br>4.3<br>5.8<br>7.6<br>—<br>—<br>3.0<br>—<br>1.37<br>1.2<br>R9, R13,<br>0.653<br>(0.57)<br>(0.75)<br>(0.17) (0.23)<br>(0.30)<br>(0.12)<br>(0.054)<br>(0.05)<br>R14||||||||||
|RXEF160<br>—<br>16.3<br>—<br>20.8<br>4.3<br>5.8<br>7.6<br>—<br>—<br>3.0<br>—<br>1.37<br>1.5<br>R9, R13,<br>0.684<br>(0.64)<br>(0.82)<br>(0.17) (0.23)<br>(0.30)<br>(0.12)<br>(0.054)<br>(0.06)<br>R14||||||||||
|RXEF185<br>—<br>17.5<br>—<br>22.4<br>4.3<br>5.8<br>7.6<br>—<br>—<br>3.0<br>—<br>1.37<br>1.5<br>R9, R13,<br>0.808<br>(0.69)<br>(0.88)<br>(0.17) (0.23)<br>(0.30)<br>(0.12)<br>(0.054)<br>(0.06)<br>R14||||||||||
|RXEF250<br>—<br>20.8<br>—<br>25.4<br>9.4<br>10.9<br>7.6<br>—<br>—<br>3.0<br>—<br>1.37<br>1.7<br>R9, R13,<br>1.139<br>(0.82)<br>(1.00)<br>(0.37) (0.43)<br>(0.30)<br>(0.12)<br>(0.054)<br>(0.07)<br>R14||||||||||
|RXEF300<br>—<br>23.9<br>—<br>28.6<br>9.4<br>10.9<br>7.6<br>—<br>—<br>3.0<br>—<br>1.37<br>1.7<br>R9, R13,<br>1.379<br>(0.94)<br>(1.13)<br>(0.37) (0.43)<br>(0.30)<br>(0.12)<br>(0.054)<br>(0.07)<br>R14||||||||||
|RXEF375<br>—<br>27.2<br>—<br>31.8<br>9.4<br>10.9<br>7.6<br>—<br>—<br>3.0<br>—<br>1.37<br>1.7<br>R9, R13,<br>1.708<br>(1.07)<br>(1.25)<br>(0.37) (0.43)<br>(0.30)<br>(0.12)<br>(0.054)<br>(0.07)<br>R14||||||||||



Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

**HF** Halogen Free RoHS Compliant, ELV Compliant 

**PolySwitch Resettable Devices** Radial-Leaded Devices 

## Table R4 — Dimensions and Weights[(Cont’d)] 

**==> picture [528 x 42] intentionally omitted <==**

**----- Start of picture text -----**<br>
Dimensions in Millimeters (Inches)<br>A B C D E F H J Figure Device Mass (g)<br>Part  (Only for Reference)<br>Number Min Max Min Max Min Max Min Max Min Max Typ Typ Typ<br>**----- End of picture text -----**<br>


|**Number**<br>|**Min**|**Max**|**Min**|**Max**|**Min**|**Max**|**Min**|**Max**|**Min**|**Max**|**Typ**|**Typ**|**Typ**|||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|**RKEF**||||||||||||||||
|**60V**||||||||||||||||
|RKEF050|—|7.10|—|11.43|4.32|5.84|7.60|—|—|3.56|—|—|—|R10, R13,|0.166|
|||(0.28)||(0.45)|(0.17)|(0.23)|(0.30)|||(0.14)||||R14||
|RKEF065|—|7.11|—|12.20|4.32|5.84|7.60|—|—|3.56|—|—|—|R10, R13,|0.182|
|||(0.28)||(0.48)|(0.17)|(0.23)|(0.30)|||(0.14)||||R14||
|RKEF075|—|7.87|—|12.20|4.32|5.84|7.60|—|—|3.56|—|—|—|R10, R13,|0.201|
|||(0.31)||(0.48)|(0.17)|(0.23)|(0.30)|||(0.14)||||R14||
|RKEF090|—|7.87|—|13.97|4.32|5.84|7.60|—|—|3.56|—|—|—|R10, R13,|0.235|
|||(0.31)||(0.55)|(0.17)|(0.23)|(0.30)|||(0.14)||||R14||
|RKEF110|—|7.60|—|15.00|4.32|5.84|7.60|—|—|4.10|—|—|—|R10, R13,|0.353|
|||(0.30)||(0.59)|(0.17)|(0.23)|(0.30)|||(0.16)||||R14||
|RKEF135|—|10.20|—|17.00|4.32|5.84|7.60|—|—|3.81|—|—|—|R11, R13,|0.438|
|||(0.40)||(0.67)|(0.17)|(0.23)|(0.30)|||(0.15)||||R14||
|RKEF160|—|12.20|—|18.30|4.32|5.84|7.60|—|—|3.81|—|—|—|R11, R13,|0.546|
|||(0.48)||(0.72)|(0.17)|(0.23)|(0.30)|||(0.15)||||R14||
|RKEF185|—|13.00|—|18.80|4.32|5.84|7.60|—|—|3.81|—|—|—|R11, R13,|0.538|
|||(0.51)||(0.74)|(0.17)|(0.23)|(0.30)|||(0.15)||||R14||
|RKEF250|—|14.00|—|20.60|4.32|5.84|7.60|—|—|3.00|—|—|—|R11, R13,|0.775|
|||(0.55)||(0.81)|(0.17)|(0.23)|(0.30)|||(0.12)||||R14||
|RKEF300|—|16.50|—|21.20|4.32|5.84|7.60|—|—|3.00|—|—|—|R11, R13,|0.971|
|||(0.65)||(0.83)|(0.17)|(0.23)|(0.30)|||(0.12)||||R14||
|RKEF375|—|16.50|—|25.20|9.40|10.90|7.60|—|—|3.00|—|—|—|R11, R13,|1.142|
|||(0.65)||(0.99)|(0.37)|(0.43)|(0.30)|||(0.12)||||R14||
|RKEF400|—|21.00|—|24.90|9.40|10.90|7.60|—|—|3.00|—|—|—|R11, R13,|1.391|
|||(0.83)||(0.98)|(0.37)|(0.43)|(0.30)|||(0.12)||||R14||
|RKEF500|—|24.10|—|29.00|9.40|10.90|7.60|—|—|3.00|—|—|—|R11, R13,|1.783|
|||(0.95)||(1.14)|(0.37)|(0.43)|(0.30)|||(0.12)||||R14||
|**RUEF**||||||||||||||||
|**30V**||||||||||||||||
|RUEF090|—|7.4|—|12.2|4.3|5.8|7.6|—|—|3.0|—|0.89|0.8|R10, R13,|0.183|
|||(0.29)||(0.48)|(0.17)|(0.23)|(0.30)|||(0.12)||(0.035)|(0.03)|R14||
|RUEF110|—|7.4|—|14.2|4.3|5.8|7.6|—|—|3.0|—|0.89|0.8|R10, R13,|0.204|
|||(0.29)||(0.56)|(0.17)|(0.23)|(0.30)|||(0.12)||(0.035)|(0.03)|R14||
|RUEF135|—|8.9|—|13.5|4.3|5.8|7.6|—|—|3.0|—|0.89|1.0|R10, R13,|0.255|
|||(0.35)||(0.53)|(0.17)|(0.23)|(0.30)|||(0.12)||(0.035)|(0.04)|R14||
|RUEF160|—|8.9|—|15.2|4.3|5.8|7.6|—|—|3.0|—|0.89|1.0|R10, R13,|0.289|
|||(0.35)||(0.60)|(0.17)|(0.23)|(0.30)|||(0.12)||(0.035)|(0.04)|R14||
|RUEF185|—|10.2|—|15.7|4.3|5.8|7.6|—|—|3.0|—|0.89|1.0|R10, R13,|0.379|
|||(0.40)||(0.62)|(0.17)|(0.23)|(0.30)|||(0.12)||(0.035)|(0.04)|R14||
|RUEF250|—|11.4|—|18.3|4.3|5.8|7.6|—|—|3.0|—|0.89|1.2|R10, R13,|0.493|
|||(0.45)||(0.72)|(0.17)|(0.23)|(0.30)|||(0.12)||(0.035)|(0.05)|R14||
|RUEF300|—|11.4|—|16.5|4.3|5.8|7.6|—|—|3.0|—|1.19|1.5|R11, R13,|0.516|
|||(0.45)||(0.65)|(0.17)|(0.23)|(0.30)|||(0.12)||(0.047)|(0.06)|R14||
|RUEF400|—|14.0|—|19.3|4.3|5.8|7.6|—|—|3.0|—|1.19|1.7|R11, R13,|0.670|
|||(0.55)||(0.76)|(0.17)|(0.23)|(0.30)|||(0.12)||(0.047)|(0.07)|R14||
|RUEF500|—|14.0|—|24.1|9.4|10.9|7.6|—|—|3.0|—|1.19|1.0|R11, R13,|0.926|
|||(0.55)||(0.95)|(0.37)|(0.43)|(0.30)|||(0.12)||(0.047)|(0.04)|R14||
|RUEF600|—|16.5|—|24.1|9.4|10.9|7.6|—|—|3.0|—|1.19|1.0|R11, R13,|1.352|
|||(0.65)||(0.95)|(0.37)|(0.43)|(0.30)|||(0.12)||(0.047)|(0.04)|R14||
|RUEF700|—|19.1|—|25.9|9.4|10.9|7.6|—|—|3.0|—|1.19|1.2|R11, R13,|1.543|
|||(0.75)||(1.02)|(0.37)|(0.43)|(0.30)|||(0.12)||(0.047)|(0.05)|R14||
|RUEF800|—|21.6|—|28.4|9.4|10.9|7.6|—|—|3.0|—|1.19|1.5|R11, R13,|1.852|
|||(0.85)||(1.12)|(0.37)|(0.43)|(0.30)|||(0.12)||(0.047)|(0.06)|R14||
|RUEF900|—|24.1|—|29.0|9.4|10.9|7.6|—|—|3.0|—|1.19|1.5|R11, R13,|2.104|
|||(0.95)||(1.14)|(0.37)|(0.43)|(0.30)|||(0.12)||(0.047)|(0.06)|R14||



Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

RoHS Compliant, ELV Compliant 

**HF** Halogen Free 

**PolySwitch Resettable Devices** Radial-Leaded Devices 

## Table R4 — Dimensions and Weights[(Cont’d)] 

**==> picture [528 x 42] intentionally omitted <==**

**----- Start of picture text -----**<br>
Dimensions in Millimeters (Inches)<br>A B C D E F H J Figure Device Mass (g)<br>Part  (Only for Reference)<br>Number Min Max Min Max Min Max Min Max Min Max Typ Typ Typ<br>**----- End of picture text -----**<br>


|**Number**|**Min**|**Max**|**Min**|**Max**|**Min**|**Max**|**Min**|**Max**|**Min**|**Max**|**Typ**|**Typ**|**Typ**|||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|**RHEF**||||||||||||||||
|**30V - High **|**Temperature**|||||||||||||||
|RHEF050|—|7.4|—|12.7|4.3|5.8|7.6|—|—|3.0|1.2|—|—|R8, R13,|0.177|
|||(0.29)||(0.50)|(0.17)|(0.23)|(0.30)|||(0.12)|(0.05)|||R14||
|RHEF070|—|6.9|—|10.8|4.3|5.8|7.6|—|—|3.0|1.2|1.24|1.2|R10, R13,|0.259|
|||(0.27)||(0.43)|(0.17)|(0.23)|(0.30)|||(0.12)|(0.05)|(0.049)|(0.05)|R14||
|RHEF100|—|9.7|—|13.6|4.3|5.8|7.6|—|—|3.0|—|—|—|R8, R13,|0.312|
|||(0.38)||(0.54)|(0.17)|(0.23)|(0.30)|||(0.12)||||R14||
|**RUSBF**||||||||||||||||
|**16V**||||||||||||||||
|RUSBF090|—|7.4|—|12.2|4.3|5.8|7.6|—|—|3.1|—|0.89|0.8|R10, R13,|0.183|
|||(0.29)||(0.48)|(0.17)|(0.23)|(0.30)|||(0.12)||(0.035)|(0.03)|R14||
|RUSBF110|—|7.4|—|14.2|4.3|5.8|7.6|—|—|3.0|—|0.89|0.8|R10, R13,|0.204|
|||(0.29)||(0.56)|(0.17)|(0.23)|(0.30)|||(0.12)||(0.035)|(0.03)|R14||
|RUSBF135|—|8.9|—|13.5|4.3|5.8|7.6|—|—|3.0|—|0.89|1.0|R10, R13,|0.240|
|||(0.35)||(0.53)|(0.17)|(0.23)|(0.30)|||(0.12)||(0.035)|(0.04)|R14||
|RUSBF160|—|8.9|—|15.2|4.3|5.8|7.6|—|—|3.0|—|0.89|1.0|R10, R13,|0.300|
|||(0.35)||(0.60)|(0.17)|(0.23)|(0.30)|||(0.12)||(0.035)|(0.04)|R14||
|RUSBF185|—|10.2|—|15.7|4.3|5.8|7.6|—|—|3.0|—|0.89|1.0|R10, R13,|0.368|
|||(0.40)||(0.62)|(0.17)|(0.23)|(0.30)|||(0.12)||(0.035)|(0.04)|R14||
|RUSBF250|—|11.4|—|18.3|4.3|5.8|7.6|—|—|3.0|—|0.89|1.2|R10, R13,|0.467|
|||(0.45)||(0.72)|(0.17)|(0.23)|(0.30)|||(0.12)||(0.035)|(0.05)|R14||
|**RGEF**||||||||||||||||
|**16V**||||||||||||||||
|RGEF250|—|8.9|—|12.8|4.3|5.8|3.18|6.18|—|3.0|1.2|1.24|1.2|R10, R13,|0.277|
|||(0.35)||(0.50)|(0.17)|(0.23)|(0.13)|(0.24)||(0.12)|(0.05)|(0.049)|(0.05)|R14||
|RGEF300|6.1|7.1|6.1|11.0|4.3|5.8|7.6|—|2.0|3.0|1.2|1.24|1.2|R11, R13,|0.323|
||(0.24)|(0.28)|(0.24)|(0.43)|(0.17)|(0.23)|(0.30)||(0.08)|(0.12)|(0.05)|(0.049)|(0.05)|R14||
|RGEF400|7.9|8.9|7.9|12.8|4.3|5.8|7.6|—|2.0|3.0|1.2|1.24|1.4|R11, R13,|0.417|
||(0.31)|(0.35)|(0.31)|(0.50)|(0.17)|(0.23)|(0.30)||(0.08)|(0.12)|(0.05)|(0.049)|(0.06)|R14||
|RGEF500|9.4|10.4|9.4|14.3|4.3|5.8|7.6|—|2.0|3.0|1.2|1.24|1.6|R11, R13,|0.540|
||(0.37)|(0.41)|(0.37)|(0.56)|(0.17)|(0.23)|(0.30)||(0.08)|(0.12)|(0.05)|(0.049)|(0.06)|R14||
|RGEF600|9.7|10.7|12.2|17.1|4.3|5.8|7.6|—|2.0|3.0|1.2|1.24|1.6|R11, R13,|0.604|
||(0.38)|(0.42)|(0.48)|(0.67)|(0.17)|(0.23)|(0.30)||(0.08)|(0.12)|(0.05)|(0.049)|(0.06)|R14||
|RGEF700|10.2|11.2|14.7|19.7|4.3|5.8|7.6|—|2.0|3.0|1.2|1.24|1.7|R11, R13,|0.701|
||(0.40)|(0.44)|(0.58)|(0.78)|(0.17)|(0.23)|(0.30)||(0.08)|(0.12)|(0.05)|(0.049)|(0.07)|R14||
|RGEF800|11.7|12.7|16.0|20.9|4.3|5.8|7.6|—|2.0|3.0|1.2|1.24|1.8|R11, R13,|0.829|
||(0.46)|(0.50)|(0.63)|(0.82)|(0.17)|(0.23)|(0.30)||(0.08)|(0.12)|(0.05)|(0.049)|(0.07)|R14||
|RGEF900|13.0|14.0|16.8|21.7|4.3|5.8|7.6|—|2.0|3.0|1.2|1.24|2.0|R11, R13,|0.887|
||(0.51)|(0.55)|(0.66)|(0.85)|(0.17)|(0.23)|(0.30)||(0.08)|(0.12)|(0.05)|(0.049)|(0.08)|R14||
|RGEF1000|—|16.5|21.1|25.2|4.3|5.8|7.6|—|2.0|3.0|1.2|1.24|2.0|R11, R13,|1.219|
|||(0.65)|(0.83)|(0.99)|(0.17)|(0.23)|(0.30)||(0.08)|(0.12)|(0.05)|(0.049)|(0.08)|R14||
|RGEF1100|16.5|17.5|21.1|26.0|4.3|5.8|7.6|—|2.0|3.0|1.2|1.24|2.4|R11, R13,|1.408|
||(0.65)|(0.69)|(0.83)|(1.02)|(0.17)|(0.23)|(0.30)||(0.08)|(0.12)|(0.05)|(0.049)|(0.09)|R14||
|RGEF1200|16.4|17.5|22.6|28.0|9.4|10.9|7.6|—|2.3|3.5|1.4|1.45|1.5|R11, R13,|1.650|
||(0.65)|(0.69)|(0.89)|(1.10)|(0.37)|(0.43)|(0.30)||(0.09)|(0.14)|(0.06)|(0.057)|(0.06)|R14||
|RGEF1400|—|23.5|22.6|27.9|9.4|10.9|7.6|—|2.3|3.5|1.4|1.45|1.9|R11, R13,|2.146|
|||(0.925)|(0.89)|(1.10)|(0.37)|(0.43)|(0.30)||(0.09)|(0.14)|(0.06)|(0.057)|(0.08)|R14||
|**RHEF**||||||||||||||||
|**16V - High **|**Temperature**|||||||||||||||
|RHEF200|—|9.4|—|14.4|4.3|5.8|7.6|—|—|3.1|—|—|—|R8, R13,|0.278|
|||(0.37)||(0.57)|(0.17)|(0.23)|(0.30)|||(0.12)||||R14||
|RHEF300|—|8.8|—|13.8|4.3|5.8|7.6|—|—|3.0|1.2|—|—|R12, R13,|0.433|
|||(0.35)||(0.55)|(0.17)|(0.23)|(0.30)|||(0.12)|(0.05)|||R14||
|RHEF400|—|10.0|—|15.0|4.3|5.8|7.6|—|—|3.0|1.2|1.24|1.6|R12, R13,|0.509|
|||(0.39)||(0.59)|(0.17)|(0.23)|(0.30)|||(0.12)|(0.05)|(0.049)|(0.06)|R14||



Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

**HF** Halogen Free RoHS Compliant, ELV Compliant 

**PolySwitch Resettable Devices** Radial-Leaded Devices 

## Table R4 — Dimensions and Weights[(Cont’d)] 

**==> picture [528 x 42] intentionally omitted <==**

**----- Start of picture text -----**<br>
Dimensions in Millimeters (Inches)<br>A B C D E F H J Figure Device Mass (g)<br>Part  (Only for Reference)<br>Number Min Max Min Max Min Max Min Max Min Max Typ Typ Typ<br>**----- End of picture text -----**<br>


|**Number**|**Min**|**Max**|**Min**|**Max**|**Min**|**Max**|**Min**|**Max**|**Min**|**Max**|**Typ**|**Typ**|**Typ**|||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|**RHEF**||||||||||||||||
|**16V - High **|**Temperature**|||||||||||||||
|RHEF450|—|10.4|—|15.6|4.3|5.8|7.6|—|—|3.0|1.2|1.24|1.6|R12, R13,|0.605|
|||(0.41)||(0.61)|(0.17)|(0.23)|(0.30)|||(0.12)|(0.05)|(0.049)|(0.06)|R14||
|RHEF550|—|11.2|—|18.9|4.3|5.8|7.6|—|—|3.0|1.2|—|—|R12, R13,|0.704|
|||(0.44)||(0.74)|(0.17)|(0.23)|(0.30)|||(0.12)|(0.05)|||R14||
|RHEF600|—|11.2|—|21.0|4.3|5.8|7.6|—|—|3.0|1.2|1.24|1.7|R12, R13,|0.792|
|||(0.44)||(0.83)|(0.17)|(0.23)|(0.30)|||(0.12)|(0.05)|(0.049)|(0.067)|R14||
|RHEF650|—|12.7|—|22.2|4.3|5.8|7.6|—|—|3.0|1.2|1.24|1.8|R12, R13,|0.952|
|||(0.50)||(0.88)|(0.17)|(0.23)|(0.30)|||(0.12)|(0.05)|(0.049)|(0.07)|R14||
|RHEF700|—|14.0|—|21.9|4.3|5.8|7.6|—|—|3.0|1.2|—|—|R12, R13,|0.850|
|||(0.55)||(0.86)|(0.17)|(0.23)|(0.30)|||(0.12)|(0.05)|||R14||
|RHEF750|—|14.0|—|23.5|4.3|5.8|7.6|—|—|3.0|1.2|1.24|2.0|R12, R13,|1.054|
|||(0.55)||(0.93)|(0.17)|(0.23)|(0.30)|||(0.12)|(0.05)|(0.049)|(0.08)|R14||
|RHEF800|—|16.5|—|22.5|4.3|5.8|7.6|—|—|3.0|1.2|—|—|R12, R13,|1.073|
|||(0.65)||(0.88)|(0.17)|(0.23)|(0.30)|||(0.12)|(0.05)|||R14||
|RHEF900|—|16.5|—|25.7|4.3|5.8|7.6|—|—|3.0|1.2|—|—|R12, R13,|1.516|
|||(0.65)||(1.01)|(0.17)|(0.23)|(0.30)|||(0.12)|(0.05)|||R14||
|RHEF1000|—|17.5|—|26.5|9.4|10.9|7.6|—|—|3.0|1.2|1.24|1.5|R12, R13,|1.791|
|||(0.69)||(1.04)|(0.37)|(0.43)|(0.30)|||(0.12)|(0.05)|(0.049)|(0.06)|R14||
|RHEF1100|—|21.0|—|26.1|9.4|10.9|7.6|—|—|3.0|1.2|—|—|R12, R13,|1.570|
|||(0.83)||(1.03)|(0.37)|(0.43)|(0.30)|||(0.12)|(0.05)|||R14||
|RHEF1300|—|23.5|—|28.7|9.4|10.9|7.6|—|—|3.6|1.4|1.45|1.9|R12, R13,|2.257|
|||(0.925)||(1.13)|(0.37)|(0.43)|(0.30)|||(0.14)|(0.06)|(0.057)|(0.084)|R14||
|RHEF1400|—|23.5|—|28.6|9.4|10.9|7.6|—|—|3.6|1.4|—|—|R12, R13,|2.051|
|||(0.925)||(1.13)|(0.37)|(0.43)|(0.30)|||(0.14)|(0.06)|||R14||
|RHEF1500|—|23.5|—|28.7|9.4|10.9|7.6|—|—|3.6|1.4|1.45|1.9|R12, R13,|2.257|
|||(0.925)||(1.13)|(0.37)|(0.43)|(0.30)|||(0.14)|(0.06)|(0.057)|(0.084)|R14||
|**RUSBF**||||||||||||||||
|**6V**||||||||||||||||
|RUSBF075|—|6.9|—|11.4|4.3|5.9|7.6|—|—|3.1|—|0.91|1.0|R8, R13,|0.123|
|||(0.27)||(0.45)|(0.17)|(0.23)|(0.30)|||(0.12)||(0.036)|(0.04)|R14||
|RUSBF120|—|6.9|—|11.7|4.3|5.9|7.6|—|—|3.1|—|0.91|1.0|R8, R13,|0.111|
|||(0.27)||(0.46)|(0.17)|(0.23)|(0.30)|||(0.12)||(0.036)|(0.04)|R14||
|RUSBF155|—|6.9|—|11.7|4.3|5.9|7.6|—|—|3.1|—|0.91|1.0|R8, R13,|0.135|
|||(0.27)||(0.46)|(0.17)|(0.23)|(0.30)|||(0.12)||(0.036)|(0.04)|R14||



Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

RoHS Compliant, ELV Compliant 

**HF** Halogen Free 

**PolySwitch Resettable Devices** Radial-Leaded Devices 

## Figures R15-R20 — Typical Time-to-Trip Curves at 20°C 

**==> picture [528 x 422] intentionally omitted <==**

**----- Start of picture text -----**<br>
RXEF<br>Figure R15<br>A =  RXEF005 J =  RXEF075<br>B =  RXEF010 K =  RXEF090 1000 B C D E F G H I J K L M NO P Q R<br>C =  RXEF017 L =  RXEF110<br>D =  RXEF020 M =  RXEF135 100<br>E =  RXEF025 N =  RXEF160 A<br>F =  RXEF030 O =  RXEF185 10<br>G =  RXEF040 P =  RXEF250<br>H =  RXEF050 Q =  RXEF300 1 R<br>Q<br>I  =  RXEF065 R =  RXEF375<br>P<br>0.1 O<br>N<br>M<br>L<br>0.01 K<br>J<br>A I<br>0.0010.1 1 B 10 C D E F G H 100<br>Fault Current (A)<br>RKEF<br>Figure R16<br>A =  RKEF050 J =  RKEF300<br>B =  RKEF065 K =  RKEF375 100 E F G H I J K L M<br>C =  RKEF075 L =  RKEF400<br>D =  RKEF090 M =  RKEF500 A B C D<br>E =  RKEF110 10<br>F =  RKEF135<br>G =  RKEF160 M<br>H =  RKEF185 1 L<br>K<br>I  =  RKEF250<br>J<br>I<br>0.1<br>H<br>G<br>F<br>0.011 10 A BCD E 100<br>Fault Current (A)<br>Time-to-Trip (s)<br>Time-to-Trip (s)<br>**----- End of picture text -----**<br>


## **RUEF** 

|A|=|RUEF090|H|=|RUEF400|
|---|---|---|---|---|---|
|B|=|RUEF110|I|=|RUEF500|
|C|=|RUEF135|J|=|RUEF600|
|D|=|RUEF160|K|=|RUEF700|
|E|=|RUEF185|L|=|RUEF800|
|F|=|RUEF250|M|=|RUEF900|
|G|=|RUEF300||||



## **Figure R17** 

**==> picture [289 x 176] intentionally omitted <==**

**----- Start of picture text -----**<br>
100<br>A B C D E F G K [L] [M]<br>H I J<br>10<br>1 M<br>L<br>K<br>J<br>I<br>0.1 H<br>G<br>F<br>E<br>D<br>0.01 1 10 A B C 100<br>Fault Current (A)<br>Time-to-Trip (s)<br>**----- End of picture text -----**<br>


Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

RoHS Compliant, ELV Compliant 

**HF** Halogen Free 

**PolySwitch Resettable Devices** Radial-Leaded Devices 

Figures R15-R20 — Typical Time-to-Trip Curves at 20°C 

(Cont’d) 

## **RGEF (data at 25°C)** 

- A = RGEF250 

- B = RGEF300 

- C = RGEF400 

- D = RGEF500 

- E = RGEF600 

F = RGEF700 G = RGEF800 

- H = RGEF900 

I = RGEF1000 J = RGEF1100 K = RGEF1200 L = RGEF1400 

|**RHEF**|**RHEF**|**(data at 25°C)**|||
|---|---|---|---|---|
|A|=|RHEF050|K =|RHEF700|
|B|=|RHEF070|L =|RHEF750|
|C|=|RHEF100|M =|RHEF800|
|D|=|RHEF200|N =|RHEF900|
|E|=|RHEF300|O =|RHEF1000|
|F|=|RHEF400|P =|RHEF1100|
|G|=|RHEF450|Q =|RHEF1300|
|H|=|RHEF550|R =|RHEF1400|
|I|=|RHEF600|S =|RHEF1500|
|J|=|RHEF650|||



**==> picture [341 x 415] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure R18<br>1000 A B C D E FGH I J K L<br>100<br>10<br>L<br>1 K<br>J<br>I<br>H<br>A G<br>0.1 F<br>E<br>D<br>0.01<br>C<br>B<br>0.001<br>1 10 100<br>Fault Current (A)<br>Figure R19<br>1000 C D E F G H I JKLM N O P QRS<br>100<br>B<br>A<br>10<br>S<br>P [QR]<br>1<br>N [O]<br>M<br>L<br>K<br>0.1 J<br>I<br>H<br>G<br>0.01 F<br>1 10 A B C D E 100<br>Fault Current (A)<br>Time-to-Trip (s)<br>Time-to-Trip (s)<br>**----- End of picture text -----**<br>


## **RUSBF** 

A = RUSBF075 B = RUSBF090 

C = RUSBF110 

- D = RUSBF120 

- E = RUSBF135 

- F = RUSBF155 

G = RUSBF160 

H = RUSBF185 I = RUSBF250 

## **Figure R20** 

**==> picture [285 x 179] intentionally omitted <==**

**----- Start of picture text -----**<br>
100 C D E F G H I<br>B<br>A<br>10<br>1<br>I<br>H<br>0.1 G<br>F<br>E<br>0.01 D<br>C<br>A B<br>0.001<br>1 10 100<br>Fault Current (A)<br>Time-to-Trip (s)<br>**----- End of picture text -----**<br>


Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

RoHS Compliant, ELV Compliant 

**HF** Halogen Free 

**PolySwitch Resettable Devices** Radial-Leaded Devices 

Table R5 — Physical Characteristics and Environmental Specifications 

**==> picture [528 x 627] intentionally omitted <==**

**----- Start of picture text -----**<br>
RXEF<br>Physical Characteristics<br>Lead Material RXEF005                 : Tin-plated Nickel-copper Alloy, 0.128mm [2]  (26AWG), ø0.40mm (0.016in)<br>RXEF010                  : Tin-plated Nickel-copper Alloy, 0.205mm [2]  (24AWG), ø0.51mm (0.020in)<br>RXEF017 to 040       : Tin-plated Copper-clad Steel, 0.205mm [2]  (24AWG), ø0.51mm (0.020in)<br>RXEF050 to 090      : Tin-plated Copper, 0.205mm [2]  (24AWG), ø0.51mm (0.020in)<br>RXEF110 to 375       : Tin-plated Copper, 0.52mm [2]  (20AWG), ø0.81mm (0.032in)<br>Soldering Characteristics        Solderability per ANSI/J-STD-002 Category 3<br>RXEF005, RXEF010 Meet ANSI/J-STD-002 Category 1<br>Solder Heat Withstand RXEF005- RXEF025: per IEC-STD 68-2-20, Test Tb, Method 1a, Condition a;<br>Can Withstand 5s at 260°C ±5°C<br>All Other Sizes        : per IEC-STD 68-2-20, Test Tb, Method 1a, Condition b;<br>Can Withstand 10s at 260°C ±5°C<br>Insulating Material Cured, Flame-retardant Epoxy Polymer; Meets UL 94V-0<br>Operation Temperature -40°C~85°C<br>Note:  Devices are not designed to be placed through a reflow process.<br>Environmental Specifications<br>Test Conditions Resistance Change<br>Passive Aging -40°C, 1000 hrs  ±5%<br>85°C, 1000 hrs ±5%<br>Humidity Aging 85°C, 85%RH, 1000 hrs ±10%<br>Thermal Shock 85°C, -40°C (10 Times) ±10%<br>Solvent Resistance MIL-STD-202, Method 215F No Change<br>RKEF<br>Physical Characteristics<br>Lead Material RKEF050 to 090    : Tin-plated Copper, 0.205mm [2]  (24AWG), ø0.51mm (0.020in)<br>RKEF110 to 500     : Tin-plated Copper, 0.52mm [2]  (20AWG), ø0.81mm (0.032in)<br>Soldering Characteristics        Solderability per ANSI/J-STD-002 Category 3<br>Solder Heat Withstand RKEF050-RKEF185: per IEC-STD 68-2-20, Test Tb, Method 1a, Condition a;<br>Can Withstand 5s at 260°C ±5°C<br>All Other Sizes      : per IEC-STD 68-2-20, Test Tb, Method 1a, Condition b;<br>RKEF Can Withstand 10s at 260°C ±5°C<br>Insulating Material Cured, Flame-retardant Epoxy Polymer; Meets UL 94V-0<br>Operation Temperature -40°C~85°C<br>Note:  Devices are not designed to be placed through a reflow process.<br>Environmental Specifications<br>Test Conditions Resistance Change<br>Passive Aging -40°C, 1000 hrs  ±5%<br>85°C, 1000 hrs ±5%<br>Humidity Aging 85°C, 85%RH, 1000 hrs ±10%<br>Thermal Shock 85°C, -40°C (10 Times) ±10%<br>Solvent Resistance MIL-STD-202, Method 215F No Change<br>**----- End of picture text -----**<br>


Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

RoHS Compliant, ELV Compliant 

**HF** Halogen Free 

**PolySwitch Resettable Devices** Radial-Leaded Devices 

## [(Cont’d)] Table R5 — Physical Characteristics and Environmental Specifications 

**==> picture [528 x 513] intentionally omitted <==**

**----- Start of picture text -----**<br>
RUEF<br>Physical Characteristics<br>Lead Material RUEF090 to RUEF250: Tin-plated Copper-clad Steel, 0.205mm [2]  (24AWG)<br>RUEF300 to RUEF900: Tin-plated Copper, 0.52mm [2]  (20AWG), ø0.81mm (0.032in)<br>Soldering Characteristics       Solderability per ANSI/J-STD-002 Category 3<br>Solder Heat Withstand     per IEC-STD 68-2-20, Test Tb, Method1A, Condition B, Can Withstand 10s at 260°C ±5°C<br>Insulating Material Cured, Flame-retardant Epoxy Polymer; Meets UL 94V-0<br>Operation Temperature -40°C~85°C<br>Note:  Devices are not designed to be placed through a reflow process.<br>Environmental Specifications<br>Test Conditions Resistance Change<br>Passive Aging 70°C, 1000 hrs ±5%<br>85°C, 1000 hrs ±5%<br>Humidity Aging 85°C, 85%RH, 1000 hrs ±5%<br>Thermal Shock 85°C, -40°C (10 times) ±5%<br>Solvent Resistance MIL-STD-202, Method 215F No Change<br>RUSBF<br>Physical Characteristics<br>Lead Material RUSBF075                      : Tin-plated Nickel-copper Alloy, 0.205mm [2]  (24AWG), ø0.51mm/0.020in<br>RUSBF090 to RUSBF250: Tin-plated Copper-clad Steel, 0.205mm [2]  (24AWG), ø0.51mm/0.020in<br>Soldering Characteristics      Solderability per ANSI/J-STD-002 Category 3 Except<br>RUSBF075 Meet ANSI/J-STD-002 Category 1<br>Solder Heat Withstand      RUSBF120: per IEC-STD 68-2-20, Test Tb, Method 1A, Condition A; Can Withstand 5s at 260°C ±5°C<br>All Others : per IEC-STD 68-2-20, Test Tb, Method 1A, Condition B; Can Withstand 10s at 260°C ±5°C<br>Insulating Material       Cured, Flame-retardant Epoxy Polymer; Meets UL 94V-0<br>Operation Temperature -40°C~85°C<br>Note:  Devices are not designed to be placed through a reflow process.<br>Environmental Specifications<br>Test Conditions Resistance Change<br>Passive Aging 70°C, 1000 hrs  ±5%<br>85°C, 1000 hrs ±5%<br>Humidity Aging 85°C, 85%RH, 1000 hrs ±5%<br>Thermal Shock 85°C, -40°C (10 Times) ±5%<br>Solvent Resistance MIL-STD-202, Method 215F No change<br>**----- End of picture text -----**<br>


Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

RoHS Compliant, ELV Compliant 

**HF** Halogen Free 

**PolySwitch Resettable Devices** Radial-Leaded Devices 

## [(Cont’d)] Table R5 — Physical Characteristics and Environmental Specifications 

**==> picture [528 x 553] intentionally omitted <==**

**----- Start of picture text -----**<br>
RGEF<br>Physical Characteristics<br>Lead Material RGEF250                       : Tin-plated Copper-clad Steel, 0.205mm [2]  (24AWG), ø0.51mm/0.020in<br>RGEF300 to RGEF1100  : Tin-plated Copper, 0.52mm [2]  (20AWG), ø0.81mm/0.032in<br>RGEF1200 to RGEF1400: Tin-plated Copper, 0.82mm [2]  (18AWG), ø1.0mm/0.04in<br>Soldering Characteristics Solderability per ANSI/J-STD-002 Category 3<br>Solder Heat Withstand RGEF250 and RGEF400 : per IEC 68-2-20, Test Tb, Method 1a, Condition a;<br>can withstand 5s at 260°C ±5°C<br>RGEF500 to RGEF1400  : per IEC 68-2-20, Test Tb, Method 1a, Condition b;<br>can withstand 10s at 260°C ±5°C<br>Insulating Material Cured, Flame-retardant Epoxy Polymer; Meets UL 94V-0<br>Operation Temperature -40°C~85°C<br>Note:  Devices are not designed to be placed through a reflow process.<br>Environmental Specifications<br>Test Conditions Resistance Change<br>Passive Aging -40°C, 1000 hrs  ±5%<br>85°C, 1000 hrs ±5%<br>Humidity Aging 85°C, 85%RH, 1000 hrs ±5%<br>Thermal Shock 85°C, -40°C (10 Times) ±5%<br>Solvent Resistance MIL-STD-202, Method 215F No Change<br>RHEF<br>Physical Characteristics<br>Lead Material RHEF050 to RHEF200   : Tin-plated Copper-clad Steel, 0.205mm [2]  (24AWG), ø0.51mm/0.020in<br>RHEF300 to RHEF1100  : Tin-plated Copper, 0.52mm [2]  (20AWG), ø0.81mm/0.032in<br>RHEF1300 to RHEF1500: Tin-plated Copper, 0.82mm [2]  (18AWG), ø1.0mm/0.04in<br>Soldering Characteristics Solderability per ANSI/J-STD-002 Category 3<br>Solder Heat Withstand per IEC 68-2-20, Test Tb, Method 1A, Condition B; Can Wthstand 10s at 260°C ±5°C<br>Insulating Material Cured, Flame-retardant Epoxy Polymer; Meets UL 94V-0<br>Operation Temperature -40°C~125°C<br>Note:  Devices are not designed to be placed through a reflow process.<br>Environmental Specifications<br>Test Conditions Resistance Change<br>Passive Aging 70°C, 1000 hrs  ±5%<br>85°C, 1000 hrs ±5%<br>Humidity Aging 85°C, 85%RH, 1000 hrs ±5%<br>Thermal Shock 125°C, -40°C (10 Times) ±5%<br>Solvent Resistance MIL-STD-202, Method 215F No Change<br>**----- End of picture text -----**<br>


## Storage Conditions 

Storage Conditions 40°C max, 70% RH max; devices should remain in original sealed bags prior to use. Devices may not meet specified values if these storage conditions are exceeded. 

Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

RoHS Compliant, ELV Compliant 

**HF** Halogen Free 

**PolySwitch Resettable Devices** Radial-Leaded Devices 

## Table R6 — Packaging and Marking Information 

**==> picture [528 x 25] intentionally omitted <==**

**----- Start of picture text -----**<br>
Part Bag Tape and Reel  Ammo Pack  Standard Package<br>Number Quantity Quantity Quantity Quantity Part Marking Agency Recognition<br>**----- End of picture text -----**<br>


|**Part**<br>**Number**|**Bag**<br>**Quantity**|**Tape and Reel**<br>**Quantity**|**Ammo Pack**<br>**Quantity**|**Standard Package**<br>**Quantity**|**Part Marking**|**Agency Recognition**|
|---|---|---|---|---|---|---|
|**RXEF**|||||||
|**60V**|||||||
|RXEF005|500|—|—|10,000|—|UL, CSA, TÜV, CQC|
|RXEF005-2|—|3,000|—|15,000|—|UL, CSA, TÜV, CQC|
|RXEF005-AP|—|—|2,000|10,000|—|UL, CSA, TÜV, CQC|
|RXEF010|500|—|—|10,000|X10|UL, CSA, TÜV, CQC|
|RXEF010-2|—|3,000|—|15,000|X10|UL, CSA, TÜV, CQC|
|RXEF010-AP|—|—|2,000|10,000|X10|UL, CSA, TÜV, CQC|
|RXEF017|500|—|—|10,000|X17|UL, CSA, TÜV, CQC|
|RXEF017-2|—|2,500|—|12,500|X17|UL, CSA, TÜV, CQC|
|RXEF017-AP|—|—|2,000|10,000|X17|UL, CSA, TÜV, CQC|
|**RXEF**|||||||
|**72V**|||||||
|RXEF020|500|—|—|10,000|X20|UL, CSA, TÜV, CQC|
|RXEF020-2|—|3,000|—|15,000|X20|UL, CSA, TÜV, CQC|
|RXEF020-AP|—|—|2,000|10,000|X20|UL, CSA, TÜV, CQC|
|RXEF025|500|—|—|10,000|X25|UL, CSA, TÜV, CQC|
|RXEF025-2|—|3,000|—|15,000|X25|UL, CSA, TÜV, CQC|
|RXEF025-AP|—|—|2,000|10,000|X25|UL, CSA, TÜV, CQC|
|RXEF030|500|—|—|10,000|X30|UL, CSA, TÜV, CQC|
|RXEF030-2|—|3,000|—|15,000|X30|UL, CSA, TÜV, CQC|
|RXEF030-AP|—|—|2,000|10,000|X30|UL, CSA, TÜV, CQC|
|RXEF040|500|—|—|10,000|X40|UL, CSA, TÜV, CQC|
|RXEF040-2|—|3,000|—|15,000|X40|UL, CSA, TÜV, CQC|
|RXEF040-AP|—|—|2,000|10,000|X40|UL, CSA, TÜV, CQC|
|RXEF050|500|—|—|10,000|X50|UL, CSA, TÜV, CQC|
|RXEF050-2|—|3,000|—|15,000|X50|UL, CSA, TÜV, CQC|
|RXEF050-AP|—|—|2,000|10,000|X50|UL, CSA, TÜV, CQC|
|RXEF065|500|—|—|10,000|X65|UL, CSA, TÜV, CQC|
|RXEF065-2|—|3,000|—|15,000|X65|UL, CSA, TÜV, CQC|
|RXEF065-AP|—|—|2,000|10,000|X65|UL, CSA, TÜV, CQC|
|RXEF075|500|—|—|10,000|X75|UL, CSA, TÜV, CQC|
|RXEF075-2|—|3,000|—|15,000|X75|UL, CSA, TÜV, CQC|
|RXEF075-AP|—|—|2,000|10,000|X75|UL, CSA, TÜV, CQC|
|RXEF090|500|—|—|10,000|X90|UL, CSA, TÜV, CQC|
|RXEF090-2|—|3,000|—|15,000|X90|UL, CSA, TÜV, CQC|
|RXEF090-AP|—|—|2,000|10,000|X90|UL, CSA, TÜV, CQC|
|RXEF110|500|—|—|10,000|X110|UL, CSA, TÜV, CQC|
|RXEF110-2|—|1,500|—|7,500|X110|UL, CSA, TÜV, CQC|
|RXEF110-AP|—|—|1,000|5,000|X110|UL, CSA, TÜV, CQC|
|RXEF135|500|—|—|10,000|X135|UL, CSA, TÜV, CQC|
|RXEF135-2|—|1,500|—|7,500|X135|UL, CSA, TÜV, CQC|
|RXEF135-AP|—|—|1,000|5,000|X135|UL, CSA, TÜV, CQC|
|RXEF160|500|—|—|10,000|X160|UL, CSA, TÜV, CQC|
|RXEF160-2|—|1,500|—|7,500|X160|UL, CSA, TÜV, CQC|
|RXEF160-AP|—|—|1,000|5,000|X160|UL, CSA, TÜV, CQC|
|RXEF185|500|—|—|10,000|X185|UL, CSA, TÜV, CQC|
|RXEF185-2|—|1,500|—|7,500|X185|UL, CSA, TÜV, CQC|
|RXEF185-AP|—|—|1,000|5,000|X185|UL, CSA, TÜV, CQC|
|RXEF250|250|—|—|5,000|X250|UL, CSA, TÜV, CQC|
|RXEF250-2|—|1,000|—|5,000|X250|UL, CSA, TÜV, CQC|
|RXEF250-AP|—|—|1,000|5,000|X250|UL, CSA, TÜV, CQC|



Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

RoHS Compliant, ELV Compliant 

**HF** Halogen Free 

## **PolySwitch Resettable Devices** Radial-Leaded Devices 

Table R6 — Packaging and Marking Information[(Cont’d)] 

**==> picture [528 x 25] intentionally omitted <==**

**----- Start of picture text -----**<br>
Part Bag Tape and Reel  Ammo Pack  Standard Package<br>Number Quantity Quantity Quantity Quantity Part Marking Agency Recognition<br>**----- End of picture text -----**<br>


|**Part**<br>**Number**|**Bag**<br>**Quantity**|**Tape and Reel**<br>**Quantity**|**Ammo Pack**<br>**Quantity**|**Standard Package**<br>**Quantity**|**Part Marking**|**Agency Recognition**|
|---|---|---|---|---|---|---|
|**RXEF**|||||||
|**72V**|||||||
|RXEF300|250|—|—|5,000|X300|UL, CSA, TÜV, CQC|
|RXEF300-2|—|1,000|—|5,000|X300|UL, CSA, TÜV, CQC|
|RXEF300-AP|—|—|1,000|5,000|X300|UL, CSA, TÜV, CQC|
|RXEF375|250|—|—|5,000|X375|UL, CSA, TÜV, CQC|
|**RKEF**|||||||
|**60V**|||||||
|RKEF050|500|—|—|10,000|K50|UL, CSA, TÜV|
|RKEF065|500|—|—|10,000|K65|UL, CSA, TÜV|
|RKEF075|500|—|—|10,000|K75|UL, CSA, TÜV|
|RKEF090|500|—|—|10,000|K90|UL, CSA, TÜV|
|RKEF110|500|—|—|10,000|K110|UL, CSA, TÜV|
|RKEF135|500|—|—|10,000|K135|UL, CSA, TÜV|
|RKEF160|500|—|—|10,000|K160|UL, CSA, TÜV|
|RKEF185|500|—|—|10,000|K185|UL, CSA, TÜV|
|RKEF250|500|—|—|10,000|K250|UL, CSA, TÜV|
|RKEF300|250|—|—|5,000|K300|UL, CSA, TÜV|
|RKEF375|250|—|—|5,000|K375|UL, CSA, TÜV|
|RKEF400|250|—|—|5,000|K400|UL, CSA, TÜV|
|RKEF500|250|—|—|5,000|K500|UL, CSA, TÜV|
|**RUEF**|||||||
|**30V**|||||||
|RUEF090|500|—|—|10,000|U90|UL, CSA, TÜV, CQC|
|RUEF090-2|—|3,000|—|15,000|U90|UL, CSA, TÜV, CQC|
|RUEF090-AP|—|—|2,000|10,000|U90|UL, CSA, TÜV, CQC|
|RUEF110|500|—|—|10,000|U110|UL, CSA, TÜV, CQC|
|RUEF110-2|—|3,000|—|15,000|U110|UL, CSA, TÜV, CQC|
|RUEF110-AP|—|—|2,000|10,000|U110|UL, CSA, TÜV, CQC|
|RUEF135|500|—|—|10,000|U135|UL, CSA, TÜV, CQC|
|RUEF135-2|—|3,000|—|15,000|U135|UL, CSA, TÜV, CQC|
|RUEF135-AP|—|—|2,000|10,000|U135|UL, CSA, TÜV, CQC|
|RUEF160|500|—|—|10,000|U160|UL, CSA, TÜV, CQC|
|RUEF160-2|—|3,000|—|15,000|U160|UL, CSA, TÜV, CQC|
|RUEF160-AP|—|—|2,000|10,000|U160|UL, CSA, TÜV, CQC|
|RUEF185|500|—|—|10,000|U185|UL, CSA, TÜV, CQC|
|RUEF185-2|—|3,000|—|15,000|U185|UL, CSA, TÜV, CQC|
|RUEF185-AP|—|—|2,000|10,000|U185|UL, CSA, TÜV, CQC|
|RUEF250|500|—|—|10,000|U250|UL, CSA, TÜV, CQC|
|RUEF250-2|—|3,000|—|15,000|U250|UL, CSA, TÜV, CQC|
|RUEF250-AP|—|—|2,000|10,000|U250|UL, CSA, TÜV, CQC|
|RUEF300|500|—|—|10,000|U300|UL, CSA, TÜV, CQC|
|RUEF300-2|—|2,500|—|12,500|U300|UL, CSA, TÜV, CQC|
|RUEF300-AP|—|—|1,000|5,000|U300|UL, CSA, TÜV, CQC|
|RUEF400|500|—|—|10,000|U400|UL, CSA, TÜV, CQC|
|RUEF400-2|—|1,500|—|7,500|U400|UL, CSA, TÜV, CQC|
|RUEF400-AP|—|—|1,000|5,000|U400|UL, CSA, TÜV, CQC|
|RUEF500|250|—|—|5,000|U500|UL, CSA, TÜV, CQC|
|RUEF500-2|—|1,500|—|7,500|U500|UL, CSA, TÜV, CQC|
|RUEF500-AP|—|—|1,000|5,000|U500|UL, CSA, TÜV, CQC|
|RUEF600|250|—|—|5,000|U600|UL, CSA, TÜV, CQC|
|RUEF600-2|—|1,000|—|5,000|U600|UL, CSA, TÜV, CQC|



Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

RoHS Compliant, ELV Compliant 

**HF** Halogen Free 

## **PolySwitch Resettable Devices** Radial-Leaded Devices 

Table R6 — Packaging and Marking Information[(Cont’d)] 

**==> picture [528 x 25] intentionally omitted <==**

**----- Start of picture text -----**<br>
Part Bag Tape and Reel  Ammo Pack  Standard Package<br>Number Quantity Quantity Quantity Quantity Part Marking Agency Recognition<br>**----- End of picture text -----**<br>


|**Part**<br>**Number**|**Bag**<br>**Quantity**|**Tape and Reel**<br>**Quantity**|**Ammo Pack**<br>**Quantity**|**Standard Package**<br>**Quantity**|**Part Marking**|**Agency Recognition**|
|---|---|---|---|---|---|---|
|**RUEF**|||||||
|**30V**|||||||
|RUEF600-AP|—|—|1,000|5,000|U600|UL, CSA, TÜV, CQC|
|RUEF700|250|—|—|5,000|U700|UL, CSA, TÜV, CQC|
|RUEF700-2|—|1,000|—|5,000|U700|UL, CSA, TÜV, CQC|
|RUEF700-AP|—|—|1,000|5,000|U700|UL, CSA, TÜV, CQC|
|RUEF800|250|—|—|5,000|U800|UL, CSA, TÜV, CQC|
|RUEF800-2|—|1,000|—|5,000|U800|UL, CSA, TÜV, CQC|
|RUEF800-AP|—|—|1,000|5,000|U800|UL, CSA, TÜV, CQC|
|RUEF900|250|—|—|5,000|U900|UL, CSA, TÜV, CQC|
|RUEF900-2|—|1,000|—|4,000|U900|UL, CSA, TÜV, CQC|
|RUEF900-AP|—|—|1,000|4,000|U900|UL, CSA, TÜV, CQC|
|**RHEF**|||||||
|**30V - High Temperature**|||||||
|RHEF050|500|—|—|10,000|H0.5|UL, CSA, TÜV|
|RHEF050-2|—|2,500|—|12,500|H0.5|UL, CSA, TÜV|
|RHEF070|500|—|—|10,000|H0.7|UL, CSA, TÜV|
|RHEF070-2|—|2,500|—|12,500|H0.7|UL, CSA, TÜV|
|RHEF100|500|—|—|10,000|H1|UL, CSA, TÜV|
|RHEF100-2|—|2,500|—|12,500|H1|UL, CSA, TÜV|
|**RUSBF**|||||||
|**16V**|||||||
|RUSBF090|500|—|—|10,000|R90|UL, CSA, TÜV|
|RUSBF090-2|—|3,000|—|15,000|R90|UL, CSA, TÜV|
|RUSBF090-AP|—|—|2,000|10,000|R90|UL, CSA, TÜV|
|RUSBF110|500|—|—|10,000|R110|UL, CSA, TÜV|
|RUSBF110-2|—|3,000|—|15,000|R110|UL, CSA, TÜV|
|RUSBF110-AP|—|—|2,000|10,000|R110|UL, CSA, TÜV|
|RUSBF135|500|—|—|10,000|R135|UL, CSA, TÜV|
|RUSBF135-2|—|3,000|—|15,000|R135|UL, CSA, TÜV|
|RUSBF135-AP|—|—|2,000|10,000|R135|UL, CSA, TÜV|
|RUSBF160|500|—|—|10,000|R160|UL, CSA, TÜV|
|RUSBF160-2|—|3,000|—|15,000|R160|UL, CSA, TÜV|
|RUSBF160-AP|—|—|2,000|10,000|R160|UL, CSA, TÜV|
|RUSBF185|500|—|—|10,000|R185|UL, CSA, TÜV|
|RUSBF185-2|—|3,000|—|15,000|R185|UL, CSA, TÜV|
|RUSBF185-AP|—|—|2,000|10,000|R185|UL, CSA, TÜV|
|RUSBF250|500|—|—|10,000|R250|UL, CSA, TÜV|
|RUSBF250-2|—|3,000|—|15,000|R250|UL, CSA, TÜV|
|RUSBF250-AP|—|—|2,000|10,000|R250|UL, CSA, TÜV|
|**RGEF**|||||||
|**16V**|||||||
|RGEF250|500|—|—|10,000|G2.5|UL, CSA, TÜV|
|RGEF250-2|—|3,000|—|15,000|G2.5|UL, CSA, TÜV|
|RGEF250-AP|—|—|2,000|10,000|G2.5|UL, CSA, TÜV|
|RGEF300|500|—|—|10,000|G3|UL, CSA, TÜV|
|RGEF300-2|—|2,500|—|12,500|G3|UL, CSA, TÜV|
|RGEF300-AP|—|—|2,000|10,000|G3|UL, CSA, TÜV|
|RGEF400|500|—|—|10,000|G4|UL, CSA, TÜV|
|RGEF400-2|—|2,500|—|12,500|G4|UL, CSA, TÜV|
|RGEF400-AP|—|—|2,000|10,000|G4|UL, CSA, TÜV|
|RGEF500|500|—|—|10,000|G5|UL, CSA, TÜV|



Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

RoHS Compliant, ELV Compliant 

**HF** Halogen Free 

## **PolySwitch Resettable Devices** Radial-Leaded Devices 

Table R6 — Packaging and Marking Information[(Cont’d)] 

**==> picture [528 x 25] intentionally omitted <==**

**----- Start of picture text -----**<br>
Part Bag Tape and Reel  Ammo Pack  Standard Package<br>Number Quantity Quantity Quantity Quantity Part Marking Agency Recognition<br>**----- End of picture text -----**<br>


|**Part**<br>**Number**|**Bag**<br>**Quantity**|**Tape and Reel**<br>**Quantity**|**Ammo Pack**<br>**Quantity**|**Standard Package**<br>**Quantity**|**Part Marking**|**Agency Recognition**|
|---|---|---|---|---|---|---|
|**RGEF**|||||||
|**16V**|||||||
|RGEF500-2|—|2,000|—|10,000|G5|UL, CSA, TÜV|
|RGEF500-AP|—|—|2,000|10,000|G5|UL, CSA, TÜV|
|RGEF600|500|—|—|10,000|G6|UL, CSA, TÜV|
|RGEF600-2|—|2,000|—|10,000|G6|UL, CSA, TÜV|
|RGEF600-AP|—|—|2,000|10,000|G6|UL, CSA, TÜV|
|RGEF700|500|—|—|10,000|G7|UL, CSA, TÜV|
|RGEF700-2|—|1,500|—|7,500|G7|UL, CSA, TÜV|
|RGEF700-AP|—|—|1,500|7,500|G7|UL, CSA, TÜV|
|RGEF800|500|—|—|10,000|G8|UL, CSA, TÜV|
|RGEF800-2|—|1,500|—|7,500|G8|UL, CSA, TÜV|
|RGEF800-AP|—|—|1,500|7,500|G8|UL, CSA, TÜV|
|RGEF900|500|—|—|10,000|G9|UL, CSA, TÜV|
|RGEF900-2|—|1,000|—|5,000|G9|UL, CSA, TÜV|
|RGEF900-AP|—|—|1,000|5,000|G9|UL, CSA, TÜV|
|RGEF1000|250|—|—|5,000|G10|UL, CSA, TÜV|
|RGEF1000-2|—|1,000|—|5,000|G10|UL, CSA, TÜV|
|RGEF1000-AP|—|—|1,000|5,000|G10|UL, CSA, TÜV|
|RGEF1100|250|—|—|5,000|G11|UL, CSA, TÜV|
|RGEF1100-2|—|1,000|—|5,000|G11|UL, CSA, TÜV|
|RGEF1100-AP|—|—|1,000|5,000|G11|UL, CSA, TÜV|
|RGEF1200|250|—|—|5,000|G12|UL, CSA, TÜV|
|RGEF1200-2|—|1,000|—|5,000|G12|UL, CSA, TÜV|
|RGEF1200-AP|—|—|1,000|5,000|G12|UL, CSA, TÜV|
|RGEF1400|250|—|—|5,000|G14|UL, CSA, TÜV|
|RGEF1400-2|—|1,000|—|5,000|G14|UL, CSA, TÜV|
|RGEF1400-AP|—|—|1,000|5,000|G14|UL, CSA, TÜV|
|**RHEF**|||||||
|**16V - High Temperature**|||||||
|RHEF200|500|—|—|10,000|H2|UL, CSA, TÜV|
|RHEF200-2|—|2,500|—|12,500|H2|UL, CSA, TÜV|
|RHEF200-AP|—|—|2,500|12,500|H2|UL, CSA, TÜV|
|RHEF300|500|—|—|10,000|H3|UL, CSA, TÜV|
|RHEF300-2|—|2,000|—|10,000|H3|UL, CSA, TÜV|
|RHEF300-AP|—|—|2,000|10,000|H3|UL, CSA, TÜV|
|RHEF400|500|—|—|10,000|H4|UL, CSA, TÜV|
|RHEF400-2|—|1,500|—|7,500|H4|UL, CSA, TÜV|
|RHEF400-AP|—|—|1,500|7,500|H4|UL, CSA, TÜV|
|RHEF450|500|—|—|10,000|H4.5|UL, CSA, TÜV|
|RHEF450-2|—|1,500|—|7,500|H4.5|UL, CSA, TÜV|
|RHEF450-AP|—|—|1,500|7,500|H4.5|UL, CSA, TÜV|
|RHEF550|500|—|—|10,000|H5.5|UL, CSA, TÜV|
|RHEF550-2|—|2,000|—|10,000|H5.5|UL, CSA, TÜV|
|RHEF550-AP|—|—|2,000|10,000|H5.5|UL, CSA, TÜV|
|RHEF600|500|—|—|10,000|H6|UL, CSA, TÜV|
|RHEF600-2|—|2,000|—|10,000|H6|UL, CSA, TÜV|
|RHEF600-AP|—|—|2,000|10,000|H6|UL, CSA, TÜV|
|RHEF650|500|—|—|10,000|H6.5|UL, CSA, TÜV|
|RHEF650-2|—|1,500|—|7,500|H6.5|UL, CSA, TÜV|
|RHEF650-AP|—|—|1,500|7,500|H6.5|UL, CSA, TÜV|
|RHEF700|500|—|—|10,000|H7|UL, CSA, TÜV|



Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

RoHS Compliant, ELV Compliant 

**HF** Halogen Free 

## **PolySwitch Resettable Devices** Radial-Leaded Devices 

## Table R6 — Packaging and Marking Information[(Cont’d)] 

**==> picture [528 x 25] intentionally omitted <==**

**----- Start of picture text -----**<br>
Part Bag Tape and Reel  Ammo Pack  Standard Package<br>Number Quantity Quantity Quantity Quantity Part Marking Agency Recognition<br>**----- End of picture text -----**<br>


|**Part**<br>**Number**|**Bag**<br>**Quantity**|**Tape and Reel**<br>**Quantity**|**Ammo Pack**<br>**Quantity**|**Standard Package**<br>**Quantity**|**Part Marking**|**Agency Recognition**|
|---|---|---|---|---|---|---|
|**RHEF**|||||||
|**16V - High Temperature**|||||||
|RHEF700-2|—|1,500|—|7,500|H7|UL, CSA, TÜV|
|RHEF700-AP|—|—|1,500|7,500|H7|UL, CSA, TÜV|
|RHEF750|500|—|—|10,000|H7.5|UL, CSA, TÜV|
|RHEF750-2|—|1,000|—|5,000|H7.5|UL, CSA, TÜV|
|RHEF750-AP|—|—|1,000|5,000|H7.5|UL, CSA, TÜV|
|RHEF800|500|—|—|10,000|H8|UL, CSA, TÜV|
|RHEF800-2|—|1,000|—|5,000|H8|UL, CSA, TÜV|
|RHEF800-AP|—|—|1,000|5,000|H8|UL, CSA, TÜV|
|RHEF900|250|—|—|5,000|H9|UL, CSA, TÜV|
|RHEF900-2|—|1,000|—|5,000|H9|UL, CSA, TÜV|
|RHEF900-AP|—|—|1,000|5,000|H9|UL, CSA, TÜV|
|RHEF1000|250|—|—|5,000|H10|UL, CSA, TÜV|
|RHEF1000-2|—|1,000|—|5,000|H10|UL, CSA, TÜV|
|RHEF1000-AP|—|—|1,000|5,000|H10|UL, CSA, TÜV|
|RHEF1100|250|—|—|5,000|H11|UL, CSA, TÜV|
|RHEF1100-2|—|1,000|—|5,000|H11|UL, CSA, TÜV|
|RHEF1100-AP|—|—|1,000|5,000|H11|UL, CSA, TÜV|
|RHEF1300|250|—|—|5,000|H13|UL, CSA, TÜV|
|RHEF1300-2|—|1,000|—|5,000|H13|UL, CSA, TÜV|
|RHEF1300-AP|—|—|1,000|5,000|H13|UL, CSA, TÜV|
|RHEF1400|250|—|—|5,000|H14|UL, CSA, TÜV|
|RHEF1400-2|—|1,000|—|5,000|H14|UL, CSA, TÜV|
|RHEF1400-AP|—|—|1,000|5,000|H14|UL, CSA, TÜV|
|RHEF1500|250|—|—|5,000|H15|UL, CSA, TÜV|
|RHEF1500-2|—|1,000|—|5,000|H15|UL, CSA, TÜV|
|RHEF1500-AP|—|—|1,000|5,000|H15|UL, CSA, TÜV|
|**RUSBF**|||||||
|**6V**|||||||
|RUSBF075|500|—|—|10,000|R75|UL, CSA, TÜV|
|RUSBF075-2|—|3,000|—|15,000|R75|UL, CSA, TÜV|
|RUSBF075-AP|—|—|2,000|10,000|R75|UL, CSA, TÜV|
|RUSBF120|500|—|—|10,000|R120|UL, CSA, TÜV|
|RUSBF120-2|—|3,000|—|15,000|R120|UL, CSA, TÜV|
|RUSBF120-AP|—|—|2,000|10,000|R120|UL, CSA, TÜV|
|RUSBF155|500|—|—|10,000|R155|UL, CSA, TÜV|
|RUSBF155-2|—|3,000|—|15,000|R155|UL, CSA, TÜV|
|RUSBF155-AP|—|—|2,000|10,000|R155|UL, CSA, TÜV|



## Agency Recognitions 

|UL|File # E74889|
|---|---|
|CSA|File # CA78165|
|TÜV|Certifcate number available on request (per IEC 60730-1).|



Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

RoHS Compliant, ELV Compliant 

**HF** Halogen Free 

**PolySwitch Resettable Devices** Radial-Leaded Devices 

## Table R7 — Tape and Reel Specifications 

RXEF and RKEF devices are available in tape and reel packaging per EIA468-B/IEC60286-2 standards. 

**==> picture [528 x 17] intentionally omitted <==**

**----- Start of picture text -----**<br>
Description EIA Mark Dimension (mm) Tolerance<br>**----- End of picture text -----**<br>


|Carrier Tape Width|W|18|-0.5/+1.0|
|---|---|---|---|
|Hold-Down Tape Width|W4|11|Minimum|
|Top Distance between Tape Edges|W6|3|Maximum|
|Sprocket Hole Position|W5|9|-0.5/+0.75|
|Sprocket Hole Diameter|D0|4|± 0.2|
|Abscissa to Plane (Straight Lead)  (RXEF110 To RXEF300, RKEF135 To RKEF500)|H|18.5|± 2.5|
|Abscissa to Plane (Kinked Lead)  (RXEF010 To RXEF090, RKEF050 To RKEF110)|H0|16.0|± 0.5|
|Abscissa to Top   (RXEF010 To RXEF090, RKEF050 To RKEF185)|H1|32.2|Maximum|
|Abscissa to Top*  (RXEF110 To RXEF300, RKEF250 To RKEF500)|H1|47.5|Maximum|
|Overall Width with Lead Protrusion  (RXEF010 To RXEF090, RKEF050 To RKEF185)|C1|43.2|Maximum|
|Overall Width with Lead Protrusion*  (RXEF110 To RXEF300, RKEF250 To RKEF500)|C1|58|Maximum|
|Overall Width without Lead Protrusion  (RXEF010 To RXEF090, RKEF050 To RKEF185)|C2|42.5|Maximum|
|Overall Width without Lead Protrusion*  (RXEF110 To RXEF300, RKEF250 To RKEF500)|C2|57|Maximum|
|Lead Protrusion|L1|1.0|Maximum|
|Protrusion of Cut-Out|L|11.0|Maximum|
|Protrusion beyond Hold-down Tape|I2|Not Specifed|—|
|Sprocket Hole Pitch|P0|12.7|± 0.3|
|Device Pitch  (RXEF010 To RXEF090, RKEF050 To RKEF185)|—|12.7|± 0.3|
|Device Pitch  (RXEF110 To RXEF300, RKEF250 To RKEF500)|—|25.4|± 0.61|
|Pitch Tolerance|—|20 Consecutive|± 1|
|Tape Thickness|T|0.9|Maximum|
|Overall Tape and Lead Thickness  (RXEF010 To RXEF090, RKEF050 To RKEF185)|T1|1.5|Maximum|
|Overall Tape and Lead Thickness  (RXEF110 To RXEF300, RKEF250 To RKEF500)|T1|2.3|Maximum|
|Splice Sprocket Hole Alignment|—|0|± 0.3|
|Body Lateral Deviation|Dh|0|± 1.0|
|Body Tape Plane Deviation|Dp|0|± 1.3|
|Ordinate to Adjacent Component Lead  (RXEF010 To RXEF185, RKEF050 To RKEF300)|P1|3.81|± 0.7|
|Ordinate to Adjacent Component Lead  (RXEF250 To RXEF300, RKEF375 To RKEF500)|P1|7.62|± 0.7|
|Lead Spacing*  (RXEF010 To RXEF185, RKEF050 To RKEF300)|F|5.05|± 0.75|
|Lead Spacing*  (RXEF250 To RXEF300, RKEF375 To RKEF500)|F|10.15|± 0.75|
|Reel Width  (RXEF010 To RXEF090, RKEF050 To RKEF185)|W2|56.0|Maximum|
|Reel Width*  (RXEF110 To RXEF300, RKEF250 To RKEF500)|W2|63.5|Maximum|
|Reel Diameter|A|370.0|Maximum|
|Space between Flanges*  (RXEF010 To RXEF090, RKEF050 To RKEF185)|W1|48.00|Maximum|
|Space between Flanges*  (RXEF110 To RXEF300, RKEF250 To RKEF500)|W1|55.00|Maximum|
|Arbor Hold Diameter|C|26.0|± 12.0|
|Core Diameter*|N|91.0|Maximum|
|Box|—|64/372/362|Maximum|
|Consecutive Missing Places|—|None|—|
|Empty Places per Reel|—|0.1%|Maximum|



*Differs from EIA specification. 

Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

RoHS Compliant, ELV Compliant 

**HF** Halogen Free 

**PolySwitch Resettable Devices** Radial-Leaded Devices 

## [(Cont’d)] Table R7 — Tape and Reel Specifications 

RUEF and RUSBF devices are available in tape and reel packaging per EIA468–B/IEC60286–2 standards. 

**==> picture [528 x 17] intentionally omitted <==**

**----- Start of picture text -----**<br>
Description EIA Mark Dimension (mm) Tolerance<br>**----- End of picture text -----**<br>


|Carrier Tape Width|W|18|-0.5/+1.0|
|---|---|---|---|
|Hold-down Tape Width|W4|11|Minimum|
|Top Distance between Tape Edges|W6|3|Maximum|
|Sprocket Hole Position|W5|9|-0.5/+0.75|
|Sprocket Hole Diameter|D0|4|± 0.2|
|Abscissa to Plane (Straight Lead)*  (RUEF300 to RUEF900)|H|18.5|± 2.5|
|Abscissa to Plane (Kinked Lead)  (RUSBF075 to RUSBF250, RUEF090 to RUEF250)|H0|16.0|± 0.5|
|Abscissa to Top  (RUSBF075 to RUSBF250, RUEF090 to RUEF300)|H1|32.2|Maximum|
|Abscissa to Top*  (RUEF400 to RUEF900)|H1|45.0|Maximum|
|Overall Width with Lead Protrusion  (RUSBF075 to RUSBF250, RUEF090 to RUEF300)|C1|43.2|Maximum|
|Overall Width with Lead Protrusion  (RUEF400 To RUEF900)|C1|56|Maximum|
|Overall Width without Lead Protrusion  (RUSBF075 to RUSBF250, RUEF090 to RUEF300)|C2|42.5|Maximum|
|Overall Width without Lead Protrusion  (RUEF400 to RUEF900)|C2|56|Maximum|
|Lead Protrusion|L1|1.0|Maximum|
|Protrusion of Cut-out|L|11|Maximum|
|Protrusion beyond Hold-down Tape|I2|Not Specifed|—|
|Sprocket Hole Pitch|P0|12.7|± 0.3|
|Device Pitch  (RUSBF075 to RUSBF250, RUEF090 to RUEF300)|—|12.7|± 0.3|
|Device Pitch  (RUEF400 to RUEF900)|—|25.4|± 0.6|
|Pitch Tolerance|—|20 Consecutive|± 1|
|Tape Thickness|T|0.9|Maximum|
|Overall Tape and Lead Thickness  (RUSBF075 to RUSBF250, RUEF090 to RUEF50)|T1|1.5|Maximum|
|Overall Tape and Lead Thickness*  (RUEF300 to RUEF900)|T1|2.3|Maximum|
|Splice Sprocket Hole Alignment|—|0|± 0.3|
|Body Lateral Deviation|Dh|0|± 1.0|
|Body Tape Plane Deviation|Dp|0|± 1.3|
|Ordinate to Adjacent Component Lead (RUSBF075 to RUSBF250, RUEF090 to RUEF300)|P1|3.81|± 0.7|
|Ordinate to Adjacent Component Lead  (RUEF400 to RUEF900)|P1|7.62|± 0.7|
|Lead Spacing*  (RUSBF075 to RUSBF250, RUEF090 to RUEF400)|F|5.05|± 0.75|
|Lead Spacing*  (RUEF500 to RUEF900)|F|10.15|± 0.75|
|Reel Width  (RUEF090 to RUEF400, Rusbf075 to Rusbf250)|W2|56.0|Maximum|
|Reel Width  (RUEF500* to RUEF900)|W2|63.5|Maximum|
|Reel Diameter|A|370.0|Maximum|
|Space between Flanges*  (RUEF090 to RUEF400, RUSBF075 to RUSBF250)|W1|48.0|Maximum|
|Space between Flanges*  (RUEF500 to RUEF900)|W1|55.0|Maximum|
|Arbor Hold Diameter|C|26.0|± 12.0|
|Core Diameter*|N|91.0|Maximum|
|Box|—|64/372/362|Maximum|
|Consecutive Missing Places|—|None|—|
|Empty Places per Reel|—|0.1%|Maximum|



*Differs from EIA specification. 

Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

RoHS Compliant, ELV Compliant 

**HF** Halogen Free 

**PolySwitch Resettable Devices** Radial-Leaded Devices 

## [(Cont’d)] Table R7 — Tape and Reel Specifications 

RGEF and RHEF devices are available in tape and reel packaging per EIA468–B/IEC60286–2 standards. 

**==> picture [528 x 17] intentionally omitted <==**

**----- Start of picture text -----**<br>
Description EIA Mark Dimension (mm) Tolerance<br>**----- End of picture text -----**<br>


|Carrier Tape Width|W|18|-0.5/+1.0|
|---|---|---|---|
|Hold-Down Tape Width|W4|11|Minimum|
|Top Distance between Tape Edges|W6|3|Maximum|
|Sprocket Hole Position|W5|9|-0.5/+0.75|
|Sprocket Hole Diameter|D0|4|± 0.2|
|Abscissa to Plane (Straight Lead)   (RGEF250 to RGEF1400)|H|18.5|± 2.5|
|Abscissa to Plane (Kinked Lead)   (Rhef050 to RGEF1500)|H0|16.0|± 0.5|
|Abscissa to Top  (RGEF250 to RGEF500, RGEF050 to RGEF450)|H1|32.2|Maximum|
|Abscissa to Top*  (RGEF600 to RGEF1400, RHEF550 to RHEF1500)|H1|45.0|Maximum|
|Overall Width with Lead Protrusion  (RGEF250 to RGEF600, RHEF050 to RHEF450)|C1|43.2|Maximum|
|Overall Width with Lead Protrusion  (RGEF700 to RGEF1400, RHEF550 to RHEF1500)|C1|55|Maximum|
|Overall Width without Lead Protrusion  (RGEF250 to RGEF600, RHEF050 to RHEF450)|C2|42.5|Maximum|
|Overall Width without Lead Protrusion  (RGEF700 to RGEF1400, RHEF550 to RHEF1500)|C2|54|Maximum|
|Lead Protrusion|L1|1.0|Maximum|
|Protrusion of Cut-out|L|11|Maximum|
|Protrusion beyond Hold-down Tape|I2|Not Specifed|—|
|Sprocket Hole Pitch|P0|12.7|± 0.3|
|Device Pitch  (RGEF250 to RGEF700, RHEF050 to RHEF600)|—|25.4|± 0.61|
|Device Pitch  (RGEF800 to RGEF1400, RHEF650 to RHEF1500)|—|25.4|± 0.6|
|Pitch Tolerance|—|20 Consecutive|± 1|
|Tape Thickness|T|0.9|Maximum|
|Overall Tape and Lead Thickness*  (RGEF250 to RGEF1100, RHEF050 to RHEF1100)|T1|2.0|Maximum|
|Overall Tape and Lead Thickness*  (RGEF1200 to RGEF1400, RHEF1300 to RHEF1500)|T1|2.3|Maximum|
|Splice Sprocket Hole Alignment|—|0|± 0.3|
|Body Lateral Deviation|Dh|0|± 1.0|
|Body Tape Plane Deviation|Dp|0|± 1.3|
|Ordinate to Adjacent Component Lead  (RGEF250 to RGEF1100, RHEF050 to RHEF900)|P1|3.81|± 0.7|
|Ordinate to Adjacent Component Lead  (RGEF1200 to RGEF1400, RHEF1000 to RHEF1500)|P1|7.62|± 0.7|
|Lead Spacing*  (RGEF250 to RGEF1100, RHEF050 to RHEF900)|F|5.05|± 0.75|
|Lead Spacing*  (RGEF1200 to RGEF1400, RHEF1000 to RHEF1500)|F|10.15|± 0.75|
|Reel Width  (RGEF250 to RGEF600, RHEF050 to RHEF450)|W2|56.0|Maximum|
|Reel Width*  (RGEF700 to RGEF1400 & RHEF550 to RHEF1500)|W2|63.5|Maximum|
|Reel Diameter|A|370.0|Maximum|
|Space between Flanges*  (RGEF250 to RGEF600, RHEF050 to RHEF450)|W1|48.0|Maximum|
|Space between Flanges*  (RGEF700 to RGEF400, RHEF550 to RHEF1500)|W1|55.0|Maximum|
|Arbor Hold Diameter|C|26.0|± 12.0|
|Core Diameter*|N|91.0|Maximum|
|Box|—|64/372/362|Maximum|
|Consecutive Missing Places|—|None|—|
|Empty Places per Reel|—|0.1%|Maximum|



*Differs from EIA specification. 

Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

RoHS Compliant, ELV Compliant 

**HF** Halogen Free 

**PolySwitch Resettable Devices** Radial-Leaded Devices 

Figure R21 — EIA Referenced Taped Component Dimensions 

**==> picture [381 x 181] intentionally omitted <==**

**----- Start of picture text -----**<br>
�h �h �p �p<br>Reference Plane<br>H1 P1 H1 C2<br>F H C1<br>L A B D4 H0 W5<br>W<br>I2<br>L1 P0 D0 Direction of Unreeling<br>Cross Section A-B<br>t<br>**----- End of picture text -----**<br>


Figure R22 — EIA Referenced Reel Dimensions 

**==> picture [445 x 163] intentionally omitted <==**

**----- Start of picture text -----**<br>
Reel<br>Upper Side<br>n<br>Type<br>a Direction of<br>Unreeling<br>Lower Side<br>c<br>w 1<br>Cross Section<br>w 2<br>Optional Shape: Circular or Polygonal<br>**----- End of picture text -----**<br>


Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

RoHS Compliant, ELV Compliant 

**HF** Halogen Free 

**PolySwitch Resettable Devices** Radial-Leaded Devices 

## Part Numbering System 

**==> picture [375 x 162] intentionally omitted <==**

**----- Start of picture text -----**<br>
RUEF   250   U   2<br>Packaging<br>Blank = Packaged in Bags<br>-1   = 25.4mm (1.0 in) Minimum Lead Length<br>-2   = Tape and Reel<br>-AP  = Ammo Pack<br>-X.X = Special Lead Cut Length (in)<br>Modifier<br>K   = Standard Kinked Lead<br>B   = Special Kinked Lead<br>S   = Straight Lead<br>U   = Uncoated Device<br>Hold Current Indicator<br>Product Series<br>An “F” at the end of product series indicates Pb-free version of product.<br>**----- End of picture text -----**<br>


**Note:** Kinked parts are recommended to control the height of the part on the PCB in non-auto PCB applications. 

## **Warning :** 

- Users should independently evaluate the suitability of and test each product selected for their own application. 

- Operation beyond the maximum ratings or improper use may result in device damage and possible electrical arcing and flame. 

- These devices are intended for protection against damage caused by occasional overcurrent or overtemperature fault conditions and should not be used when repeated fault conditions or prolonged trip events are anticipated. 

- Contamination of the PPTC material with certain silicone-based oils or some aggressive solvents can adversely impact the performance of the devices. 

- Device performance can be impacted negatively if devices are handled in a manner inconsistent with recommended electronic, thermal, and mechanical procedures for electronic components. 

- PPTC devices are not recommended for installation in applications where the device is constrained such that its PTC properties are inhibited, for example in rigid potting materials or in rigid housings, which lack adequate clearance to accommodate device expansion. 

- Operation in circuits with a large inductance can generate a circuit voltage (Ldi/dt) above the rated voltage of the device. 

## **Notice:** 

Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications.  Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, military, aerospace, medical, life-saving, lifesustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation.  Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation.  Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation.  The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. 

Specifications subject to change without notice. ©2016 Littelfuse, Inc. 

RoHS Compliant, ELV Compliant 

**HF** Halogen Free
Updated at June 9, 2026
Founded in 1927 and headquartered in Chicago, Illinois, Littelfuse is a premier global manufacturer of circuit protection, power control, and sensing technologies. Widely recognized for pioneering the first small, fast-acting protective fuse, the company has grown into an industry leader whose highly reliable components are essential to modern industrial, transportation, and consumer electronics applications worldwide. At the core of the Littelfuse portfolio is an expansive and industry-leading range of circuit protection solutions. This encompasses a massive selection of traditional fuses, fuse holders, and resettable PTC thermistor fuses designed to safely interrupt overcurrent conditions. To defend against electrical overstress, Littelfuse also provides advanced transient voltage suppression (TVS) technologies, including thousands of specialized TVS diodes, TVS varistors, and gas discharge tubes (GDTs) that ensure robust defense against voltage spikes and environmental hazards. Beyond its foundational protection components, Littelfuse manufactures a diverse array of discrete semiconductors, sensors, and switching devices. Engineers rely on their high-performance thyristors, including TRIACs and SCRs, alongside power-efficient Schottky diodes and MOSFETs for demanding power control applications. Complemented by precision proximity sensors and highly reliable reed and solid-state relays, Littelfuse delivers the critical building blocks required for secure, efficient, and complete system design.
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