RXEF030.

FUSE, PTC RESET, 72V, 300mA, RADIAL

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Manufacturer: LITTELFUSE
Product type: Radial Leaded PPTCs
Product Range:PolySwitch RXEF Series; Voltage Rating:72VDC; Holding Current:300mA; Trip Current:600mA; Time to Trip:3s; Fuse Shape:Round; Current Rating Max:40A; Lead Spacing:5.8mm; D
Height: 12.7mm
Length: -
Diameter: 7.4mm
Thickness: 3mm
Fuse Shape: Round
Lead Spacing: 5.8mm
Time to Trip: 3s
Trip Current: 600mA
Product Range: PolySwitch RXEF Series
Voltage Rating: 72VDC
Holding Current: 300mA
Current Rating Max: 40A
Operating Temperature Max: 85°C
Operating Temperature Min: -40°C
Automotive Qualification Standard: -

Delivery and price
Units per pack	1000
Price	0.171 €
Current stock	10+
Lead time	30 days

Datasheet

PPTC **Datasheet** 

**RXEF Series** Radial Leaded 

## RoHS HFJ@OWGA 

## **Description** 

Littelfuse PolySwitch radial-leaded devices represent the most comprehensive and complete set of PPTC products available in the industry today. RXEF series offers low hold currents (down to 50mA) and high voltage rating (up to 72V). 

## **Features & Benefits** 

- Resettable and single-use overcurrent devices 

- Wide range of form factor and termination methods 

- Devices compatible with high-volume electronics assembly 

- RoHS compliant, Lead-Free and Halogen-Free 

- UL Recognized to UL 1434 

- CSA Approved to CSA TIL No. CA-3A 

## **Additional Information** 

- TUV Approved to EN 60730-1 

- CQC Approved to GB 8898, GB/T 7153, GB 14536.1 

## **Applications** 

- Satellite video receivers ■ CD-ROMs 

- Industrial controls ■ Game machines 

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Resources Accessories Samples<br>**----- End of picture text -----**<br>


## **Agency Approvals** 

|**Agency**<br>Ww|**Agency File/Certificate Number**<br>E74889|
|---|---|
|6.|78165|
|~~)~~|16001159722|
|~~A~~|72161785|



- Transformers 

   - Battery packs 

- Computer motherboards 

   - Phones 

- Modems ■ Fax machines 

- USB hubs, ports and ■ Analog and digital line cards peripherals ■ Printers 

- IEEE 1394 ports 

## **Electrical Characteristics** 

|**Part**|**Ordering Part**|**IH**|**IT**|**VMAX**|**VMAX**|**IMAX**|**IMAX**|**PD Typ**|**Max Time-to-trip**|**Max Time-to-trip**|**RMIN**|**RMAX**|**R1MAX**|**Lead Size**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|**Number**|**Number**|**(A)**|**(A)**|**(VDC)**|**(VAC RMS)**|**(DCADC)**|**(ACARMS)**|**(W)**|**(A)**|**(s)**|**(Ω)**|**(Ω)**|**(Ω)**|**(mm**<br>**2/AWG)**|
||||||||**RXEF – 60V**||||||||
|RXEF005|RF2577-000|0.05|0.10|60|–|40|–|0.22|0.25|5.0|7.3|11.10|20.00|0.128/26|
|RXEF010|RF2579-000|0.10|0.20|60|–|40|–|0.38|0.50|4.0|2.5|4.50|7.50|0.205/24|
|RXEF017|RF2563-000|0.17|0.34|60|–|40|–|0.48|0.85|3.0|3.3|5.21|8.00|0.205/24|



## **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. 

© 2022 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 09/21/22 

**1** 

PPTC **Datasheet** 

**RXEF Series** Radial Leaded 

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## **Electrical Characteristics** (Cont’d) 

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Part   Ordering Part IH IT VMAX IMAX PD Typ Max Time-to-trip RMIN RMAX R1MAX Lead Size<br>Number Number (mm2/AWG)<br>(A) (A) (VDC) (VAC RMS) (DCADC) (ACARMS) (W) (A) (s) (Ω) (Ω) (Ω)<br>RXEF – 72V<br>RXEF020 RF2564-000 0.20 0.40 72 72 40 40 0.41 1.00 2.2 1.83 2.75 4.40 0.205/24<br>RXEF025 RF2628-000 0.25 0.50 72 72 40 40 0.45 1.25 2.5 1.25 1.95 3.00 0.205/24<br>RXEF030 RF2565-000 0.30 0.60 72 72 40 40 0.49 1.50 3.0 0.88 1.33 2.10 0.205/24<br>RXEF040 RF2566-000 0.40 0.80 72 72 40 40 0.56 2.00 3.8 0.55 0.86 1.29 0.205/24<br>RXEF050 RF2567-000 0.50 1.00 72 72 40 40 0.77 2.50 4.0 0.50 0.77 1.17 0.205/24<br>RXEF065 RF2568-000 0.65 1.30 72 72 40 40 0.88 3.25 5.3 0.31 0.48 0.72 0.205/24<br>RXEF075 RF2569-000 0.75 1.50 72 72 40 40 0.92 3.75 6.3 0.25 0.40 0.60 0.205/24<br>RXEF090 RF2571-000 0.90 1.80 72 72 40 40 0.99 4.50 7.2 0.20 0.31 0.47 0.205/24<br>RXEF110 RF2623-000 1.10 2.20 72 72 40 40 1.50 5.50 8.2 0.15 0.25 0.38 0.520/20<br>RXEF135 RF2640-000 1.35 2.70 72 72 40 40 1.70 6.75 9.6 0.12 0.19 0.30 0.520/20<br>RXEF160 RF2637-000 1.60 3.20 72 72 40 40 1.90 8.00 11.4 0.09 0.14 0.22 0.520/20<br>RXEF185 RF2635-000 1.85 3.70 72 72 40 40 2.10 9.25 12.6 0.08 0.12 0.19 0.520/20<br>RXEF250 RF2649-000 2.50 5.00 72 72 40 40 2.50 12.50 15.6 0.05 0.08 0.13 0.520/20<br>RXEF300 RF2650-000 3.00 6.00 72 72 40 40 2.80 15.00 19.8 0.04 0.06 0.10 0.520/20<br>RXEF375 RF2647-000 3.75 7.50 72 72 40 40 3.20 18.75 24.0 0.03 0.05 0.08 0.520/20<br>**----- End of picture text -----**<br>


## **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. 

## **Typical Time-to-Trip Curves at 20°C** 

|**RXEF**<br>A =<br>RXEF005<br>B =<br>RXEF010<br>C =<br>RXEF017<br>D =<br>RXEF020<br>E =<br>RXEF025<br>F =<br>RXEF030<br>G =<br>RXEF040<br>H =<br>RXEF050<br>I<br>=<br>RXEF065<br>J =<br>RXEF075<br>K =<br>RXEF090<br>L =<br>RXEF110<br>M =<br>RXEF135<br>N =<br>RXEF160<br>O =<br>RXEF185<br>P =<br>RXEF250<br>Q =<br>RXEF300<br>R =<br>RXEF375<br>**Time-to-Trip (s)**<br>1000<br>100<br>10<br>1<br>0.1<br>0.01<br>0.001<br>0<br>A|**Fault Current (A)**<br>.1<br>10<br>1<br>100<br><br>A<br>B<br>C D E F<br>G<br>B<br>C D E F G H<br>H<br>I<br>J<br>K<br>L<br>M<br>NO<br>P<br>Q<br>R<br>I J K L MNO P Q R|
|---|---|



© 2022 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 09/21/22 

**2** 

PPTC **Datasheet** 

**RXEF Series** Radial Leaded 

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## **Temperature Rerating** 

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Maximum Ambient Temperature<br>-40°C  -20°C  0°C  20°C   25°C  40°C 50°C 60°C 70°C 85°C<br>Hold Current (A)<br>RXEF – 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 – 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>


## **Temperature Rerating Curve** 

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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>


© 2022 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 09/21/22 

**3** 

PPTC **Datasheet** 

**RXEF Series** Radial Leaded 

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## **Physical Specifications** 

||**Physical Specifcations**|
|---|---|
|**Lead Material**|RXEF005: Tin-plated Nickel-copper Alloy, 0.128mm2(26AWG), ø0.40mm (0.016in)<br>RXEF010: Tin-plated Nickel-copper Alloy, 0.205mm2(24AWG), ø0.51mm (0.020in)<br>RXEF017 to 040: Tin-plated Copper-clad Steel, 0.205mm2(24AWG), ø0.51mm (0.020in)<br>RXEF050 to 090 : Tin-plated Copper, 0.205mm2(24AWG), ø0.51mm (0.020in)<br>RXEF110 to 375: Tin-plated Copper, 0.52mm2(20AWG), ø0.81mm (0.032in)|
|**Soldering Characteristics**|Solderability per ANSI/J-STD-002 Category 3<br>RXEF005, RXEF010 Meet ANSI/J-STD-002 Category 1|
|**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|
|**Insulating Material**|Cured, Flame-retardant Epoxy Polymer; Meets UL 94V-0|
|**Operation Temperature**|-40°C~85°C|



**Note:** Devices are not designed to be placed through a reflow process. 

## **Environmental Specifications** 

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Test Conditions Resistance Change<br>-40°C, 1000 hrs ±5%<br>Passive Aging<br>85°C, 1000 hrs ±5%<br>Humidity Aging 85°C, 85% R.H., 1000 hrs ±10%<br>Thermal Shock 85°C to -40°C 10 times ±10%<br>Solvent Resistance MIL-STD-202, Method 215F No change<br>Moisture Resistance Level Level 1, J-STD-020<br>40°C max, 70% RH max; devices should remain in original sealed bags prior to use.<br>Storage Conditions  Devices may not meet specified values if these storage conditions are exceeded.<br>**----- End of picture text -----**<br>


© 2022 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 09/21/22 

**4** 

~~P~~ PTC **Datasheet** 

**RXEF Series** Radial Leaded 

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## **Dimension Figures** 

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A E A E A E<br>J<br>B J<br>B<br>B<br>Figure 4<br>D<br>D<br>D<br>A<br>C<br>C F C F C F<br>CL to CL CL CL CL to CL CL CL CL to CL CL CL<br>E H<br>Figure 1 Figure 2 Figure 3<br>**----- End of picture text -----**<br>


**Figure 5** 

## **Dimensions and Weights** 

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Dimensions in Millimeters (Inches)<br>NumberPart  A B C D E H J Figure (Only for Reference)Device Mass (g)<br>Min Max Min Max Min Max Min Max Min Max Typ Typ<br>R XEF  – 60V<br>8.0 8.3 4.3  5.8  7.6  3.0  1.07 1.0<br>RXEF005  — — — — 1,4,5 0.069<br>(0.32) (0.33) (0.17) (0.23) (0.30) (0.12) (0.042) (0.04)<br>7.4  11.6  4.3  5.8 7.6  3.0  1.07 1.0<br>RXEF010  —  —  —  —  2,4,5 0.128<br>(0.29) (0.46) (0.17) (0.23) (0.30) (0.12) (0.042) (0.04)<br>7.4  12.7 4.3  5.8  7.6  3.0 1.68 1.7<br>RXEF017  —  —  —  —  2,4,5 0.174<br>(0.29) (0.50) (0.17) (0.23) (0.30) (0.12) (0.066) (0.07)<br>RXEF – 72V<br>7.4  11.7  4.3  5.8  7.6  3.0   1.17 1.0<br>RXEF020  —  —  —  —  2,4,5 0.119<br>(0.29) (0.46) (0.17) (0.23) (0.30) (0.12) (0.046) (0.04)<br>7.4  12.7  4.3  5.8 7.6  3.0   1.17 1.0<br>RXEF025  —  —  —  — 2,4,5 0.130<br>(0.29) (0.50) (0.17) (0.23) (0.30) (0.12) (0.046) (0.04)<br>7.4  12.7  4.3  5.8 7.6  3.0  1.17 1.0<br>RX E F03 0  — —  —  —  2,4,5 0.143<br>(0.29) (0.50) (0.17) (0.23) (0.30)  (0.12) (0.046) (0.04)<br>7.6  13.5  4.3  5.8  7.6  3.0  1.17 1.2<br>RXEF040  —  —  —  —  2,4,5 0.202<br>(0.30) (0.53) (0.17) (0.23) (0.30) (0.12) (0.046) (0.05)<br>7.9  13.7  4.3  5.8  7.6  3.0 1.17 1.2<br>RXEF050  —  —  —  —  2,4,5 0.210<br>(0.31) (0.54) (0.17) (0.23) (0.30) (0.12) (0.046) (0.05)<br>9.4  14.5  4.3  5.8 7.6  3.0  1.17 1.5<br>RXEF065  —  —  —  —  2,4,5 0.277<br>(0.37) (0.57) (0.17) (0.23) (0.30) (0.12) (0.046) (0.06)<br>10.2  15.2  4.3  5.8 7.6  3.0  1.17 1.5<br>RXEF075  —  —  —  —  2,4,5 0.310<br>(0.40) (0.60) (0.17) (0.23) (0.30) (0.12) (0.046) (0.06)<br>11.2  15.8  4.3  5.8 7.6  3.0 1.17 1.5<br>RXEF090  —  —  —  —  2,4,5 0.365<br>(0.44) (0.62) (0.17) (0.23) (0.30) (0.12) (0.046) (0.06)<br>**----- End of picture text -----**<br>


© 2022 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 09/21/22 

**5** 

~~P~~ PTC **Datasheet** 

**RXEF Series** Radial Leaded 

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## **Dimension Figures** 

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A E A E A E<br>J<br>B J<br>B<br>B<br>Figure 4<br>D<br>D<br>D<br>A<br>C<br>C F C F C F<br>CL to CL CL CL CL to CL CL CL CL to CL CL CL<br>E H<br>Figure 1 Figure 2 Figure 3<br>**----- End of picture text -----**<br>


**Figure 5** 

**Dimensions and Weights** (Cont’d) 

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Dimensions in Millimeters (Inches)<br>NumberPart  A B C D E H J Figure (Only for Reference)Device Mass (g)<br>Min Max Min Max Min Max Min Max Min Max Typ Typ<br>R XEF  – 72V<br>12.8  17.5  4.3  5.8  7.6  3.0  1.37 1.2<br>RXEF110  —  —  —  —  3,4,5 0.546<br>(0.50) (0.69) (0.17) (0.23) (0.30) (0.12) (0.054) (0.05)<br>14.5  19.1  4.3  5.8 7.6  3.0 1.37 1.2<br>RXEF135  —  —  —  —  3,4,5 0.653<br>(0.57) (0.75) (0.17) (0.23) (0.30) (0.12) (0.054) (0.05)<br>16.3 20.8 4.3  5.8 7.6  3.0   1.37 1.5<br>RXEF160  —  —  —  —  3,4,5 0.684<br>(0.64) (0.82) (0.17) (0.23) (0.30) (0.12) (0.054) (0.06)<br>17.5  22.4  4.3  5.8 7.6  3.0  1.37 1.5<br>RXEF185  —  —  —  —  3,4,5 0.808<br>(0.69) (0.88) (0.17) (0.23) (0.30) (0.12) (0.054) (0.06)<br>20.8  25.4  9.4  10.9 7.6  3.0  1.37 1.7<br>RXEF250  — —  —  —  3,4,5 1.139<br>(0.82) (1.00) (0.37) (0.43) (0.30) (0.12) (0.054) (0.07)<br>23.9  28.6  9.4  10.9 7.6  3.0 1.37 1.7<br>RXEF300  —  —  —  —  3,4,5 1.379<br>(0.94) (1.13) (0.37) (0.43) (0.30)  (0.12) (0.054) (0.07)<br>27.2  31.8  9.4  10.9 7.6  3.0   1.37 1.7<br>RXEF375  —  —  —  —  3,4,5 1.708<br>(1.07) (1.25) (0.37) (0.43) (0.30) (0.12) (0.054) (0.07)<br>**----- End of picture text -----**<br>


© 2022 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 09/21/22 

**6** 

PPTC **Datasheet** 

**RXEF Series** Radial Leaded 

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## **Packaging and Marking Information** 

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


© 2022 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 09/21/22 

**7** 

PPTC **Datasheet** 

**RXEF Series** Radial Leaded 

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## **Packaging and Marking Information** (Cont’d) 

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**----- Start of picture text -----**<br>
Part Bag Tape and Reel   Ammo Pack   Standard Package  Part   Agency<br>Number Quantity Quantity Quantity Quantity Marking Recognition<br>RXEF – 72V<br>RXEF135 500 — — 10,000 X135 UL, CSA, TÜV, CQC<br>RXEF135-2 — 1,500 — 7,500 X135 UL, CSA, TÜV, CQC<br>RXEF135-AP — — 1,000 5,000 X135 UL, CSA, TÜV, CQC<br>RXEF160 500 — — 10,000 X160 UL, CSA, TÜV, CQC<br>RXEF160-2 — 1,500 — 7,500 X160 UL, CSA, TÜV, CQC<br>RXEF160-AP — — 1,000 5,000 X160 UL, CSA, TÜV, CQC<br>RXEF185 500 — — 10,000 X185 UL, CSA, TÜV, CQC<br>RXEF185-2 — 1,500 — 7,500 X185 UL, CSA, TÜV, CQC<br>RXEF185-AP — — 1,000 5,000 X185 UL, CSA, TÜV, CQC<br>RXEF250 250 — — 5,000 X250 UL, CSA, TÜV, CQC<br>RXEF250-2 — 1,000 — 5,000 X250 UL, CSA, TÜV, CQC<br>RXEF250-AP — — 1,000 5,000 X250 UL, CSA, TÜV, CQC<br>RXEF300 250 — — 5,000 X300 UL, CSA, TÜV, CQC<br>RXEF300-2 — 1,000 — 5,000 X300 UL, CSA, TÜV, CQC<br>RXEF300-AP — — 1,000 5,000 X300 UL, CSA, TÜV, CQC<br>RXEF375 250 — — 5,000 X375 UL, CSA, TÜV, CQC<br>**----- End of picture text -----**<br>


## **Part Ordering Number System** 

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**----- Start of picture text -----**<br>
RXEF   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. 

© 2022 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 09/21/22 

**8** 

PPTC **Datasheet** 

**RXEF Series** Radial Leaded 

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## **Tape and Reel Specifications** 

RXEF devices are available in tape and reel packaging per EIA468-B/IEC60286-2 standards. See Figures 1 and 2 for details. 

**==> picture [506 x 564] intentionally omitted <==**

**----- Start of picture text -----**<br>
Description EIA Mark Dimension (mm) Tolerance<br>Carrier Tape Width W 18 -0.5/+1.0<br>Hold-Down Tape Width W4 11 Minimum<br>Top Distance between Tape Edges W6 3 Maximum<br>Sprocket Hole Position W5 9 -0.5/+0.75<br>Sprocket Hole Diameter D0 4 ± 0.2<br>Abscissa to Plane (Straight Lead) (RXEF110 To RXEF300) H 18.5 ± 2.5<br>Abscissa to Plane (Kinked Lead) (RXEF010 To RXEF090) H0 16.0 ± 0.5<br>Abscissa to Top (RXEF010 To RXEF090) H1 32.2 Maximum<br>Abscissa to Top* (RXEF110 To RXEF300) H1 47.5 Maximum<br>Overall Width with Lead Protrusion (RXEF010 To RXEF090) C1 43.2 Maximum<br>Overall Width with Lead Protrusion* (RXEF110 To RXEF300) C1 58 Maximum<br>Overall Width without Lead Protrusion (RXEF010 To RXEF090) C2 42.5 Maximum<br>Overall Width without Lead Protrusion* (RXEF110 To RXEF300) C2 57.0 Maximum<br>Lead Protrusion L1 1.0 Maximum<br>Protrusion of Cut-Out L 11.0 Maximum<br>Protrusion beyond Hold-down Tape I2 Not Specified —<br>Sprocket Hole Pitch P0 12.7 ± 0.3<br>Device Pitch (RXEF010 To RXEF090) — 12.7 ± 0.3<br>Device Pitch (RXEF110 To RXEF300) — 25.4 ± 0.61<br>Pitch Tolerance — 20 Consecutive ± 1<br>Tape Thickness T 0.9 Maximum<br>Overall Tape and Lead Thickness (RXEF010 To RXEF090) T1 1.5 Maximum<br>Overall Tape and Lead Thickness (RXEF110 To RXEF300) T1 2.3 Maximum<br>Splice Sprocket Hole Alignment — 0 ± 0.3<br>Body Lateral Deviation h 0 ± 1.0<br>Body Tape Plane Deviation p 0 ± 1.3<br>Ordinate to Adjacent Component Lead  (RXEF010 To RXEF185) P1 3.81 ± 0.7<br>Ordinate to Adjacent Component Lead  (RXEF250 To RXEF300)  P1 7.62 ± 0.7<br>Lead Spacing*  (RXEF010 To RXEF185) F 5.05 ± 0.75<br>Lead Spacing*  (RXEF250 To RXEF300) F 10.15 ± 0.75<br>Reel Width  (RXEF010 To RXEF090) W2 56.0 Maximum<br>Reel Width*  (RXEF110 To RXEF300) W2 63.5 Maximum<br>Reel Diameter A 370.0 Maximum<br>Space between Flanges*  (RXEF010 To RXEF090) W1 48.0 Maximum<br>Space between Flanges*  (RXEF110 To RXEF300) W1 55.0 Maximum<br>Arbor Hold Diameter C 26.0 ± 12.0<br>Core Diameter* N 91.0 Maximum<br>Box — 64/372/362 Maximum<br>Consecutive Missing Places — None —<br>Empty Places per Reel — 0.1% Maximum<br>**----- End of picture text -----**<br>


*Differs from EIA specification. 

© 2022 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 09/21/22 

**9** 

PPTC **Datasheet** 

**RXEF Series** Radial Leaded 

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## **Tape and Reel Diagrams** 

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**----- 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>Figure 1 Cross Section A-B<br>t<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>Figure 2<br>**----- End of picture text -----**<br>


## **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. 

**Disclaimer 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 may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/disclaimer-electronics. 

© 2022 Littelfuse, Inc. Specifications are subject to change without notice. Revised: GD. 09/21/22 

**10**

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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