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RUEF135.
FUSE, PTC RESET, 30V, 1.35A, RADIAL
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- Manufacturer: LITTELFUSE
- Product type: Radial Leaded PPTCs
- Product Range:PolySwitch RUEF Series; Voltage Rating:30VDC; Holding Current:1.35A; Trip Current:2.7A; Time to Trip:7.3s; Fuse Shape:Rectangular; Current Rating Max 04H7989
- Height: 13.5mm
- Length: 8.9mm
- Diameter: -
- Thickness: 3mm
- Fuse Shape: Rectangular
- Lead Spacing: 5.8mm
- Time to Trip: 7.3s
- Trip Current: 2.7A
- Product Range: PolySwitch RUEF Series
- Voltage Rating: 30VDC
- Holding Current: 1.35A
- Current Rating Max: 100A
- Operating Temperature Max: 85°C
- Operating Temperature Min: -40°C
- Automotive Qualification Standard: -
| Delivery and price | |
|---|---|
| Units per pack | 1000 |
| Price | 0.193 € |
| Current stock | 200+ |
| Lead time | 30 days |
Datasheet
**PolySwitch[®] Resettable PPTCs** Radial Leaded > RUEF Series RoHS ## RUEF Series ## **Description** Littelfuse PolySwitch radial-leaded devices represent the most comprehensive and complete set of PPTC products available in the industry today. RUEF series is for balance of voltage rating (30V) and hold current (up to 9A). ## **Features** - Resettable and single-use overcurrent devices - Wide range of form factor and termination methods - Devices compatible with high-volume electronics assembly **==> picture [505 x 89] intentionally omitted <==** **----- Start of picture text -----**<br> Agency Approvals • RoHS compliant, Lead-Free and Halogen-Free<br>ee<br>AGENCY AGENCY FILE NUMBER Applications<br>Lo<br>Wk us E74889 • Satellite video receivers • CD-ROMs<br>78165 • Industrial controls • Game machines<br>G.<br>72161784 • Transformers • Battery packs<br>**----- End of picture text -----**<br> ## rN 72161784 **Additional Information** ~~Lo~~ - Computer motherboards - Phones - Modems - Fax machines - USB hubs, ports and • Analog and digital line cards peripherals • Printers • IEEE 1394 ports **==> picture [192 x 8] intentionally omitted <==** **----- Start of picture text -----**<br> Datasheet Resources Samples<br>**----- End of picture text -----**<br> ## **Electrical Characteristics** ~~L~~ O |Part|IH<br>IT<br>VMAX<br>IMAX<br>PD Typ<br>Max Time-to-trip<br>RMIN<br>RMAX<br>R1MAX|Lead Size| |---|---|---| |Number|(A)<br>(A)<br>(VDC)<br>(VAC RMS)<br>(DCADC)<br>(ACARMS)<br>(W)<br>(A)<br>(s)<br>(Ω)<br>(Ω)<br>(Ω)|(mm<br>2/AWG)| |RUEF090<br>RUEF110<br>RUEF135<br>RUEF160<br>RUEF185<br>RUEF250<br>RUEF300<br>RUEF400<br>RUEF500<br>RUEF600<br>RUEF700<br>RUEF800<br>RUEF900|**RUEF – 30V**<br>0.90<br>1.80<br>30<br>30<br>100<br>70<br>0.60<br>4.50<br>5.9<br>0.070<br>0.120<br>0.22<br>0.205/24<br>1.10<br>2.20<br>30<br>30<br>100<br>70<br>0.70<br>5.50<br>6.6<br>0.070<br>0.100<br>0.17<br>0.205/24<br>1.35<br>2.70<br>30<br>30<br>100<br>70<br>0.80<br>6.75<br>7.3<br>0.040<br>0.080<br>0.13<br>0.205/24<br>1.60<br>3.20<br>30<br>30<br>100<br>70<br>0.90<br>8.00<br>8.0<br>0.030<br>0.070<br>0.11<br>0.205/24<br>1.85<br>3.70<br>30<br>30<br>100<br>70<br>1.00<br>9.25<br>8.7<br>0.030<br>0.060<br>0.09<br>0.205/24<br>2.50<br>5.00<br>30<br>30<br>100<br>70<br>1.20<br>12.50<br>10.3<br>0.020<br>0.040<br>0.07<br>0.205/24<br>3.00<br>6.00<br>30<br>30<br>100<br>70<br>2.00<br>15.00<br>10.8<br>0.020<br>0.050<br>0.08<br>0.205/24<br>4.00<br>8.00<br>30<br>30<br>100<br>70<br>2.50<br>20.00<br>12.7<br>0.010<br>0.030<br>0.05<br>0.205/24<br>5.00<br>10.00<br>30<br>30<br>100<br>70<br>3.00<br>25.00<br>14.5<br>0.010<br>0.030<br>0.05<br>0.520/20<br>6.00<br>12.00<br>30<br>30<br>100<br>70<br>3.50<br>30.00<br>16.0<br>0.005<br>0.020<br>0.04<br>0.520/20<br>7.00<br>14.00<br>30<br>30<br>100<br>70<br>3.80<br>35.00<br>17.5<br>0.005<br>0.020<br>0.03<br>0.520/20<br>8.00<br>16.00<br>30<br>30<br>100<br>70<br>4.00<br>40.00<br>18.8<br>0.005<br>0.013<br>0.02<br>0.520/20<br>9.00<br>18.00<br>30<br>30<br>100<br>70<br>4.20<br>45.00<br>20.0<br>0.005<br>0.010<br>0.02<br>0.520/20<br>~~a ee~~<br>~~ee~~<br>~~ee ee ee eee~~<br>~~a a~~<br>~~ee ee~~<br>~~ee ee ee ee eee~~<br>~~a a~~<br>~~ee ee ee~~<br>~~ee ee eee~~<br>~~a es ae ee~~<br>~~ee ee~~<br>~~a se a~~<br>~~ee es~~<br>~~a a~~<br>~~ee eeee~~<br>~~ee ee eee~~<br>~~a a~~<br>~~ee ee ee~~<br>~~eee~~<br>~~Pt~~<br>~~a~~<br>~~ee~~<br>~~ee~~<br>~~ee ee ee eee~~<br>~~a a~~<br>~~ee ee~~<br>~~ee ee ee ee eee~~<br>~~a a~~<br>~~ee~~<br>~~ee ee ee ee eee~~<br>~~a se ee~~<br>~~ee~~<br>~~ee~~|| ## **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. © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 10/22/18 **PolySwitch[®] Resettable PTCs** Radial Leaded > RUEF Series **==> picture [93 x 32] intentionally omitted <==** **==> picture [507 x 275] intentionally omitted <==** **----- Start of picture text -----**<br> Temperature Rerating<br>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>RUEF – 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>**----- End of picture text -----**<br> **==> picture [504 x 217] intentionally omitted <==** **----- Start of picture text -----**<br> Temperature Rerating Curve<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> © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 10/22/18 **PolySwitch[®] Resettable PPTCs** Radial Leaded > RUEF Series **==> picture [94 x 32] intentionally omitted <==** **==> picture [506 x 595] intentionally omitted <==** **----- Start of picture text -----**<br> Typical Time-to-Trip Curves at 20°C<br>RUEF 100<br>A = RUEF090 H = RUEF400 A B [C] D E F G [L] [M]<br>H I J [K]<br>B = RUEF110 I = RUEF500<br>C = RUEF135 J = RUEF600<br>10<br>D = RUEF160 K = RUEF700<br>E = RUEF185 L = RUEF800<br>F = RUEF250 M = RUEF900<br>1 M<br>G = RUEF300<br>L<br>K<br>J<br>I<br>0.1 H<br>[G] F<br>D [E]<br>0.01 1 10 A B C 100<br>Fault Current (A)<br>Physical Specifications<br>RUEF090 to RUEF250: Tin-plated Copper-clad Steel, 0.205mm [2] (24AWG)<br>Lead Material<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, 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>70°C, 1000 hrs ±5%<br>Passive Aging<br>85°C, 1000 hrs ±5%<br>Humidity Aging 85°C, 85% R.H., 1000 hrs ±5%<br>Thermal Shock 85°C to -40°C (10 times) ±5%<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<br>Devices may not meet specified values if these storage conditions are exceeded.<br>Time-to-Trip (s)<br>**----- End of picture text -----**<br> © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 10/22/18 **PolySwitch[®] Resettable PTCs** Radial Leaded > RUEF Series **==> picture [93 x 32] intentionally omitted <==** ## **Dimension Figures** **==> picture [506 x 565] intentionally omitted <==** **----- Start of picture text -----**<br> A E A E<br>B B A<br>C<br>J<br>J E H<br>D<br>D<br>Figure 3 Figure 4<br>C F C F<br>CL to CL CL CL CL to CL CL CL<br>Figure 1 Figure 2<br>Dimensions and Weights<br>Dimensions in Millimeters (Inches)<br>Part A B C D E H J Figure Device Mass (g)<br>Number (Only for Reference)<br>Min Max Min Max Min Max Min Max Min Max Typ Typ<br>RUEF – 30V<br>7.4 12.2 4.3 5.8 7.6 3.0 0.89 0.8<br>RUEF090 — — — — 1,3,4 0.183<br>(0.29) (0.48) (0.17) (0.23) (0.30) (0.12) (0.035) (0.03)<br>7.4 14.2 4.3 5.8 7.6 3.0 0.89 0.8<br>RUEF110 — — — — 1,3,4 0.204<br>( 0.29) (0.56) (0.17) (0.23) (0.30) (0.12) (0.035) (0.03)<br>8.9 13.5 4.3 5.8 7.6 3.0 0.89 1.0<br>RUEF135 — — — — 1,3,4 0.255<br>(0.35) (0.53) (0.17) (0.23) (0.30) (0.12) (0.035) (0.04)<br>8.9 15.2 4.3 5.8 7.6 3.0 0.89 1.0<br>RUEF160 — — — — 1,3,4 0.289<br>(0.35) (0.60) (0.17) (0.23) (0.30) (0.12) (0.035) (0.04)<br>10.2 15.7 4.3 5.8 7.6 3.0 0.89 1.0<br>RUEF185 — — — — 1,3,4 0.379<br>(0.40) (0.62) (0.17) (0.23) (0.30) (0.12) (0.035) (0.04)<br>11.4 18.3 4.3 5.8 7.6 3.0 0.89 1.2<br>RUEF250 — — — — 1,3,4 0.493<br>(0.45) (0.72) (0.17) (0.23) (0.30) (0.12) (0.035) (0.05)<br>11.4 16.5 4.3 5.8 7.6 3.0 1.19 1.5<br>RUEF300 — — — — 2,3,4 0.516<br>(0.45) (0.65) (0.17) (0.23) (0.30) (0.12) (0.047) (0.06)<br>14.0 19.3 4.3 5.8 7.6 3.0 1.19 1.7<br>RUEF400 — — — — 2,3,4 0.670<br>(0.55) (0.76) (0.17) (0.23) (0.30) (0.12) (0.047) (0.07)<br>14.0 24.1 9.4 10.9 7.6 3.0 1.19 1.0<br>RUEF500 — — — — 2,3,4 0.926<br>(0.55) (0.95) (0.37) (0.43) (0.30) (0.12) (0.047) (0.04)<br>16.5 24.1 9.4 10.9 7.6 3.0 1.19 1.0<br>RUEF600 — — — — 2,3,4 1.352<br>(0.65) (0.95) (0.37) (0.43) (0.30) (0.12) (0.047) (0.04)<br>19.1 25.9 9.4 10.9 7.6 3.0 1.19 1.2<br>RUEF700 — — — — 2,3,4 1.543<br>(0.75) (1.02) (0.37) (0.43) (0.30) (0.12) (0.047) (0.05)<br>21.6 28.4 9.4 10.9 7.6 3.0 1.19 1.5<br>RUEF800 — — — — 2,3,4 1.852<br>(0.85) (1.12) (0.37) (0.43) (0.30) (0.12) (0.047) (0.06)<br>24.1 29.0 9.4 10.9 7.6 3.0 1.19 1.5<br>RUEF900 — — — — 2,3,4 2.104<br>(0.95) (1.14) (0.37) (0.43) (0.30) (0.12) (0.047) (0.06)<br>**----- End of picture text -----**<br> © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 10/22/18 **PolySwitch[®] Resettable PPTCs** Radial Leaded > RUEF Series **==> picture [94 x 32] intentionally omitted <==** ## **Packaging and Marking Information** **==> picture [506 x 600] intentionally omitted <==** **----- 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>RUEF – 30V<br>RUEF090 500 — — 10,000 U90 UL, CSA, TÜV, CQC<br>RUEF090-2 — 3,000 — 15,000 U90 UL, CSA, TÜV, CQC<br>RUEF090-AP — — 2,000 10,000 U90 UL, CSA, TÜV, CQC<br>RUEF110 500 — — 10,000 U110 UL, CSA, TÜV, CQC<br>RUEF110-2 — 3,000 — 15,000 U110 UL, CSA, TÜV, CQC<br>RUEF110-AP — — 2,000 10,000 U110 UL, CSA, TÜV, CQC<br>RUEF135 500 — — 10,000 U135 UL, CSA, TÜV, CQC<br>RUEF135-2 — 3,000 — 15,000 U135 UL, CSA, TÜV, CQC<br>RUEF135-AP — — 2,000 10,000 U135 UL, CSA, TÜV, CQC<br>RUEF160 500 — — 10,000 U160 UL, CSA, TÜV, CQC<br>RUEF160-2 — 3,000 — 15,000 U160 UL, CSA, TÜV, CQC<br>RUEF160-AP — — 2,000 10,000 U160 UL, CSA, TÜV, CQC<br>RUEF185 500 — — 10,000 U185 UL, CSA, TÜV, CQC<br>RUEF185-2 — 3,000 — 15,000 U185 UL, CSA, TÜV, CQC<br>RUEF185-AP — — 2,000 10,000 U185 UL, CSA, TÜV, CQC<br>RUEF250 500 — — 10,000 U250 UL, CSA, TÜV, CQC<br>RUEF250-2 — 3,000 — 15,000 U250 UL, CSA, TÜV, CQC<br>RUEF250-AP — — 2,000 10,000 U250 UL, CSA, TÜV, CQC<br>RUEF300 500 — — 10,000 U300 UL, CSA, TÜV, CQC<br>RUEF300-2 — 2,500 — 12,500 U300 UL, CSA, TÜV, CQC<br>RUEF300-AP — — 1,000 5,000 U300 UL, CSA, TÜV, CQC<br>RUEF400 500 — — 10,000 U400 UL, CSA, TÜV, CQC<br>RUEF400-2 — 1,500 — 7,500 U400 UL, CSA, TÜV, CQC<br>RUEF400-AP — — 1,000 5,000 U400 UL, CSA, TÜV, CQC<br>RUEF500 250 — — 5,000 U500 UL, CSA, TÜV, CQC<br>RUEF500-2 — 1,500 — 7,500 U500 UL, CSA, TÜV, CQC<br>RUEF500-AP — — 1,000 5,000 U500 UL, CSA, TÜV, CQC<br>RUEF600 250 — — 5,000 U600 UL, CSA, TÜV, CQC<br>RUEF600-2 — 1,000 — 5,000 U600 UL, CSA, TÜV, CQC<br>RUEF600-AP — — 1,000 5,000 U600 UL, CSA, TÜV, CQC<br>RUEF700 250 — — 5,000 U700 UL, CSA, TÜV, CQC<br>RUEF700-2 — 1,000 — 5,000 U700 UL, CSA, TÜV, CQC<br>RUEF700-AP — — 1,000 5,000 U700 UL, CSA, TÜV, CQC<br>RUEF800 250 — — 5,000 U800 UL, CSA, TÜV, CQC<br>RUEF800-2 — 1,000 — 5,000 U800 UL, CSA, TÜV, CQC<br>RUEF800-AP — — 1,000 5,000 U800 UL, CSA, TÜV, CQC<br>RUEF900 250 — — 5,000 U900 UL, CSA, TÜV, CQC<br>RUEF900-2 — 1,000 — 4,000 U900 UL, CSA, TÜV, CQC<br>RUEF900-AP — — 1,000 4,000 U900 UL, CSA, TÜV, CQC<br>**----- End of picture text -----**<br> © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 10/22/18 **PolySwitch[®] Resettable PTCs** Radial Leaded > RUEF Series **==> picture [93 x 32] intentionally omitted <==** ## **Part Ordering Number System** ## **RUEF 250 U 2** **==> picture [117 x 142] intentionally omitted <==** **==> picture [240 x 134] intentionally omitted <==** **----- Start of picture text -----**<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. © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 10/22/18 **PolySwitch[®] Resettable PPTCs** Radial Leaded > RUEF Series **==> picture [94 x 32] intentionally omitted <==** ## **Tape and Reel Specifications** RUEF devices are available in tape and reel packaging per EIA468–B/IEC60286–2 standards. See Figures 1 and 2 for details. **==> picture [506 x 545] 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 W0 4 ± 0.2<br>Abscissa to Plane (Straight Lead)* (RUEF300 to RUEF900) H 18.5 ± 2.5<br>Abscissa to Plane (Kinked Lead) (RUEF090 to RUEF250) H0 16.0 ± 0.5<br>Abscissa to Top (RUEF090 to RUEF300) H1 32.2 Maximum<br>Abscissa to Top* (RUEF400 to RUEF900) H1 45.0 Maximum<br>Overall Width with Lead Protrusion (RUEF090 to RUEF300) C1 43.2 Maximum<br>Overall Width with Lead Protrusion (RUEF400 To RUEF900) C1 56 Maximum<br>Overall Width without Lead Protrusion (RUEF090 to RUEF300) C2 42.5 Maximum<br>Overall Width without Lead Protrusion (RUEF400 to RUEF900) C2 56 Maximum<br>Lead Protrusion L1 1.0 Maximum<br>Protrusion of Cut-out L 11 Maximum<br>Protrusion beyond Hold-down Tape I2 Not Specified —<br>Sprocket Hole Pitch P0 12.7 ± 0.3<br>Device Pitch (RUEF090 to RUEF300) — 12.7 ± 0.3<br>Device Pitch (RUEF400 to RUEF900) — 25.4 ± 0.6<br>Pitch Tolerance — 20 Consecutive ± 1<br>Tape Thickness T 0.9 Maximum<br>Overall Tape and Lead Thickness (RUEF090 to RUEF50) T1 1.5 Maximum<br>Overall Tape and Lead Thickness* (RUEF300 to RUEF900) T1 2.3 Maximum<br>Splice Sprocket Hole Alignment — 0 ± 0.3<br>Body Lateral Deviation Dh 0 ± 1.0<br>Body Tape Plane Deviation Dp 0 ± 1.3<br>Ordinate to Adjacent Component Lead (RUEF090 to RUEF300) P1 3.81 ± 0.7<br>Ordinate to Adjacent Component Lead (RUEF400 to RUEF900) P1 7.62 ± 0.7<br>Lead Spacing* (RUEF090 to RUEF400) F 5.05 ± 0.75<br>Lead Spacing* (RUEF500 to RUEF900) F 10.15 ± 0.75<br>Reel Width (RUEF090 to RUEF400) W2 56.0 Maximum<br>Reel Width (RUEF500* to RUEF900) W2 63.5 Maximum<br>Reel Diameter A 370.0 Maximum<br>Space between Flanges* (RUEF090 to RUEF400) W1 48.0 Maximum<br>Space between Flanges* (RUEF500 to RUEF900) 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. © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 10/22/18 **PolySwitch[®] Resettable PTCs** Radial Leaded > RUEF Series **==> picture [93 x 32] intentionally omitted <==** ## **Tape and Reel Diagrams** **==> picture [447 x 369] 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>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. © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 10/22/18
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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