# Resettable Fuse, PPTC, 3729 (9474 Metric), PolySwitch 250S Series, 60 VDC, 130 mA, 260 mA, 0.9 s

![Product image](https://novapart.co/image/farnell:2786594/)

**URL**: https://novapart.co/products/250S130DR/resettable-fuse-pptc-3729-9474-metric-polyswitch
**SKU**: 250S130DR
**Manufacturer**: LITTELFUSE
**Category**: Circuit Protection || Thermistors || Resettable Fuses || Surface Mount PPTCs
**Price**: €0.3970
**Stock**: 10+
**Lead Time**: 99 days (indicative)

## Description

Thermistor Mounting:SMD; Product Range:POLY-FUSE 250S Series; Holding Current:130mA; Tripping Current:260mA; Voltage Rating:60V; Operating Temperature Min:-40°C; Operating Temperatu

## Specifications

| Parameter | Value |
|---|---|
| Svhc | To Be Advised |
| Time To Trip | 0.9s |
| Trip Current | 260mA |
| Product Range | PolySwitch 250S Series |
| Voltage Rating | 60VDC |
| Holding Current | 130mA |
| Pptc Case Style | 3729 (9474 Metric) |
| Current Rating Max | 3A |
| Thermistor Mounting | SMD |
| Operating Temperature Max | 85°C |
| Operating Temperature Min | -40°C |
| Automotive Qualification Standard | - |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:2786594/)

**POLY-FUSE® Resettable PTCs** Surface Mount > 250S Series 

**RoH** ~~**S** HF (__]@ .aa.. 4~~ 

## 250S Series 

## **Description** 

The 250S High Voltage Radial device is a Polymer-based PTC suitable to protect telephony equipment against lightining and power cross strikes. The 250S Series is fully compatible with telecommunications standards, and is offered in horizontal and new vertical surface mount package. 

## **Features** 

## **Agency Approvals** 

|AGENCY|AGENCY FILE NUMBER|
|---|---|
||E183209|
|a|R50120008|



- RoHS Compliant, Directive 2002/95/EC 

   - Helps meets ITU K.20, K.21/Telcordia standards 

- Lead-Free & Halogen-Free 

   - Excellent solder joint inspectability 

- Low resistance 

- Compatible with telecom •  High voltage standards 

## **Applications** 

- Customer Premises • LAN/WAN equipment Equipment (CPE) • Access equipment 

- Central Office (CO)/ telecom centers 

## **Electrical Characteristics** 

|Part Number|Device<br>Mounting<br>Layout|Ihold<br>(A)<br>Itrip<br>(A)<br>Vmax<br>(Vint/Vop)<br>Imax<br>(A)<br>Pdtyp.<br>(W)<br>Time to Trip at 1A<br>Resistance<br>Typical<br>(Sec.)<br>Maximum<br>(Sec.)<br>Rmin<br>(Ω)<br>Rmax<br>(Ω)<br>R1max<br>(Ω)|Agency<br>Approvals<br>cds|
|---|---|---|---|
|250S130<br>250S130–RA<br>250S130–RB<br>250S130–RC<br>250S130V|Horizontal<br>Vertical<br>~~a~~|0.13<br>0.26<br>250/60<br>3<br>1.2<br>0.9<br>4.0<br>4<br>13<br>20<br>–<br>0.13<br>0.26<br>250/60<br>3<br>1.2<br>1.4<br>4.0<br>6.5<br>10<br>15<br>–<br>0.13<br>0.26<br>250/60<br>3<br>1.2<br>0.7<br>4.0<br>9<br>13<br>20<br>–<br>0.13<br>0.26<br>250/60<br>3<br>1.2<br>1.1<br>4.0<br>7<br>11<br>17<br>–<br>0.13<br>0.26<br>250/60<br>3<br>1.2<br>2.0<br>4.0<br>4<br>13<br>20<br>–<br>~~aee~~<br>~~ee ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~aee~~<br>~~ee ee ee~~<br>~~a~~<br>~~ee~~<br>~~eeee~~<br>~~ee~~<br>~~eG~~<br>~~GG~~||



I hold = Hold current: maximum current device will pass without tripping in 20°C still air. I trip = Trip current: minimum current at which the device will trip in 20°C still air. 

- Vint = Maximum voltage the device can withstand without damage at rated current (I max) 

- Vop=  The device regular operation voltage 

- I max = Maximum fault current device can withstand without damage at rated voltage (Vmax) 

   - R min = Minimum resistance of device in initial (un-soldered) state. R max = Maximum resistance of device in initial (un-soldered) state. 

   - R 1max =  Maximum resistance of device at 20°C measured one hour after tripping. **Caution:** Operation beyond the specified rating may result in damage and possible arcing and flame. 

- P d = Power dissipated from device when in the tripped state at 20°C still air. 

## **WARNING** 

- Users shall independently assess the suitability of these devices for each of their applications 

- Operation of these devices beyond the stated maximum ratings could result in damage to the devices and lead to electrical arcing and/or fire 

- These devices are intended to protect against the effects of temporary over-current or over-temperature conditions and are not intended to perform as protective devices where such conditions are expected to be repetitive or prolonged in duration 

- Exposure to silicon-based oils, solvents, electrolytes, acids, and similar materials can adversely affect the performance of these PPTC devices 

- These devices undergo thermal expansion under fault conditions, and thus shall be provided with adequate space and be protected against mechanical stresses 

- Circuits with inductance may generate a voltage (L di/dt) above the rated voltage of the PPTC device. 

© 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 04/01/15 

**POLY-FUSE® Resettable PTCs** 

Surface Mount > 250S Series 

**==> picture [94 x 32] intentionally omitted <==**

## **Temperature Rerating** 

**==> picture [506 x 361] intentionally omitted <==**

**----- Start of picture text -----**<br>
Ambient Operation Temperature<br>-40°C -20°C 0°C 20°C 40°C 50°C 60°C 70°C 85°C<br>Part Number Hold Current (A)<br>250S130 0.21 0.19 0.17 0.13 0.11 0.10 0.09 0.07 0.05<br>Average Time Current Curves Temperature Rerating Curve<br>200.00<br>250S<br>1000<br>160.00<br>120.00<br>100<br>80.00<br>40.00<br>10<br>0.00<br>-40.00 0.00 40.00 80.00 120.00<br>Device Ambient Temperature ºC<br>1<br>Agency Specification Selection Guide For Telecom<br>and Networking Applications<br>Product Lightning Power Cross<br>0.10<br>0.1 1 10 100 250S130<br>Current in Amperes 250S130V ITU K.20/21/45 –  ITU K.20/21/45 –<br>250S130-RA<br>0.13A<br>Percentage of rated current %<br>Time in Seconds<br>**----- End of picture text -----**<br>


||Product<br>Lightning|Power Cross|
|---|---|---|
||250S130||
||250S130V<br>250S130-RA<br>250S130-RB<br>ITU K.20/21/45 –<br>1.5kV 10/700μs|ITU K.20/21/45 –<br>230Vac, 10Ω|
||250S130-RC||
||**Protection Application Guide**||



The average time current curves and Temperature Rerating curve performance is affected by a number or variables, and these curves provided as guidance only. Customer must verify the performance in their application. 

**==> picture [246 x 187] intentionally omitted <==**

**----- Start of picture text -----**<br>
Region/ Device<br>Application<br>Specification Selection<br>Access network equipment 250S130<br>South America/   Remote terminal 250S130V<br>Asia/Europe   Repeaters 250S130-RA<br>  ITU K.45   WAN equipment 250S130-RB<br>  Cross –connect 250S130-RC<br>Customer and IT equipment<br>250S130<br>Analog modems<br>South America/ 250S130V<br>ADSL, xDSL<br>Asia/Europe 250S130-RA<br>Phone sets, PBX systems<br>  ITU K.21 250S130-RB<br>Internet appliances<br>250S130-RC<br>POS terminals<br>Central Office 250S130<br>South America/ POTS/ISDN linecards 250S130V<br>Asia/Europe T1/E1/J1 linecards 250S130-RA<br>  ITU K.20 ADSL/VDSL splitters 250S130-RB<br>CSU/DSU 250S130-RC<br>**----- End of picture text -----**<br>


© 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 04/01/15 

**POLY-FUSE® Resettable PTCs** 

Surface Mount > 250S Series 

**==> picture [93 x 32] intentionally omitted <==**

## **Soldering Parameters** 

|Profle Feature||Pb-Free Assembly|
|---|---|---|
|Average Ramp-Up<br>Pre Heat:|Rate (TS(max)to  TP)<br>Temperature Min (Ts(min))<br>Temperature Max (Ts(max))|3°C/second max<br>150°C<br>200°C|
|Time (Min to Max) (ts)<br>Time Maintained<br>Above:<br>Temperature (TL)<br>Temperature (tL)<br>Peak / Classifcation Temperature (TP)||60 – 180 secs<br>217°C<br>60 – 150 seconds<br>260+0/-5°C|
|Time within 5°C of actual peak<br>Temperature (tp)||20 – 40 seconds|
|Ramp-down Rate||6°C/second max|
|Time 25°C to peak Temperature (TP)||8 minutes Max.|



**==> picture [244 x 150] intentionally omitted <==**

**----- Start of picture text -----**<br>
t P<br>T P Critical Zone<br>Ramp-up t L  to t P<br>T S(max) T L t L<br>Ramp-down<br>Preheat<br>T S(min)<br>t S<br>25<br>time to peak temperature Time<br>Temperature<br>**----- End of picture text -----**<br>


- --  All temperature refer to topside of the package, measured on the package body surface 

- --  If reflow temperature exceeds the recommended profile, devices may not meet the performance requirements 

- --  Recommended reflow methods: IR, vapor phase oven, hot air oven, N2 environment for lead 

- --  Recommended maximum paste thickness is  0.25mm (0.010 inch) 

- --  Devices can be cleaned using standard industry methods and solvents 

- -- Devices can be reworked using the standard industry practices 

|**Physical Specifcations**|**Physical Specifcations**||**Environmental Specifcations**|**Environmental Specifcations**|
|---|---|---|---|---|
|**Terminal Material**|Solder-Plated Copper (Solder Material:<br>Matte Tin(Sn))||**Operating/Storage**<br>**Temperature**|-40°C to +85°C|
|**Lead Solderability**|Meets EIA Specifcation RS186-9E, ANSI/<br>J-STD-002 Category 3.||**Maximum Device Surface**<br>**Temperature in Tripped State**|125°C|
||||**Passive Aging**|+85°C, 1000 hours|
||||**Humidity Aging**|+85°C, 85%,R.H.,1000 hours|
||||**Thermal Shock**|MIL–STD–202, Method 107<br>+125°C to -55°C 10 times|
||||**Solvent Resistance**|MIL–STD–202, Method 215|
||||**Moisture Sensitivity Level**|Level 1, J–STD–020|



© 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 04/01/15 

**==> picture [94 x 32] intentionally omitted <==**

## **POLY-FUSE® Resettable PTCs** 

Surface Mount > 250S Series 

**==> picture [507 x 640] intentionally omitted <==**

**----- Start of picture text -----**<br>
Dimensions<br>C H<br>B<br>F<br>D E<br>A G G<br>Soldering Pad Layout<br>A B C D E F G H<br>Part<br>Inch mm Inch mm  Inch mm Inch mm Inch  mm Material Inch mm Inch mm  Inch mm<br>Number<br>Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Ma x. M ax. Max. Max. Max. Max.<br>250S130 0.37 9.4 0.15 3.7 0.29 7.4 0.016 0.4 0.15 3.8 Sn/Ni/Cu 0.18 4.6 0.07 1.8 0.24 6.1<br>250S130–RA 0.37 9.4 0.15 3.7 0.29 7.4 0.016 0.4 0.15 3.8 Sn/Ni/Cu 0.18 4.6 0.07 1.8 0.24 6.1<br>250S130–RB 0.37 9.4 0.15 3.7 0.29 7.4 0.016 0.4 0.15 3.8 S n/Ni/Cu 0 . 18 4.6 0.07 1.8 0.24 6.1<br>250S130–RC 0.37 9.4 0.15 3.7 0.29 7.4 0.016 0.4 0.15 3.8 Sn/Ni/Cu 0.18 4.6 0.07 1.8 0.24 6.1<br>A C<br>I<br>G<br>J<br>B G<br>H<br>H<br>D<br>Soldering Pad Layout<br>F E<br>A B C D E F G H I J<br>Part<br>Inch mm Inch mm  Inch mm Inch mm Inch  mm Inch  mm Material Inch mm Inch mm Inch mm Inch mm<br>Number<br>Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max. Max.<br>250S130V .24 6.1 .27 6.9 .13 3.2 .04 1.6 .07 1.9 .09 2.3 Sn/Ni/Cu .09 2.3 .09 2.4 .25 6.4 .14 3.43<br>Part Ordering Number System<br> 250 S 130 -RA D R<br>PACKAGING STYLE<br>R:  Tape & Reel<br>QUANTITY CODE: D =1500   Z =1200<br>OPTION CODE<br>(BLANK)  = Horizontal / 4-13Ω resistance range<br>  V   = Vertical / 4-13Ω resistance range<br>-RA  = Horizontal / 6.5-10Ω resistance range<br>-RB  = Horizontal / 9-13Ω resistance range<br>-RC  = Horizontal / 7-11Ω resistance range<br>I HOLD CURRENT CODE<br>(Refer to Electrical Characteristics Table)<br>SURFACE MOUNT<br>PEAK VOLTAGE RATING<br>Packaging<br>Part Number Ordering Number I(A) hold I hold Code Packaging  Option Quantity Quantity & Packaging Code<br>250S130 250S130DR 0.13 130 Tape and Reel 1500 DR<br>250S130V 250S130VZR 0.13 130 Tape and Reel 1200 ZR<br>250S130–RA 250S130–RADR 0.13 130 Tape and Reel 1500 DR<br>250S130–RB 250S130–RBDR 0.13 130 Tape and Reel 1500 DR<br>250S130–RC 250S130–RCDR 0.13 130 Tape and Reel 1500 DR<br>**----- End of picture text -----**<br>


© 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 04/01/15 

**POLY-FUSE® Resettable PTCs** 

Surface Mount > 250S Series 

**==> picture [93 x 32] intentionally omitted <==**

## **Tape and Reel Specifications** 

**==> picture [228 x 232] intentionally omitted <==**

**----- Start of picture text -----**<br>
TAPE SPECIFICATIONS:  REEL DIMENSIONS:<br>EIA-481-1  (mm) EIA-481-1 (mm)<br>W 16 +/- 0.30    H 22.4 +/- 0.05<br>F 7.5 +/- 0.05       W 16.4 .0 +0/+2<br>E 1 1.75 +/- 0.10      D Ø60+0.5<br>D 0 1.5 +/- 0.05      F Ø13.0+/- 0.2<br>D 1 1.00(MIN)          C Ø340+/- 1.0<br>P 0 4.00 +/- 0.10        H 1 11+/- 0.5<br>P 1 12.00 +/- 0.10         W 1 2.2+/- 0.5<br>P 2 2.00 +/- 0.05        W 2 3.0+0.5<br>A 0 6.9 +/- 0.10       W 3 4.0+0.5<br>B 0 9.6 +/- 0.10      W 4 5.5+0.5<br>Tmax 0.4 +/- 0.10<br>K 0 3.4 +/- 0.15<br>Leader Min. 300<br>Trailer Min. 300<br>**----- End of picture text -----**<br>


## **Tape and Reel Diagram** 

**==> picture [482 x 190] intentionally omitted <==**

**----- Start of picture text -----**<br>
H<br>P1 D0 P2<br>P0 E1<br>W4 W3<br>D C<br>F<br>W<br>W2<br>F W<br>T D2<br>W1<br>A0 K0 B0 H1<br>**----- End of picture text -----**<br>


© 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 04/01/15 



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- [Supplier page](https://es.farnell.com/littelfuse/250s130dr/fuse-resettable-ptc-60v-0-13a/dp/2786594)
---

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