# FUSE, PTC RESET, 30V, 2.5A, RADIAL

![Product image](https://novapart.co/image/farnell:2127592/)

**URL**: https://novapart.co/products/MF-R250/fuse-ptc-reset-30v-25a-radial
**SKU**: MF-R250
**Manufacturer**: BOURNS
**Category**: Circuit Protection || Thermistors || Resettable Fuses || Radial Leaded PPTCs
**Price**: €0.2850
**Stock**: 1000+
**Lead Time**: 60 days (indicative)

## Description

Product Range:MF-R Series; Voltage Rating:30VDC; Holding Current:2.5A; Trip Current:5A; Time to Trip:10.3s; Fuse Shape:Rectangular; Current Rating Max:40A; Lead Spa 59K0237

## Specifications

| Parameter | Value |
|---|---|
| Svhc | No SVHC (04-Feb-2026) |

## Datasheet

📄 [Download PDF](https://novapart.co/datasheet/farnell:2127592/)

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## **Features** 

- Radial Leaded Devices 

- Cured, flame retardant epoxy polymer insulating material meets UL 94V-0 requirements 

## **Additional Information** 

Click these links for more information: 

PRODUCT TECHNICAL INVENTORY SAMPLES CONTACT ■ RoHS compliant* and halogen free** SELECTOR LIBRARY 

- Agency recognition: 

## **MF-R Series - PTC Resettable Fuses** BOURNS ~~[i~~ 

## ~~**Electrical Characteristic**~~ 

|**Model**<br>~~|~~|**Vmax.**<br>~~LR}~~|**Imax.**<br>~~LR}~~|**Ihold**<br>~~LR}~~|**Itrip**<br>~~LR}~~|**Initial**<br>**Resistance**<br>~~LR}~~|**Initial**<br>**Resistance**<br>~~LR}~~|**1 Hour (R1)**<br>**Post-Trip**<br>**Resistance**<br>~~LR}~~|**Max. Time To Trip**|**Max. Time To Trip**|**Tripped**<br>**Power**<br>**Dissipation**<br>~~=~~|**Agency Recognition**<br>~~=~~|**Agency Recognition**<br>~~=~~|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
||||**at 23 °C**<br>~~LR}~~||**Ohms**<br>**at 23 °C**<br>~~LR}~~||**Ohms**<br>**at 23 °C**<br>~~LR}~~|**at 23 °C**||**Watts**<br>**at 23 °C**<br>~~=~~|**cUL**<br>~~=~~|**TÜV**<br>~~=~~|
||**Volts**<br>~~LR}~~|**Amps**<br>~~LR}~~|**Amps**<br>~~LR}~~||**RMin.**<br>~~LR}~~|**R1Max.**<br>~~LR}~~|**Max.**<br>~~LR}~~|**Amps**|**Seconds**|**Typ.**<br>~~=~~|E174545<br>~~=~~|R50366745<br>~~=~~|
|MF-R005<br>~~| ~~<br>~~pT~~<br>~~pC~~|60<br> ~~LR}~~<br>~~pT~~<br>~~pC~~|40<br>~~LR}~~|0.05<br>~~LR}~~|0.10<br>~~LR}~~|7.3<br>~~LR}~~|11.1<br>~~LR}~~|22.0<br>~~LR}~~|0.5|5.0|0.22<br>~~=~~|✓<br>~~=~~|✓<br>~~=~~|
|MF-R010<br>~~pC~~|60<br>~~pC~~|40|0.10|0.20|2.50|4.50|7.50|0.5|4.0|0.38|✓|✓|
|MF-R017<br>~~pC~~<br>~~pC~~|60<br>~~pC~~<br>~~pC~~|40<br>~~pC~~|0.17<br>~~pC~~|0.34<br>~~pC~~|2.00<br>~~pC~~|3.20<br>~~pC~~|8.00<br>~~pC~~|0.85<br>~~pC~~|3.0<br>~~pC~~|0.48<br>~~pC~~|✓<br>~~pC~~|✓<br>~~pC~~|
|MF-R020<br>~~pC~~<br>~~PoC~~|60<br>~~pC~~<br>~~PoC~~|40<br>~~pC~~|0.20<br>~~pC~~|0.40<br>~~pC~~|1.50<br>~~pC~~|2.84<br>~~pC~~|4.40<br>~~pC~~|1.0<br>~~pC~~|2.2<br>~~pC~~|0.40<br>~~pC~~|✓<br>~~pC~~|✓<br>~~pC~~|
|MF-R025<br>~~pC~~<br>~~PoC~~|60<br>~~pC~~<br>~~PoC~~|40<br>~~pC~~|0.25<br>~~pC~~|0.50<br>~~pC~~|1.00<br>~~pC~~|1.95<br>~~pC~~|3.00<br>~~pC~~|1.25<br>~~pC~~|2.5<br>~~pC~~|0.45<br>~~pC~~|✓<br>~~pC~~|✓<br>~~pC~~|
|MF-R030<br>~~PoC~~<br>~~pT~~<br>~~pC~~|60<br>~~PoC~~<br>~~pT~~<br>~~pC~~|40|0.30|0.60|0.76|1.36|2.10|1.5|3.0|0.50|✓|✓|
|MF-R040<br>~~pC~~<br>~~pC~~|60<br>~~pC~~<br>~~pC~~|40|0.40|0.80|0.52|0.86|1.29|2.0|3.8|0.55|✓|✓|
|MF-R050<br>~~pC~~<br>~~pC~~|60<br>~~pC~~<br>~~pC~~|40|0.50|1.00|0.41|0.77|1.17|2.5|4.0|0.75|✓|✓|
|MF-R065<br>~~pC~~<br>~~pC~~|60<br>~~pC~~<br>~~pC~~|40<br>~~pC~~|0.65<br>~~pC~~|1.30<br>~~pC~~|0.27<br>~~pC~~|0.48<br>~~pC~~|0.72<br>~~pC~~|3.25<br>~~pC~~|5.3<br>~~pC~~|0.90<br>~~pC~~|✓<br>~~pC~~|✓<br>~~pC~~|
|MF-R075<br>~~pC~~<br>~~PoC~~|60<br>~~pC~~<br>~~PoC~~|40<br>~~pC~~|0.75<br>~~pC~~|1.50<br>~~pC~~|0.18<br>~~pC~~|0.40<br>~~pC~~|0.60<br>~~pC~~|3.75<br>~~pC~~|6.3<br>~~pC~~|0.90<br>~~pC~~|✓<br>~~pC~~|✓<br>~~pC~~|
|MF-R090<br>~~pC~~<br>~~PoC~~|60<br>~~pC~~<br>~~PoC~~|40<br>~~pC~~|0.90<br>~~pC~~|1.80<br>~~pC~~|0.14<br>~~pC~~|0.31<br>~~pC~~|0.47<br>~~pC~~|4.5<br>~~pC~~|7.2<br>~~pC~~|1.00<br>~~pC~~|✓<br>~~pC~~|✓<br>~~pC~~|
|MF-R090-0-9<br>~~PoC~~<br>~~pT~~<br>~~pC~~|30<br>~~PoC~~<br>~~pT~~<br>~~pC~~|40|0.90|1.80|0.07|0.12|0.22|4.5|5.9|0.60|✓|✓|
|MF-R110<br>~~pC~~<br>~~pC~~|30<br>~~pC~~<br>~~pC~~|40|1.10|2.20|0.10|0.18|0.27|5.5|6.6|0.70|✓|✓|
|MF-R135<br>~~pC~~<br>~~pC~~|30<br>~~pC~~<br>~~pC~~|40|1.35|2.70|0.065|0.115|0.17|6.75|7.3|0.80|✓|✓|
|MF-R160<br>~~pC~~<br>~~pC~~|30<br>~~pC~~<br>~~pC~~|40<br>~~pC~~|1.60<br>~~pC~~|3.20<br>~~pC~~|0.055<br>~~pC~~|0.105<br>~~pC~~|0.15<br>~~pC~~|8.0<br>~~pC~~|8.0<br>~~pC~~|0.90<br>~~pC~~|✓<br>~~pC~~|✓<br>~~pC~~|
|MF-R185<br>~~pC~~<br>~~PoC~~|30<br>~~pC~~<br>~~PoC~~|40<br>~~pC~~|1.85<br>~~pC~~|3.70<br>~~pC~~|0.040<br>~~pC~~|0.07<br>~~pC~~|0.11<br>~~pC~~|9.25<br>~~pC~~|8.7<br>~~pC~~|1.00<br>~~pC~~|✓<br>~~pC~~|✓<br>~~pC~~|
|MF-R250<br>~~pC~~<br>~~PoC~~|30<br>~~pC~~<br>~~PoC~~|40<br>~~pC~~|2.50<br>~~pC~~|5.00<br>~~pC~~|0.025<br>~~pC~~|0.048<br>~~pC~~|0.07<br>~~pC~~|12.5<br>~~pC~~|10.3<br>~~pC~~|1.20<br>~~pC~~|✓<br>~~pC~~|✓<br>~~pC~~|
|MF-R250-0-10<br>~~PoC~~<br>~~pT~~<br>~~pC~~|30<br>~~PoC~~<br>~~pT~~<br>~~pC~~|40|2.50|5.00|0.025|0.048|0.07|12.5|10.3|1.20|✓|✓|
|MF-R300<br>~~pC~~<br>~~pC~~|30<br>~~pC~~<br>~~pC~~|40|3.00|6.00|0.020|0.05|0.08|15.0|10.8|2.00|✓|✓|
|MF-R400<br>~~pC~~<br>~~pC~~|30<br>~~pC~~<br>~~pC~~|40|4.00|8.00|0.010|0.03|0.05|20.0|12.7|2.50|✓|✓|
|MF-R500<br>~~pC~~<br>~~pC~~|30<br>~~pC~~<br>~~pC~~|40<br>~~pC~~|5.00<br>~~pC~~|10.00<br>~~pC~~|0.010<br>~~pC~~|0.03<br>~~pC~~|0.05<br>~~pC~~|25.0<br>~~pC~~|14.5<br>~~pC~~|3.00<br>~~pC~~|✓<br>~~pC~~|✓<br>~~pC~~|
|MF-R600<br>~~pC~~<br>~~PoC~~|30<br>~~pC~~<br>~~PoC~~|40<br>~~pC~~|6.00<br>~~pC~~|12.00<br>~~pC~~|0.005<br>~~pC~~|0.02<br>~~pC~~|0.04<br>~~pC~~|30.0<br>~~pC~~|16.0<br>~~pC~~|3.50<br>~~pC~~|✓<br>~~pC~~|✓<br>~~pC~~|
|MF-R700<br>~~pC~~<br>~~PoC~~|30<br>~~pC~~<br>~~PoC~~|40<br>~~pC~~|7.00<br>~~pC~~|14.00<br>~~pC~~|0.005<br>~~pC~~|0.02<br>~~pC~~|0.03<br>~~pC~~|35.0<br>~~pC~~|17.5<br>~~pC~~|3.80<br>~~pC~~|✓<br>~~pC~~|✓<br>~~pC~~|
|MF-R800<br>~~PoC~~<br>~~pT~~<br>~~pC~~|30<br>~~PoC~~<br>~~pT~~<br>~~pC~~|40|8.00|16.00|0.005|0.02|0.03|40.0|18.8|4.00|✓|✓|
|MF-R900<br>~~pC~~<br>~~pC~~|30<br>~~pC~~<br>~~pC~~|40<br>~~ee~~|9.00<br>~~ee~~|18.00<br>~~ee~~|0.005|0.01|0.02|40.0|20.0|4.20|✓|✓|
|MF-R1100<br>~~pC~~<br>~~pC~~|16<br>~~pC~~<br>~~pC~~|100<br>~~ee~~|11.00<br>~~ee~~|22.00<br>~~ee~~|0.003|0.01|0.014|40.0|20.0|4.50|✓|✓|



> * RoHS Directive 2015/863, Mar 31, 2015 and Annex. 

** Bourns considers a product to be “halogen free” if (a) the Bromine (Br) content is 900 ppm or less; (b) the Chlorine (Cl) content is 900 ppm or less; and (c) the total Bromine (Br) and Chlorine (Cl) content is 1500 ppm or less. Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

**WARNING Cancer and Reproductive Harm** www.P65Warnings.ca.gov 

## **Applications** 

Almost anywhere there is a low voltage power supply and a load to be protected, including: 

■ Computers & peripherals 

■ General electronics 

## **MF-R Series - PTC Resettable Fuses** 

## ~~**Environmental Characteristics**~~ 

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Item Condition Criteria<br>**----- End of picture text -----**<br>


|~~**Environmental Characteristics**~~|||
|---|---|---|
|**Item**|**Condition**|**Criteria**|
||||
|OperatingTemperature|-40 °C to +85 °C||
|Recommended Storage|+40 °C max. / 70 % RH max.||
|Passive Aging|+85 °C,1000 hours|±5 % typical resistance change|
|HumidityAging|+85 °C,85 % R.H. 1000 hours|±5 % typical resistance change|
|Thermal Shock|-40 °C to +85 °C,10 times|±10 % typical resistance change|
|Solvent Resistance|MIL-STD-202,Method 215|No change(markingstill legible)|
|Vibration|MIL-STD-883C,Method 2007.1 Condition A|No change(Rmin< R < R1max)|
|Moisture SensitivityLevel(MSL)|SeeNote||
|ESD Classifcation|Class 6 (per AEC-Q200-2, HBM)||



## ~~**Test Procedures and Requirements**~~ 

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Item Test Condition Accept/Reject Criteria<br>Visual/Mechanical Verify dimensions and materials Per MF physical description<br>**----- End of picture text -----**<br>


|~~**Test Procedures and Requirements**~~|||
|---|---|---|
|**Item**|**Test Condition**|**Accept/Reject Criteria**|
|Visual/Mechanical|Verify dimensions and materials|Per MF physical description|
|Resistance|In still air @ 23 °C|Rmin ≤ R ≤ Rmax|
|Time to Trip|At specifed current, Vmax, 23 °C, still air|T ≤ max. time to trip (seconds)|
|Hold Current|30 min. at Ihold|No trip|
|Trip Cycle Life|Vmax, Imax, 100 cycles|No arcing or burning|
|Trip Endurance|Vmax, 48 hours|No arcing or burning|
|Solderability|245 °C ±5 °C, 5 seconds|95 % min. coverage|



Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **MF-R Series - PTC Resettable Fuses** 

## ~~**Product Dimensions (see next page for outline drawing)**~~ 

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**----- Start of picture text -----**<br>
A  B  C D  E  Physical Characteristics<br>Model<br>Max. Max. Nom. Tol. ± Min. Max. Style Lead Dia. Material<br>8.0 8.3 5.1 0.7 7.6 3.1 0.405<br>MF-R005 4 Sn/NiCu<br>(0.315) (0.327) (0.201) (0.028) (0.299) (0.122) (0.016)<br>**----- End of picture text -----**<br>


|**Model**|**A**<br>**Max.**|**A**<br>**Max.**|**B**<br>**Max.**|**B**<br>**Max.**|**C**|**C**|**C**|**C**|**D**<br>**Min.**|**D**<br>**Min.**|**E**<br>**Max.**|**E**<br>**Max.**|**Physical Characteristics**|**Physical Characteristics**|**Physical Characteristics**|**Physical Characteristics**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
||||||**Nom.**||**Tol. ±**||||||**Style**|**Lead Dia.**||**Material**|
|MF-R005|8.0<br>(0.315)||8.3<br>(0.327)||5.1<br>(0.201)||0.7<br>(0.028)||7.6<br>(0.299)||3.1<br>(0.122)||4|0.405<br>(0.016)||Sn/NiCu|
|MF-R010||7.4<br>(0.291)||12.7<br>(0.5)||5.1<br>(0.201)||0.7<br>(0.028)||7.6<br>(0.299)||3.1<br>(0.122)|1||0.51<br>(0.020)|Sn/NiCu|
|MF-R017||7.4<br>(0.291)||12.7<br>(0.5)||5.1<br>(0.201)||0.7<br>(0.028)||7.6<br>(0.299)||3.1<br>(0.122)|1||0.51<br>(0.020)|Sn/CuFe|
|MF-R020||7.4<br>(0.291)||12.7<br>(0.5)||5.1<br>(0.201)||0.7<br>(0.028)||7.6<br>(0.299)||3.1<br>(0.122)|1||0.51<br>(0.020)|Sn/CuFe|
|MF-R025||7.4<br>(0.291)||12.7<br>(0.5)||5.1<br>(0.201)||0.7<br>(0.028)||7.6<br>(0.299)||3.1<br>(0.122)|1||0.51<br>(0.020)|Sn/CuFe|
|MF-R030||7.4<br>(0.291)||13.4<br>(0.528)||5.1<br>(0.201)||0.7<br>(0.028)||7.6<br>(0.299)||3.1<br>(0.122)|1||0.51<br>(0.020)|Sn/CuFe|
|MF-R040||7.4<br>(0.291)||13.7<br>(0.539)||5.1<br>(0.201)||0.7<br>(0.028)||7.6<br>(0.299)||3.1<br>(0.122)|1||0.51<br>(0.020)|Sn/CuFe|
|MF-R050||7.9<br>(0.311)||13.7<br>(0.539)||5.1<br>(0.201)||0.7<br>(0.028)||7.6<br>(0.299)||3.1<br>(0.122)|1||0.51<br>(0.020)|Sn/Cu|
|MF-R065||9.7<br>(0.382)||15.2<br>(0.598)||5.1<br>(0.201)||0.7<br>(0.028)||7.6<br>(0.299)||3.1<br>(0.122)|1||0.51<br>(0.020)|Sn/Cu|
|MF-R075||10.4<br>(0.409)||16.0<br>(0.630)||5.1<br>(0.201)||0.7<br>(0.028)||7.6<br>(0.299)||3.1<br>(0.122)|1||0.51<br>(0.020)|Sn/Cu|
|MF-R090||11.7<br>(0.461)||16.7<br>(0.657)||5.1<br>(0.201)||0.7<br>(0.028)||7.6<br>(0.299)||3.1<br>(0.122)|1||0.51<br>(0.020)|Sn/Cu|
|MF-R090-0-9||7.4<br>(0.291)||12.2<br>(0.480)||5.1<br>(0.201)||0.7<br>(0.028)||7.6<br>(0.299)||3.0<br>(0.118)|3||0.51<br>(0.020)|Sn/CuFe|
|MF-R110||8.9<br>(0.350)||14.0<br>(0.551)||5.1<br>(0.201)||0.7<br>(0.028)||7.6<br>(0.299)||3.0<br>(0.118)|1||0.51<br>(0.020)|Sn/Cu|
|MF-R135||8.9<br>(0.350)||18.9<br>(0.744)||5.1<br>(0.201)||0.7<br>(0.028)||7.6<br>(0.299)||3.0<br>(0.118)|1||0.51<br>(0.020)|Sn/Cu|
|MF-R160||10.2<br>(0.402)||16.8<br>(0.661)||5.1<br>(0.201)||0.7<br>(0.028)||7.6<br>(0.299)||3.0<br>(0.118)|1||0.51<br>(0.020)|Sn/Cu|
|MF-R185||12.0<br>(0.472)||18.4<br>(0.724)||5.1<br>(0.201)||0.7<br>(0.028)||7.6<br>(0.299)||3.0<br>(0.118)|1||0.51<br>(0.020)|Sn/Cu|
|MF-R250||12.0<br>(0.472)||18.3<br>(0.720)||5.1<br>(0.201)||0.7<br>(0.028)||7.6<br>(0.299)||3.0<br>(0.118)|2||0.81<br>(0.032)|Sn/Cu|
|MF-R250-0-10||12.0<br>(0.472)||18.3<br>(0.720)||5.1<br>(0.201)||0.7<br>(0.028)||7.6<br>(0.299)||3.0<br>(0.118)|3||0.51<br>(0.020)|Sn/CuFe|
|MF-R300||12.0<br>(0.472)||18.3<br>(0.720)||5.1<br>(0.201)||0.7<br>(0.028)||7.6<br>(0.299)||3.0<br>(0.118)|2||0.81<br>(0.032)|Sn/Cu|
|MF-R400||14.4<br>(0.567)||24.8<br>(0.976)||5.1<br>(0.201)||0.7<br>(0.028)||7.6<br>(0.299)||3.0<br>(0.118)|2||0.81<br>(0.032)|Sn/Cu|
|MF-R500||17.4<br>(0.685)||24.9<br>(0.980)||10.2<br>(0.402)||0.7<br>(0.028)||7.6<br>(0.299)||3.0<br>(0.118)|2||0.81<br>(0.032)|Sn/Cu|
|MF-R600||19.3<br>(0.760)||31.9<br>(1.256)||10.2<br>(0.402)||0.7<br>(0.028)||7.6<br>(0.299)||3.0<br>(0.118)|2||0.81<br>(0.032)|Sn/Cu|
|MF-R700||22.1<br>(0.870)||29.8<br>(1.173)||10.2<br>(0.402)||0.7<br>(0.028)||7.6<br>(0.299)||3.0<br>(0.118)|2||0.81<br>(0.032)|Sn/Cu|
|MF-R800||24.2<br>(0.953)||32.9<br>(1.295)||10.2<br>(0.402)||0.7<br>(0.028)||7.6<br>(0.299)||3.0<br>(0.118)|2||0.81<br>(0.032)|Sn/Cu|
|MF-R900||24.2<br>(0.953)||32.9<br>(1.295)||10.2<br>(0.402)||0.7<br>(0.028)||7.6<br>(0.299)||3.0<br>(0.118)|2||0.81<br>(0.032)|Sn/Cu|
|MF-R1100||24.2<br>(0.953)||32.9<br>(1.295)||10.2<br>(0.402)||0.7<br>(0.028)||7.6<br>(0.299)||3.0<br>(0.118)|2||0.81<br>(0.032)|Sn/Cu|



MM DIMENSIONS: (INCHES) 

Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **MF-R Series - PTC Resettable Fuses** 

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**----- Start of picture text -----**<br>
Product Dimensions (see previous page for dimensions)<br>**----- End of picture text -----**<br>


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**----- Start of picture text -----**<br>
Style 1 Style 2 Style 3 Style 4<br>A E A E A E A E<br>B<br>B B B<br>D<br>C<br>D<br>D D<br>C C C<br>NOTE: Kinked lead option is   NOTE: Also available with straight<br>available for board standoff.   leads. (See How to Order.)<br>(See How to Order.)<br>**----- End of picture text -----**<br>


## ~~**Thermal Derating Table - Ihold / Itrip (Amps)**~~ 

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**----- Start of picture text -----**<br>
Ambient Operating Temperature<br>Model<br>-40 ºC -20 ºC 0 ºC 23 ºC 40 ºC 50 ºC 60 ºC 70 ºC 85 ºC<br>**----- End of picture text -----**<br>


|**Model**|**Ambient Operating Temperature**|**Ambient Operating Temperature**|**Ambient Operating Temperature**|**Ambient Operating Temperature**|**Ambient Operating Temperature**|**Ambient Operating Temperature**|**Ambient Operating Temperature**|**Ambient Operating Temperature**|**Ambient Operating Temperature**|
|---|---|---|---|---|---|---|---|---|---|
||**-40 ºC**|**-20 ºC**|**0 ºC**|**23 ºC**|**40 ºC**|**50 ºC**|**60 ºC**|**70 ºC**|**85 ºC**|
|||||||||||
|MF-R005|0.08 / 0.16|0.07 / 0.14|0.06 / 0.12|0.05 / 0.10|0.04 / 0.08|0.04 / 0.08|0.03 / 0.07|0.03 / 0.07|0.02 / 0.05|
|MF-R010|0.16 / 0.32|0.14 / 0.28|0.12 / 0.24|0.10 / 0.20|0.08 / 0.16|0.07 / 0.14|0.06 / 0.12|0.05 / 0.10|0.04 / 0.08|
|MF-R017|0.26 / 0.52|0.23 / 0.46|0.20 / 0.40|0.17 / 0.34|0.14 / 0.28|0.12 / 0.24|0.11 / 0.22|0.09 / 0.18|0.07 / 0.14|
|MF-R020|0.31 / 0.62|0.27 / 0.54|0.24 / 0.48|0.20 / 0.40|0.16 / 0.32|0.14 / 0.28|0.13 / 0.26|0.11 / 0.22|0.08 / 0.16|
|MF-R025|0.39 / 0.78|0.34 / 0.68|0.30 / 0.60|0.25 / 0.50|0.20 / 0.40|0.18 / 0.36|0.16 / 0.32|0.14 / 0.28|0.10 / 0.20|
|MF-R030|0.47 / 0.94|0.41 / 0.82|0.36 / 0.72|0.30 / 0.60|0.24 / 0.48|0.22 / 0.44|0.19 / 0.38|0.16 / 0.32|0.12 / 0.24|
|MF-R040|0.62 / 1.24|0.54 / 1.08|0.48 / 0.96|0.40 / 0.80|0.32 / 0.64|0.29 / 0.58|0.25 / 0.50|0.22 / 0.44|0.16 / 0.32|
|MF-R050|0.78 / 1.56|0.68 / 1.36|0.60 / 1.20|0.50 / 1.00|0.41 / 0.82|0.36 / 0.72|0.32 / 0.64|0.27 / 0.54|0.20 / 0.40|
|MF-R065|1.01 / 2.02|0.88 / 1.76|0.77 / 1.54|0.65 / 1.30|0.53 / 1.06|0.47 / 0.94|0.41 / 0.82|0.35 / 0.70|0.26 / 0.52|
|MF-R075|1.16 / 2.32|1.02 / 2.04|0.89 / 1.78|0.75 / 1.50|0.61 / 1.22|0.54 / 1.08|0.47 / 0.94|0.41 / 0.82|0.30 / 0.60|
|MF-R090|1.40 / 2.80|1.22 / 2.44|1.07 / 2.14|0.90 / 1.80|0.73 / 1.46|0.65 / 1.30|0.57 / 1.14|0.49 / 0.98|0.36 / 0.72|
|MF-R090-0-9|1.40 / 2.80|1.22 / 2.44|1.07 / 2.14|0.90 / 1.80|0.73 / 1.46|0.65 / 1.30|0.57 / 1.14|0.49 / 0.98|0.36 / 0.72|
|MF-R110|1.60 / 3.20|1.43 / 2.86|1.27 / 2.54|1.10 / 2.20|0.91 / 1.82|0.85 / 1.70|0.75 / 1.50|0.67 / 1.34|0.57 / 1.14|
|MF-R135|1.96 / 3.92|1.76 / 3.52|1.55 / 3.10|1.35 / 2.70|1.12 / 2.24|1.04 / 2.08|0.92 / 1.84|0.82 / 1.64|0.70 / 1.40|
|MF-R160|2.32 / 4.64|2.08 / 4.16|1.84 / 3.68|1.60 / 3.20|1.33 / 2.66|1.23 / 2.46|1.09 / 2.18|0.98 / 1.96|0.83 / 1.66|
|MF-R185|2.68 / 5.36|2.41 / 4.82|2.13 / 4.26|1.85 / 3.70|1.54 / 3.08|1.42 / 2.84|1.26 / 2.52|1.13 / 2.26|0.96 / 1.92|
|MF-R250|3.63 / 7.26|3.25 / 6.50|2.88 / 5.76|2.50 / 5.00|2.08 / 4.16|1.93 / 3.86|1.70 / 3.40|1.53 / 3.06|1.30 / 2.60|
|MF-R250-0-10|3.63 / 7.26|3.25 / 6.50|2.88 / 5.76|2.50 / 5.00|2.08 / 4.16|1.93 / 3.86|1.70 / 3.40|1.53 / 3.06|1.30 / 2.60|
|MF-R300|4.35 / 8.70|3.90 / 7.80|3.45 / 6.90|3.00 / 6.00|2.49 / 4.98|2.31 / 4.62|2.04 / 4.08|1.83 / 3.66|1.56 / 3.12|
|MF-R400|5.80 / 11.6|5.20 / 10.4|4.60 / 9.20|4.00 / 8.00|3.32 / 6.64|3.08 / 6.16|2.72 / 5.44|2.44 / 4.88|2.08 / 4.16|
|MF-R500|7.25 / 14.5|6.50 / 13.0|5.75 / 11.5|5.00 / 10.0|4.15 / 8.30|3.85 / 7.70|3.40 / 6.80|3.05 / 6.10|2.60 / 5.20|
|MF-R600|8.70 / 17.4|7.80 / 15.6|6.90 / 13.8|6.00 / 12.0|4.98 / 9.96|4.62 / 9.24|4.08 / 8.16|3.66 / 7.32|3.12 / 6.24|
|MF-R700|10.1 / 20.3|9.10 / 18.2|8.05 / 16.1|7.00 / 14.0|5.81 / 11.6|5.39 / 10.7|4.76 / 9.52|4.27 / 9.44|3.64 / 7.28|
|MF-R800|11.6 / 23.2|10.4 / 20.8|9.20 / 18.4|8.00 / 16.0|6.64 / 13.2|6.16 / 12.3|5.44 / 10.8|4.88 / 9.76|4.16 / 8.32|
|MF-R900|13.0 / 26.1|11.7 / 23.4|10.3 / 20.7|9.00 / 18.0|7.47 / 14.9|6.93 / 12.7|6.12 / 12.2|5.49 / 10.9|4.68 / 9.36|
|MF-R1100|16.1 / 32.0|14.6 / 29.2|13.1 / 26.2|11.0 / 22.1|9.40 / 18.4|8.80 / 17.6|7.80 / 15.6|6.90 / 13.8|5.20 / 10.4|



Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **MF-R Series - PTC Resettable Fuses** 

## ~~**Typical Time to Trip at 23 ºC**~~ 

**==> picture [257 x 544] intentionally omitted <==**

**----- Start of picture text -----**<br>
100<br>10<br>1<br>0.1<br>0.01<br>0.001<br>0.1 1 10 100<br>Fault Current (Amps)<br>100<br>10<br>1<br>0.1<br>0.01<br>0.001<br>1 10 100<br>Fault Current (Amps)<br>MF-R005MF-R010MF-R017MF-R020MF-R025MF-R030MF-R040MF-R050MF-R065MF-R075MF-R090<br>MF-R090MF-R110MF-R135MF-R160MF-R185MF-R250,250-0-10MF-R300MF-R400MF-R500MF-R600MF-R700MF-R800MF-R900MF-R1100<br>  -0-9<br>Time to trip (Seconds)<br>Time to trip (Seconds)<br>**----- End of picture text -----**<br>


The Time to Trip curves represent typical performance of a device in a simulated application environment. Actual performance in specific customer applications may differ from these values due to the influence of other variables. 

Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. 

The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **MF-R Series - PTC Resettable Fuses** 

## ~~**How to Order**~~ 

**MF - R  110 - 0 - 14** Multifuse[®] Product Designator 

Series 

R = Radial Leaded Component 

Hold Current, Ihold 005-1100 (0.05 Amps - 11.0 Amps) 

Packaging Options 

- __ = Bulk Packaging without part number suffix option 

- 0 = Bulk Packaging with part number suffix option 

- 2 = Tape and Reel* 

- AP = Ammo-Pak* 

Part Number Suffix Option 

- 14 = Kinked leads where straight leads are standard 

- 17 = Straight leads where kinked leads are standard 

- 99 = RoHS Compliancy 

> _[As of date code April 1, 2005 all MF-R ] models are RoHS compliant. The suffix “-99” was originally provided to help customers distinguish between RoHS compliant and non-RoHS compliant products, but the -99 suffix option is no longer necessary. The -99 suffix option will no longer be available starting January 1, 2020. See Note for more details._ 

**==> picture [333 x 114] intentionally omitted <==**

**----- Start of picture text -----**<br>
Typical Part Marking: MF-R005 - R025 Typical Part Marking: MF-R030 - R1100<br>Represents total content. Layout may vary. Represents total content. Layout may vary.<br>PART  MANUFACTURER'S<br>IDENTIFICATION TRADEMARK<br>PART<br>IDENTIFICATION<br>025 R250 MANUFACTURING<br>MANUFACTURER'STRADEMARK 7A S MANUFACTURINGLOCATION: 7180 S LOCATION:S = CHINA<br>S = CHINA<br>DATE CODE: DATE CODE:<br>WEEK 1 OF 2017 = 7A (YEAR & WEEK) FIRST DIGIT = LAST DIGIT OF YEAR;<br>WEEK 27 OF 2017 = A7 (WEEK & YEAR) NEXT THREE DIGITS = DAY OF YEAR<br>**----- End of picture text -----**<br>


## ~~**Packaging Quantity**~~ 

**==> picture [331 x 27] intentionally omitted <==**

**----- Start of picture text -----**<br>
Unit Quantity<br>Packaging Options Models Unit<br>(Pcs.)<br>**----- End of picture text -----**<br>


|**Packaging Options**|**Models**|**Unit Quantity**<br>**(Pcs.)**|**Unit**|
|---|---|---|---|
|Bulk|All models|500|Bag|
|Tape & Reel|MF-R005 ~ MF-R160|3000|Reel|
||MF-R185 ~ MF-R400|1500||
||MF-R500 ~ MF-R1100|1000||
|Ammo-Pack|MF-R005 ~ MF-R160|2000|Pack|
||MF-R185 ~ MF-R400|1000||
||MF-R500 ~ MF-R1100|500||



*Packaged per EIA-468 

Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **MF-R Series Tape and Reel Specifications** 

Devices taped using EIA-468/IEC 60286-2 standards. See table below and figures for details. 

|**Dimension Description**<br>**IEC**<br>**Mark**<br>**EIA**<br>**Mark**<br>**Dimensions**|**Dimension Description**<br>**IEC**<br>**Mark**<br>**EIA**<br>**Mark**<br>**Dimensions**|**Dimension Description**<br>**IEC**<br>**Mark**<br>**EIA**<br>**Mark**<br>**Dimensions**|**Tolerance**|**Tolerance**|**Tolerance**|
|---|---|---|---|---|---|
|Carrier tape width<br>_W_<br>_W_||18<br>(.709)|+1.0/-0.5<br>(+.039/-.020)|||
|Hold down tape width<br>_W0_<br>_W0_||5<br>(.197)|min.|||
|Hold down tape<br>No protrusion||||||
|Adhesive tape position<br>_W2_<br>_W2_||3<br>(.118)|max.|||
|Sprocket hole position<br>_W1_<br>_W1_||9<br>(.354)|+0.75/-0.5<br>(+.030/-.020)|||
|Sprocket hole diameter<br>_D0_<br>_D0_||4<br>(.157)||±0.2<br>(±.0078)||
|Height to seating plane (straight lead)<br>_H_<br>_H_|18~20<br>(.709 ~ .787)|||||
|Height to seating plane (formed lead)<br>_H0_<br>_H0_||16<br>(.630)||±0.5<br>(±.020)||
|Overall height above abscissa: MF-R700<br>_H1_<br>_H1_||41<br>(1.61)||max.||
|Overall height above abscissa: all other models<br>_H1_<br>_H1_||38.5<br>(1.516)||max.||
|Cutout length<br>_L_||11<br>(.433)||max.||
|Sprocket hole pitch: MF-R005 ~ MF-R400<br>_P0_<br>_P0_||12.7<br>(.500)||±0.3<br>(±.012)||
|Sprocket hole pitch: MF-R500 ~ MF-R1100<br>_P0_<br>_P0_||30<br>(1.18)||±0.6<br>(±.024)||
|Device pitch: MF-R005 ~ MF-R185<br>_P_<br>_P_||12.7<br>(.500)||±0.3<br>(±.012)||
|Device pitch: MF-R250 ~ MF-R400<br>_P_<br>_P_||25.4<br>(1.00)||±0.6<br>(±.024)||
|Device pitch: MF-R500 ~ MF-R1100<br>_P_<br>_P_||30<br>(1.18)||±0.6<br>(±.024)||
|Pitch tolerance<br>20 consecutive||||±1<br>(±.039)||
|Composite tape thickness<br>_t_<br>_t_||0.9<br>(.035)||max.||
|Overall tape and lead thickness: MF-R005 ~ MF-R185<br>_t1_<br>_t1_||2.0<br>(.079)||max.||
|Overall tape and lead thickness: MF-R250 ~ MF-R1100<br>_t1_<br>_t1_||2.3<br>(.091)||max.||
|Splice sprocket hole alignment||0||±0.3<br>(±.012)||
|Front-to-back deviation<br>Δ_h_<br>Δ_h_||0||±1.0<br>(±.039)||
|Side-to-side deviation<br>Δ_p_<br>Δ_p_||0||±1.3<br>(±.051)||
|Ordinate to adjacent component lead: MF-R005 ~ MF-R400<br>_P1_<br>_P1_||3.81<br>(.150)||±0.7<br>(±.028)||
|Ordinate to adjacent component lead: MF-R500 ~ MF-R1100<br>_P1_<br>_P1_||9.9<br>(.390)||±0.7<br>(±.028)||
|Lead spacing: MF-R005 ~ MF-R400<br>_F_<br>_F_||5.08<br>(.200)||||
|Lead spacing: MF-R500 ~ MF-R1100<br>_F_<br>_F_||10.2<br>(.400)|+0.6/-0.2<br>(+.024/-.008)|||
|_— Continued on next page —_||DIMENSIONS:|||MM|
||||||(INCHES)|



Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. 

The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **MF-R Series Tape and Reel Specifications** 

Devices taped using EIA-468/IEC 60286-2 standards. See table below and figures for details. 

|**Dimension Description**<br>**IEC**<br>**Mark**<br>**EIA**<br>**Mark**|**Dimensions**<br>**Tolerance**|**Dimensions**<br>**Tolerance**|**Dimensions**<br>**Tolerance**|
|---|---|---|---|
|Reel width including flanges and hub<br>_W4_<br>_w2_||62.0<br>(2.44)<br>max||
|Dimension between flanges (measured at hub)<br>_W3_<br>_w1_|allow proper reeling and unreeling|||
|Reel diameter<br>_A_<br>a||370.0<br>(14.57)|max.|
|Space between flanges (at hub, excluding device)||4.75<br>(.187)|±3.25<br>(±.128)|
|Arbor hole diameter<br>_C_<br>_c_||26.0<br>(1.024)|±12.0<br>(±.472)|
|Core diameter<br>_N_<br>_n_||80<br>(3.15)|min.|
|Box dimensions|62 x|372 x 372<br>14.6 x 14.6)|max.|
||(2.44 x|||
|Consecutive missing places||3|max.|
|Empty places per reel|Less than 0.1 %|||



**==> picture [501 x 202] intentionally omitted <==**

**----- Start of picture text -----**<br>
MM<br>Taped Component Dimensions -    DIMENSIONS:<br>(INCHES)<br>per EIA Mark -<br>Figure 1<br>h h p p<br>Reference plane<br>H1  P1 F W2 H1<br>H<br>L A B W0 H0 W1<br>W<br>User direction of feed<br>P0 D0<br>t1 Cross section A - B t<br>**----- End of picture text -----**<br>


**Reel Dimensions -  per EIA Mark - Figure 2** 

**==> picture [399 x 142] intentionally omitted <==**

**----- Start of picture text -----**<br>
Reel<br>Upper side<br>n<br>Tape<br>User<br>a direction<br>of<br>feed<br>c Lower side<br>w1<br>w2<br>**----- End of picture text -----**<br>


MF-R SERIES, REV. AL, 05/21 

Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

## **3312 - 2 mm SMD Trimming PotentiometerBourns[®] Multifuse[®] PPTC Resettable Fuses** 

## ~~**Application Notice**~~ 

- Users are responsible for independent and adequate evaluation of Bourns[®] Multifuse[®] Polymer PTC devices in the user’s application, including the PPTC device characteristics stated in the applicable data sheet. 

- Polymer PTC devices must not be allowed to operate beyond their stated maximum ratings. Operation in excess of such maximum ratings could result in damage to the PTC device and possibly lead to electrical arcing and/or fire. Circuits with inductance may generate a voltage above the rated voltage of the polymer PTC device and should be thoroughly evaluated within the user’s application during the PTC selection and qualification process. 

- Polymer PTC devices are intended to protect against adverse effects of temporary overcurrent or overtemperature conditions up to rated limits and are not intended to serve as protective devices where overcurrent or overvoltage conditions are expected to be repetitive or prolonged. 

- In normal operation, polymer PTC devices experience thermal expansion under fault conditions. Thus, a polymer PTC device must be protected against mechanical stress, and must be given adequate clearance within the user’s application to accommodate such thermal expansion. Rigid potting materials or fixed housings or coverings that do not provide adequate clearance should be thoroughly examined and tested by the user, as they may result in the malfunction of polymer PTC devices if the thermal expansion is inhibited. 

- Exposure to lubricants, silicon-based oils, solvents, gels, electrolytes, acids, and other related or similar materials may adversely affect the performance of polymer PTC devices. 

- Aggressive solvents may adversely affect the performance of polymer PTC devices. Conformal coating, encapsulating, potting, molding, and sealing materials may contain aggressive solvents including but not limited to xylene and toluene, which are known to cause adverse effects on the performance of polymer PTCs. Such aggressive solvents must be thoroughly cured or baked to ensure their complete removal from polymer PTCs to minimize the possible adverse effect on the device. 

- Recommended storage conditions should be followed at all times. Such conditions can be found on the applicable data sheet and on the Multifuse[®] Polymer PTC Moisture/Reflow Sensitivity Classification (MSL) note: - 

- https://www.bourns.com/docs/RoHS MSL/msl_mf.pdf 

_MFAN 12/18_ Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. 

The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. 

® 

## **Legal Disclaimer Notice** 

This legal disclaimer applies to purchasers and users of Bourns[®] products manufactured by or on behalf of Bourns, Inc. and 

Unless otherwise expressly indicated in writing, Bourns[®] products and data sheets relating thereto are subject to change 

and complete before placing orders for Bourns[®] products. 

The characteristics and parameters of a Bourns[®] product set forth in its data sheet are based on laboratory conditions, and statements regarding the suitability of products for certain types of applications are based on Bourns’ knowledge of typical requirements in generic applications.  The characteristics and parameters of a Bourns[®] product in a user application may 

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® product as meeting the requirements of a particular industry 

failure of an individual Bourns ® product to meet the requirements of such industry standard or particular qualification. Users of Bourns[®] products are responsible for ensuring compliance with safety-related requirements and standards applicable to 

Bourns[®] 

on a case-by-case basis, use of any Bourns[®] 

® 

® 

® 

Bourns[®] 

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the user’s sole risk. 

and the user for which such Bourns[®] custom and the user regarding the use and level of also apply to such Bourns[®] custom products. 

® custom products shall be negotiated on a case-by-case basis by Bourns are specially designed. Absent a written agreement between Bourns testing, the above provisions applicable to Bourns ® standard products shall 

Users shall not sell, transfer, export or re-export any Bourns[®] 

Bourns[®] 

regulations. Further, Bourns ® products and Bourns technology and technical data may not under any circumstance be exported or re-exported to countries subject to international sanctions or embargoes.  Bourns[®] products may not, without 

_bilingual versions are available at:_ 

_Web Page: http://www.bourns.com/legal/disclaimers-terms-and-policies PDF: http://www.bourns.com/docs/Legal/disclaimer.pdf_ 



## Links

- [View this product on Novapart](https://novapart.co/products/MF-R250/fuse-ptc-reset-30v-25a-radial)
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- [Supplier page](https://es.farnell.com/bourns/mf-r250/fuse-ptc-reset-30v-2-5a-radial/dp/2127592)
---

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