MF-RM005/240-2.

FUSE, RESETTABLE PTC, 240VAC, 50mA, RADIAL

⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.

Manufacturer: BOURNS
Product type: Radial Leaded PPTCs
Height: 12.9mm
Diameter: 8.3mm
Thickness: 3.8mm
Fuse Shape: Round
Lead Spacing: 5.1mm
Time to Trip: 10s
Product Range: MF-RM Series
Voltage Rating: 240VAC
Holding Current: 50mA
Tripping Current: 120mA
Current Rating Max: 1A
Operating Temperature Max: 85°C
Operating Temperature Min: -20°C

Delivery and price
Units per pack	16000
Price	0.251 €
Current stock	10+
Lead time	30 days

Datasheet

## **Features** 

## **Applications** 

**==> picture [506 x 503] intentionally omitted <==**

**----- Start of picture text -----**<br>
||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|n|Radial leaded devices|n|Food blenders, coffee machines|
|n|Cured, flame retardant epoxy polymer|n|HVAC|
|insulating material meets UL 94V-0|n|Electric fans, blowers|
|requirements|
|n|AC adaptors|
|n|Bulk packaging, tape and reel available|
|n|Resettable circuit protection|
|n|Agency recognition:|
|n|RoHS compliant* and halogen free**|
|MF-RM Series - PTC Resettable Fuses|
|BOURNS®|a|
|Electrical Characteristics|
|One Hour|Tripped|
|Typical Current Trip Limit|Vmax|Imax|ResistanceInitial|ResistancePost-Trip|Time to TripMax.|DissiPower pation|
|Model|
|Ihold|Itrip|Operating|Interrupt|Interrupt|RMin.|R1 Max.|at 23 °C|PD Typ.|
|at 23 °C|at 23 °C|Voltage|Voltage|Current|at 23 °C|at 23 °C|at 23 °C|
|B|ER|(A)|(A)|RR|(Vac)|(Vac)|(A)|(Ohms)|(Ohms)|(A)|(Sec.)|(W)|
|/-————|MF-RM005/240|ee$f|0.05|0|ee|.12|ee|240|ee|265|fp|1.0|18.50|st|65.00|pf|0.25|10.0|ft|0.9|
|MF-RM008/240|0.08|0.19|240|265|1.2|7.40|26.00|0.40|10.0|0.9|
|——|MF-RM012/240|0.12|0.30|240|265|1.2|3.00|12.00|0.60|15.0|1.0|
|——|MF-RM016/240|0.16|0.37|240|265|2.0|2.50|7.80|0.80|15.0|1.4|
|MF-RM025/240|0.25|0.56|240|265|3.5|1.30|3.80|1.25|18.5|1.5|
|eeee|MF-RM033/240|0.33|ee|0.74|ee|240|Ge|265|4.5|ro|0.77|2.60|r.._|1.65|21.0|||1.7|
|a|MF-RM040/240|0.40|0.90|240|265|5.5|0.60|1.90|2.00|24.0|2.0|
|MF-RM055/240|0.55|1.25|240|265|7.0|0.45|1.45|2.75|26.0|3.4|
|ee|es|-—_}_+_Pf|
|Environmental Characteristics|
|Operating Temperature .................................... -20 °C to +85 °C|
|Humidity Aging................................................. +85 °C, 85 % R.H. 1000 hours .........................±20 % typical resistance change|
|Passive Aging .................................................. +85 °C, 1000 hours ...........................................±20 % typical resistance change|
|Vibration .......................................................... MIL-STD-883C, Method 2007.1,.......................No change|
|Condition A|
|Solvent Resistance .......................................... MIL-STD-202, Method 215 ...............................No change|
|Test Procedures And Requirements For Model MF-RM Series|
|Item|Test Conditions|Accept/Reject Criteria|
|Visual/Mechanical ............................................ Verify dimensions and material .........................Per MF physical description|
|Resistance ....................................................... In still air @ 23 °C .............................................Rmin ≤ R ≤ R1max|
|Time to Trip ...................................................... 240 Vac, specified current ................................T ≤ max. time to trip|
|Hold Current .................................................... At Ihold ..............................................................No trip|
|Trip Cycle Life .................................................. 240 Vac, Imax, 100 cycles ................................No arcing or burning|
|Trip Endurance ................................................ a)  240 Vac, Imax, 24 hours ..............................No arcing or burning|
|b)  265 Vac, Imax, 30 mins.|
|Solderability ..................................................... MIL-STD-202, Method 208 ...............................95 % min. coverage|

**----- End of picture text -----**<br>


UL File Number .....................E174545 ........... http://www.ul.com/  Follow link to Certifications, then UL File No., enter E174545 TÜV Certificate Number ........50232433 ......... http://www.tuvdotcom.com/certificates/50232433?locale=en&page_number=3 

> * RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. 

> ** Bourns follows the prevailing definition of “halogen free” in the industry.  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. 

The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications. 

## **Advantages** 

- n Resettable feature with overtemperature and overcurrent protection 

- can save expensive components from having to be replaced after tripping, e.g., transformers with built in thermal fuses 

- n Faster than bimetallic switch designs that take on average approximately 30 seconds to cool down and reset 

## **Benefits** 

   - n Reduced repair and replacement costs 

   - n Reduced nuisance tripping 

   - n Combined overcurrent and overtemperature protector in one device 

- n Generally lower electromagnetic interference than bimetallic switches 

## **MF-RX Series - PTC Resettable FusesM Series - PTC Rese table Fuses** 

## ~~**Thermal Derating Chart - Ihold (Amps)**~~ 

|**Model**|**Ambient Operating Temperature**<br>**-20 ºC**<br>**0 ºC**<br>**23 ºC**<br>**40 ºC**<br>**50 ºC**<br>**60 ºC**<br>**70 ºC**<br>**85 ºC**|**Ambient Operating Temperature**<br>**-20 ºC**<br>**0 ºC**<br>**23 ºC**<br>**40 ºC**<br>**50 ºC**<br>**60 ºC**<br>**70 ºC**<br>**85 ºC**|**Ambient Operating Temperature**<br>**-20 ºC**<br>**0 ºC**<br>**23 ºC**<br>**40 ºC**<br>**50 ºC**<br>**60 ºC**<br>**70 ºC**<br>**85 ºC**|**Ambient Operating Temperature**<br>**-20 ºC**<br>**0 ºC**<br>**23 ºC**<br>**40 ºC**<br>**50 ºC**<br>**60 ºC**<br>**70 ºC**<br>**85 ºC**|**Ambient Operating Temperature**<br>**-20 ºC**<br>**0 ºC**<br>**23 ºC**<br>**40 ºC**<br>**50 ºC**<br>**60 ºC**<br>**70 ºC**<br>**85 ºC**|**Ambient Operating Temperature**<br>**-20 ºC**<br>**0 ºC**<br>**23 ºC**<br>**40 ºC**<br>**50 ºC**<br>**60 ºC**<br>**70 ºC**<br>**85 ºC**|**Ambient Operating Temperature**<br>**-20 ºC**<br>**0 ºC**<br>**23 ºC**<br>**40 ºC**<br>**50 ºC**<br>**60 ºC**<br>**70 ºC**<br>**85 ºC**|**Ambient Operating Temperature**<br>**-20 ºC**<br>**0 ºC**<br>**23 ºC**<br>**40 ºC**<br>**50 ºC**<br>**60 ºC**<br>**70 ºC**<br>**85 ºC**|
|---|---|---|---|---|---|---|---|---|
|||**0 ºC**|**23 ºC**|**40 ºC**|**50 ºC**|**60 ºC**|**70 ºC**|**85 ºC**|
|MF-RM005/240|0.08|0.06|0.05|0.04|0.04|0.03|0.03|0.02|
|MF-RM008/240|0.12|0.10|0.08|0.07|0.06|0.05|0.04|0.03|
|MF-RM012/240|0.18|0.15|0.12|0.10|0.09|0.07|0.06|0.04|
|MF-RM016/240|0.24|0.20|0.16|0.13|0.11|0.10|0.08|0.05|
|MF-RM025/240|0.38|0.32|0.25|0.21|0.18|0.15|0.13|0.09|
|MF-RM033/240|0.50|0.42|0.33|0.27|0.23|0.20|0.17|0.11|
|MF-RM040/240|0.61|0.51|0.40|0.33|0.28|0.24|0.20|0.14|
|MF-RM055/240|0.80|0.68|0.55|0.46|0.40|0.35|0.29|0.22|



## ~~**Product Dimensions**~~ 

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   Model  A  B                       C  D  E   Physical Characteristics<br>Max.  Max.  Nom.  Tol. ±  Min.  Max.  Style  Lead Dia.  Material<br>8.3  12.9  5.1  0.7  7.6  3.8  0.51<br> MF-RM005/240  1 Sn/Cu<br>(0.327) (0.508) (0.201) (0.028) (0.299) (0.150) (0.020)<br>8.3  12.9  5.1  0.7  7.6  3.8  0.51<br> MF-RM008/240  1 Sn/Cu<br>(0.327) (0.508) (0.201) (0.028) (0.299) (0.150) (0.020)<br>8.3  12.9  5.1  0.7  7.6  3.8  0.51<br> MF-RM012/240  1 Sn/Cu<br>(0.327) (0.508) (0.201) (0.028) (0.299) (0.150) (0.020)<br>9.9  13.8  5.1  0.7  7.6  3.8  0.51<br> MF-RM016/240  1 Sn/Cu<br>(0.390) (0.543) (0.201) (0.028) (0.299) (0.150) (0.020)<br>10.0  20.0  5.1  0.7  7.6  3.8  0.65<br> MF-RM025/240  2 Sn/Cu<br>(0.394) (0.787) (0.201) (0.028) (0.299) (0.150) (0.026)<br>11.4  20.0  5.1  0.7  7.6  3.8  0.65<br> MF-RM033/240  2 Sn/Cu<br>(0.449) (0.787) (0.201) (0.028) (0.299) (0.150) (0.026)<br>11.5  20.9  5.1  0.7  7.6  3.8  0.65<br> MF-RM040/240  2 Sn/Cu<br>(0.453) (0.823) (0.201) (0.028) (0.299) (0.150) (0.026)<br>14.0  22.4  5.1  0.7  7.6  4.1  0.81<br> MF-RM055/240  2 Sn/Cu<br>(0.551)  (0.882)  (0.201)  (0.028)  (0.299)  (0.161)  (0.032)<br>Packaging options:     0.51 (24AWG)  DIMENSIONS: MM<br>BULK:   500 pcs. per bag.      0.65 (22AWG)  (INCHES)<br>0.81 (20AWG)<br>**----- End of picture text -----**<br>


Packaging options: BULK:   500 pcs. per bag. 

TAPE & REEL:  2000 pcs. per reel (MF-RM005/240~MF-RM040/240); 1000 pcs. per reel (MF-RM055/240) 

**==> picture [292 x 168] intentionally omitted <==**

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Style 1 Style 2<br>A E A E<br>B B<br>D D<br>LEAD LEAD<br>DIA. C DIA. C<br>**----- End of picture text -----**<br>


## ~~**Typical Part Marking**~~ 

Represents total content. Layout may vary. 

**==> picture [153 x 128] intentionally omitted <==**

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MANUFACTURER'S<br>PART  TRADEMARK<br>IDENTIFICATION<br>RM055<br>DATE CODE 0220S<br>(FIRST DIGIT = COUNTRY OF<br>LAST DIGIT OF YEAR; MANUFACTURE<br>NEXT THREE DIGITS = (T = TAIWAN<br>DAY OF YEAR)  S = CHINA)<br>Specifications are subject to change without notice.<br>The device characteristics and parameters in this data<br>sheet can and do vary in different applications and<br>actual device performance may vary over time.<br>**----- End of picture text -----**<br>


Users should verify actual device performance in their specific applications. 

Also available with straight leads (see How to Order). 

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

## ~~**Typical Time to Trip at 23 ˚C**~~ 

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

**MF - RM 005 / 240 - 2 - 17** 

**==> picture [268 x 173] intentionally omitted <==**

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


A = MF-RM005/240 B = MF-RM008/240 C = MF-RM012/240 D = MF-RM016/240 E = MF-RM025/240 F = MF-RM033/240 G = MF-RM040/240 H = MF-RM055/240 

Multifuse[®] Product Designator Series RM = Radial Leaded Component Hold Current, Ihold 005-055 (0.05 A - 0.55 A) Operating Voltage, Vmax 240 = 240 Vac Packaging Options - 0 =  Bulk Packaging - 2 =  Tape and Reel Part Number Suffix Option - 17 = Straight Leads in Place of Standard Kinked Leads 

*Packaged per EIA486-B 

MF-RM SERIES, REV. F, 09/16 

Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications. 

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

Devices taped using EIA468–B/IEC60286-2 standards.  See table below and Figures 1 and 2 for details. 

|Devices taped using EIA468–B/IEC60286-2 standards.  See table below and Figures 1 and 2 for details.|Devices taped using EIA468–B/IEC60286-2 standards.  See table below and Figures 1 and 2 for details.|Devices taped using EIA468–B/IEC60286-2 standards.  See table below and Figures 1 and 2 for details.|Devices taped using EIA468–B/IEC60286-2 standards.  See table below and Figures 1 and 2 for details.|
|---|---|---|---|
|**IEC**<br>**EIA**<br>**Dimensions**<br>**Dimension Description**<br>**Mark**<br>**Mark**<br>**Dimensions**<br>**Tolerance**||||
|Carrier tape width<br>_W_<br>_W_|18<br>(.709)|-0.5/+1.0<br>(-0.02/+.039)||
|Hold down tape width<br>_W0_<br>_W4_|11<br>(.433)|min.||
|Hold down tape<br>No|protrusion|||
|Top distance between tape edges<br>_W2_<br>_W6_|3<br>(.118)|max.||
|Sprocket hole position<br>_W1_<br>_W5_|9<br>(.354)|-0.5/+0.75<br>(-0.02/+0.03)||
|Sprocket hole diameter<br>_D0_<br>_D0_|4<br>(.157)||±0.2<br>(±.079)|
|Abscissa to plane (MF-RM005/240~MF-RM016/240)<br>_H_<br>_H_|18.5<br>(.728)||±3.0<br>(±.118)|
|Abscissa to plane (MF-RM025/240~MF-RM055/240)<br>_H0_<br>_H0_|16<br>(.63)||±0.5<br>(±.02)|
|Abscissa to top (MF-RM005/240~MF-RM016/240)<br>_H1_<br>_H1_|32.2<br>(1.268)||max.|
|Abscissa to top (MF-RM025/240~MF-RM055/240)<br>_H1_<br>_H1_|45.0<br>(1.772)||max.|
|Overall width w/lead protrusion (MF-RM005/240~MF-RM016/240)<br>_C1_|43.2<br>(1.701)||max.|
|Overall width w/lead protrusion (MF-RM025/240~MF-RM055/240)<br>_C1_|56.0<br>(2.205)||max.|
|Overall width w/o lead protrusion (MF-RM005/240~MF-RM016/240)<br>_C2_|42.5<br>(1.673)||max.|
|Overall width w/o lead protrusion (MF-RM025/240~MF-RM055/240)<br>_C2_|56.0<br>(2.205)||max.|
|Lead protrusion<br>_I1_<br>_L1_|1.0<br>(.039)||max.|
|Protrusion of cutout<br>_L_<br>_L_|11<br>(.433)||max.|
|Protrusion beyond hold-down tape<br>_I2_<br>_I2_<br>Not specifed||||
|Sprocket hole pitch<br>_P0_<br>_P0_|12.7<br>(.500)||±0.3<br>(±.012)|
|Pitch tolerance<br>20 consecutive|||±1<br>(±.039)|
|Device pitch (MF-RM005/240-MF-RM040/240)|12.7<br>(.500)||±0.3<br>(±.012)|
|Device pitch (MF-RM055/240)|25.4<br>(1.00)||±0.6<br>(±.024)|
|Tape thickness<br>_t_<br>_t_|0.9<br>(.035)||max.|
|Tape thickness with splice (MF-RM005/240~MF-RM040/240)<br>_t1_|1.5<br>(.059)||max.|
|Tape thickness with splice (MF-RM055/240)<br>_t1_|2.3<br>(.091)||max.|
|Splice sprocket hole alignment|0||±0.3<br>(±.012)|
|Body lateral deviation<br>Δ_h_<br>Δ_h_|0||±1<br>(±.039)|
|Body tape plane deviation<br>Δ_p_<br>Δ_p_|0||±0.3<br>(±.012)|
|Lead seating plane deviation<br>Δ_P1_<br>_P1_|3.81<br>(.015)||±0.7<br>(±.028)|
|Lead spacing<br>_F_<br>_F_|5.08<br>(.200)|||



MM DIMENSIONS: (INCHES) 

Specifications are subject to change without notice. 

The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications. 

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

|**Dimension Description**|**Dimension Description**|**Dimension Description**|**Dimension Description**|**Dimension Description**|**Dimension Description**|**Dimension Description**|**Dimension Description**||**IEC**<br>**EIA**<br> <br>**Mark**<br>**Mark**|**IEC**<br>**EIA**<br> <br>**Mark**<br>**Mark**|**IEC**<br>**EIA**<br> <br>**Mark**<br>**Mark**|**IEC**<br>**EIA**<br> <br>**Mark**<br>**Mark**|**IEC**<br>**EIA**<br> <br>**Mark**<br>**Mark**|**IEC**<br>**EIA**<br> <br>**Mark**<br>**Mark**|**IEC**<br>**EIA**<br> <br>**Mark**<br>**Mark**|**Dimensions**<br>**Dimensions**<br>**Tolerance**|**Dimensions**<br>**Dimensions**<br>**Tolerance**|**Dimensions**<br>**Dimensions**<br>**Tolerance**|**Dimensions**<br>**Dimensions**<br>**Tolerance**|**Dimensions**<br>**Dimensions**<br>**Tolerance**|**Dimensions**<br>**Dimensions**<br>**Tolerance**|**Dimensions**<br>**Dimensions**<br>**Tolerance**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|Reel width (MF-RM005/240~MF-RM040/240)|||||||||_w_<br>_w2_||||||||56.0<br>(2.20)|||||max.|
|Reel width (MF-RM055/240)|||||||||_w_<br>_w2_||||||||63.5<br>(2.50)|||||max.|
|Reel diameter|||||||||_d_<br>_a_||||||||370.0<br>(14.57)|||||max.|
|Space between fanges (MF-RM005/240~MF-RM040/240)|||||||||_h_<br>_w1_||||||||48.0<br>(1.89)|||||max.|
|Space between fanges (MF-RM055/240)|||||||||_h_<br>_w1_||||||||55.0<br>(2.17)|||||max.|
|Ab hl dit|||||||||_f_<br>||||||||26.0|||||±12.0|
|ror oe|ameer||||||||<br>_c_||||||||(1.02)|||||(±.472)|
|Core diamet|er||||||||_h_<br>_n_||||||||91.0<br>(3.58)|||||max.|
||||||||||||||||||||||||
|Box||||||||||||||||64|372<br>(14.6)|||3||max.|
|||||||||||||||||(2.5)|||||||
|Consecutive missing||places|||||||||||||||3|||||max.|
|Empty places per reel|||||||||||||||||0.1 %||||max.||
|||||**1**|||||||||||||||||||
||||||||||||||||||||||||
|||||**e**|||||||||||||||||||
||||||||||||||||||||||||
||||||||||||||||||||||||



MM DIMENSIONS: (INCHES) 

## **Taped Component Dimensions - Figure 1** 

**==> picture [394 x 148] intentionally omitted <==**

**----- Start of picture text -----**<br>
h h p p<br>Reference plane<br>H1  P1 H1<br>F<br>H<br>L A B W0H0 W1<br>W<br>I2 I1 P0 D0 User direction of feed<br>**----- End of picture text -----**<br>


**==> picture [404 x 191] intentionally omitted <==**

**----- Start of picture text -----**<br>
1 0 0 User direction of feed<br>Cross section A - B<br>t<br>Reel<br>h Upper side<br>Tape<br>User<br>d direction<br>of<br>feed<br>Lower side<br>f<br>h<br>w<br>**----- End of picture text -----**<br>


## **Reel Dimensions - Figure 2** 

Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications.

Updated at February 9, 2023

Bourns, Inc. is a globally recognized manufacturer of high-reliability electronic components, headquartered in Riverside, California. Renowned for its engineering excellence, the company delivers critical solutions across a diverse range of demanding markets, including automotive, industrial, consumer electronics, telecommunications, and medical equipment. The Bourns product portfolio is anchored by an industry-leading selection of passive components and circuit protection devices. The brand is particularly dominant in magnetic components, offering thousands of high-performance power inductors, alongside specialized RF and toroidal inductors engineered for optimized power management and signal integrity. Equally prominent is their comprehensive suite of circuit protection solutions. This robust lineup features a vast array of standard and resettable fuses, transient voltage suppressors (including TVS varistors and diodes), and gas discharge tubes (GDTs) designed to rigorously safeguard sensitive electronics against overvoltage and overcurrent faults. Beyond its core passives and protection technologies, Bourns manufactures highly effective EMC and RFI suppression components, such as common mode chokes and power line filters. The company's offering also extends into discrete semiconductors and power management, including Schottky diodes, fast recovery rectifiers, bridge rectifiers, and board-level transformers. This expansive breadth of quality components provides design engineers with a trusted foundation for developing resilient, efficient, and long-lasting electronic systems.

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