MF-USML500-2

Resettable Fuse, PPTC, 1210 (3225 Metric), MF-USML, 6 VDC, 5 A, 10 A, 2 s

⚠️ 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: Surface Mount PPTCs

Delivery and price
Units per pack	1500
Price	0.219 €
Current stock	10+
Lead time	30 days

Datasheet

## **Features** 

## **Applications** 

**==> picture [500 x 120] intentionally omitted <==**

**----- Start of picture text -----**<br>
n  Surface mount packaging for automated   n  Thermal protection for Li-ion and polymer<br>assembly battery packs<br>n  Small footprint size (1210) and low profile  n  Game consoles<br>for space-constrained mobile applications n  PC motherboards<br>n  Ultra-low resistance n  USB port protection - USB 2.0, 3.0 & OTG<br>n  RoHS compliant* and halogen free** n  Mobile phones<br>n  Agency recognition: n  Digital cameras<br>  MF-USML Series - Low Ohmic PTC Resettable Fuses<br>POURNS  is<br>&<br>*RoHS COMPLIANT<br>**HALOGEN FREE<br>**----- End of picture text -----**<br>


## ~~**Electrical Characteristics**~~ 

**==> picture [504 x 234] intentionally omitted <==**

**----- Start of picture text -----**<br>
|||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|Max. Time|Tripped|
|V max.|I max.|Ihold|Itrip|Resistance|To Trip|DissPower ipation|
|Model|
|Volts|Amps|Amperes|Ohms|Amperes|Seconds|Watts|
|at 23 °C|at 23 °C|at 23 °C|at 23 °C|at 23 °C|
|a|Hold|Trip|RMin.|R1Max.|Typ.|
|a|MF-USML175|6|GG|50|1.75|3.50|0.0060|0.0400|8.00|2.50|0.8|
|a|MF-USML190|6|GG|50|1.90|4.90|0.0060|0.0300|9.50|3.00|0.8|
|a|MF-USML200|6|GG|50|2.00|4.00|0.0050|0.0240|8.00|3.00|0.8|
|a|MF-USML230|6|GG|50|2.30|4.60|0.0045|0.0240|8.00|3.50|0.8|
|a|MF-USML250|6|GG|50|2.50|5.00|0.0045|0.0220|8.00|3.50|0.8|
|a|MF-USML270|6|GG|50|2.70|5.40|0.0040|0.0200|8.00|4.00|0.8|
|a|MF-USML300|6|GG|50|3.00|6.00|0.0040|0.0180|8.00|4.00|0.8|
|a|MF-USML350|6|GG|50|3.50|7.00|0.0030|0.0180|17.50|2.00|0.8|
|a|MF-USML380|6|GG|50|3.80|8.00|0.0020|0.0160|19.00|2.00|0.8|
|a|MF-USML400***|6|GG|50|4.00|8.00|0.0015|0.0155|20.00|2.00|0.8|
|a|MF-USML450***|6|GG|50|4.50|9.00|0.0010|0.0150|22.50|2.00|0.8|
|a|MF-USML500***|6|GG|50|5.00|10.00|0.0010|0.0145|25.00|2.00|0.8|
|a|MF-USML600***|6|GG|50|6.00|12.00|0.0010|0.0140|30.00|2.00|0.8|
|a|MF-USML650***|6|GG|50|6.50|13.00|0.0010|0.0140|32.50|2.00|0.8|
|DGG|MF-USML700***|6|50|7.00|14.00|0.0010|0.0135|35.00|2.00|0.8|

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


*** TÜV approval pending. 

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

Operating Temperature ......................................... -40 °C to +85 °C Passive Aging ....................................................... +85 °C, 1000 hours ............................................... ±10 % typical resistance change Humidity Aging...................................................... +85 °C, 85 % R.H. 100 hours ............................... ±15 % typical resistance change Thermal Shock ..................................................... +85 °C to -40 °C, 20 times .................................... ±30 % typical resistance change Solvent Resistance ............................................... MIL-STD-202, Method 215 ................................... No change Vibration ............................................................... MIL-STD-883C, Method 2007.1, ........................... No change Condition A 

## ~~**Test Procedures And Requirements For Model MF-USML Series**~~ 

**==> picture [472 x 116] intentionally omitted <==**

**----- Start of picture text -----**<br>
||||
|---|---|---|
|Test|Test Conditions|Accept/Reject Criteria|
|Visual/Mech. ......................................................... Verify dimensions and materials ........................... Per MF physical description|
|Resistance ............................................................ In still air @ 23 °C ................................................. Rmin ≤ R ≤ R1max|
|Time to Trip ........................................................... At specified current, Vmax, 23 °C ......................... 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 .......................................................... ANSI/J-STD-002 ................................................... 95 % min. coverage|
|cUL File Number ................................................... E174545|
|http://www.ul.com/  Follow link to Certifications, then cUL File No., enter E174545|
|TÜV Certificate Number ....................................... R 02057213|
|http://www.tuvdotcom.com/ Follow link to “other certificates”, enter File No. 2057213|

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


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

**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. 

## **MF-USML Series - Low Ohmic PTC Resettable Fuses** 

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

|**Model**|||**A**|**A**|**A**|**A**|||**B**|**B**||||**C**|**C**|**C**|||**D**||**E**|**E**||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
||||Min.||||Max.||Min.||Max.|||Min.|||Max.||Min.||Min.||Max.|
|MF-USML175|||3.00<br>(0.118)||||3.43<br>(0.135)||2.35<br>(0.093)||2.80<br>(0.110)|||0.30<br>(0.012)|||0.60<br>(0.024)||0.25<br>(0.010)||0.05<br>(0.002)||0.45<br>(0.018)|
|MF-USML190||||||||||||||||||||||||
|MF-USML200||||||||||||||||||||||||
|MF-USML230||||||||||||||||||||||||
|MF-USML250||||||||||||||||||||||||
|MF-USML270||||||||||||||||||||||||
|MF-USML300||||||||||||||||||||||||
|MF-USML350||||||||||||||||||||||||
|MF-USML380||||||||||||||||||||||||
|MF-USML400||||||||||||||||||||||||
|MF-USML450|||3.00<br>(0.118)||||3.43<br>(0.135)||2.35<br>(0.093)||2.80<br>(0.110)|||0.60<br>(0.024)|||1.20<br>(0.047)||0.25<br>(0.010)||0.05<br>(0.002)||0.45<br>(0.018)|
|MF-USML500||||||||||||||||||||||||
|MF-USML600||||||||||||||||||||||||
|MF-USML650||||||||||||||||||||||||
|MF-USML700||||||||||||||||||||||||
|Packaging:<br>MF-USML175~M<br>MF-USML450~M<br>A<br>**_Top View_**|F-U<br>F-U||SML<br>SML<br><br>**_S_**|400 = 5000 pcs. per reel<br>700 = 3500 pcs. per reel<br>**_Bottom Vie_**<br>D<br>E<br><br>**_ide View_**|||||**_w_**|**_Reco_**<br>1.0 ±<br>(.039 ±|**_eco_**<br>.0 ±|**_mmended Pad_**<br>0.05||**_Layout_**||||||||||
||||B<br>|||||||||||||||||||||
|||||||||||||2.0 ± 0.1<br>.002)||||||||||||
|||||||||||||||||||||||||
|||||||||||||||||||||||||
|||||||||||||||||||||||||
|||||||||||||||||||||||||
|||||||||||||<br>(.079 ± .004)||||||||||||



Packaging: MF-USML175~MF-USML400 = 5000 pcs. per reel MF-USML450~MF-USML700 = 3500 pcs. per reel 

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

|**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 °C**|**-20 °C**|**0 °C**|**23 °C**|**40 °C**|**50 °C**|**60 °C**|**70 °C**|**85 °C**|
|MF-USML175|2.57|2.33|2.07|1.75|1.49|1.34|1.24|1.00|0.91|
|MF-USML190|2.89|2.58|2.25|1.90|1.54|1.36|1.21|0.94|0.77|
|MF-USML200|3.26|2.87|2.50|2.00|1.70|1.48|1.29|1.09|0.78|
|MF-USML230|3.55|3.17|2.78|2.30|1.94|1.72|1.55|1.27|1.06|
|MF-USML250|3.70|3.35|2.95|2.50|2.10|1.90|1.75|1.40|1.30|
|MF-USML270|3.98|3.60|3.18|2.70|2.28|2.03|1.90|1.52|1.40|
|MF-USML300|4.41|3.99|3.54|3.00|2.55|2.30|2.13|1.71|1.56|
|MF-USML350|5.00|4.60|4.05|3.50|2.80|2.40|2.00|1.60|1.00|
|MF-USML380|6.00|5.28|4.52|3.80|3.15|2.65|2.39|2.09|1.60|
|MF-USML400|5.71|5.26|4.63|4.00|3.20|2.70|2.29|2.00|1.37|
|MF-USML450|6.62|5.99|5.31|4.50|3.83|3.50|3.20|2.57|2.34|
|MF-USML500|7.35|6.60|5.90|5.00|4.25|3.88|3.55|2.85|2.60|
|MF-USML600|8.82|7.98|7.08|6.00|5.10|4.66|4.26|3.43|3.12|
|MF-USML650|9.56|8.65|7.67|6.50|5.53|5.05|4.62|3.71|3.38|
|MF-USML700|10.29|9.31|8.26|7.00|5.96|5.44|4.97|3.99|3.64|



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-USML Series - Low Ohmic PTC Resettable Fuses** 

## ~~**Solder Refow Recommendations**~~ 

|TP<br>TL<br>T MAX.<br>S<br>T<br>MIN.<br>25<br>S<br>**Temperature**||||tp|TP<br><br>T<br>TO<br>L<br>t L<br>CRITICAL ZONE<br>RAMP-DOW|TP<br><br>T<br>TO<br>L<br>t L<br>CRITICAL ZONE<br>RAMP-DOW|
|---|---|---|---|---|---|---|
|||RAMP-UP|||||
||||||||
||||||||
||||||||
||||||||
||||||||
|||t  25 *C TO PEAK|||8 MINS.||
||||||||
|||**Time**<br>|||||
||||||||
|||**Profle Feature**||||**Pb-Free Assembly**|
|Average|Ramp-Up Rate (TSmaxto Tp)|||||3 °C / second max.|
|PREHEAT:<br>Temperature Min. (TSmin)<br>Temperature Max. (TSmax)<br>Time (tsminto tsmax)<br>TIME MAINTAINED ABOVE||||||150 °C<br>200 °C<br>60~180 seconds|
|:<br>Temperature (TL)<br>Time (tL)||||||217 °C<br>60~150 seconds|
|Peak / Classifcation Temperature (TP)||||||260 °C|
|Time within 5 °C of Actual Peak Temperature (tp)||||||20~40 seconds|
|Ramp-Down Rate||||||6 °C / second max.|
|Time within 25 °C to Peak Temperature||||||8 minutes max.|



**==> picture [329 x 170] intentionally omitted <==**

**----- Start of picture text -----**<br>
How to Order Typical Part Marking<br>MF - USML 175  -  2 Represents total content. Layout may vary.<br>Multifuse [®]  Product   PART IDENTIFICATION:<br>Designator MF-USML175  = U17<br>Series  MF-USML190  = U19MF-USML200  = U20<br>USML = 1210 Low-Ohmic   MF-USML230  = U23<br>Surface Mount Component MF-USML250  = U25<br>U30 MF-USML270  = U27<br>Hold Current, Ihold  MF-USML300  = U30<br>175 - 700 (1.75 - 7.00 Amps)  MF-USML350  = U35<br>MF-USML380  = U38<br>Packaging  MF-USML400  = U40<br>Packaged per EIA 481-1  MF-USML450  = U45<br>-2 = Tape and Reel MF-USML500  = U50<br>MF-USML600  = U60<br>MF-USML650  = U65<br>MF-USML700  = U70<br>MANUFACTURING DATE CODE IS<br>LOCATED ON PACKING LABEL.<br>**----- End of picture text -----**<br>


**Asia-Pacific:** Tel: +886-2 2562-4117 Email: asiacus@bourns.com 

**Europe:** 

Tel: +36 88 520 390 Email: eurocus@bourns.com **The Americas:** Tel: +1-951 781-5500 Email: americus@bourns.com **www.bourns.com** 

MF-USML SERIES, REV. F, 05/17 

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-USML Series - Low Ohmic PTC Resettable Fuses** 

|**Tape Dimensions**|**Tape Dimensions**|**Tape Dimensions**|**Tape Dimensions**|**Tape Dimensions**|||||||||||||||**MF-USML Series**<br>**per EIA 481-2**|**MF-USML Series**<br>**per EIA 481-2**||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|W|||||||||||||||||||12.0 ± 0.3<br>(0.472 ± 0.012)|||
|P0|||||||||||||||||||4.0 ± 0.1<br>(0.157 ± 0.004)|||
|P1|||||||||||||||||||4.0 ± 0.1<br>(0.157 ± 0.004)|||
|P2|||||||||||||||||||2.0 ± 0.05<br>(0.079 ± 0.002)|||
|A0|||||||||||||||||||2.9 ± 0.10<br>(0.114 ± 0.004)|||
|B0|||||||||||||||||||3.50 ± 0.10<br>(0.138 ± 0.004)|||
|B1 max.||||||||||||||||||||4.5<br>(0.177)||
|D0||||||||||||||||||(|1.5 + 0.1/-0.0<br>0.059 + 0.004/-0)|||
|F|||||||||||||||||||5.5 ± 0.05<br>(0.216 + 0.002)|||
|E1|||||||||||||||||||1.75 ± 0.10<br>(0.069 ± 0.004)|||
|E2 typ.||||||||||||||||||||10.25<br>(0.404)||
|T max.||||||||||||||||||||0.6<br>(0.024)||
|T1 max.||||||||||||||||||||0.1<br>(0.004)||
|K0 (MF-USML175~MF-USML400)|||||||||||||||||||0.65 ± 0.10<br>(0.026 ± 0.004)|||
|K0 (MF-USML450~MF-USML700)|||||||||||||||||||1.10 ± 0.10<br>(0.043 ± 0.004)|||
|Leader min.||||||||||||||||||||390<br>(15.35)||
|Trailer min.||||||||||||||||||||160<br>(6.30)||
|**Reel Dimensions**||||||||||||||||||||||
|A max.||||||||||||||||||||185<br>(7.283)||
|N min.||||||||||||||||||||50<br>(1.97)||
|W1||||||||||||||||||(|12.4 + 1/-0<br>0.488 + 0.039/-0)|||
|W2 ma|||x.|||||||||||||||||15.4<br>(0.606)||
|B1|||||P|||||||||||B0<br>F<br>E2<br>E1<br>W|||||MM|
||||||||||||||||||||||(INCHES)|
||||T<br>COVER<br>TAPE<br>K0<br>T1<br>D0||||||P2<br>0|||||||E1||||||
||||||||||||||||||A||W|||
|||||||||||||||||||||||
|||||||||||||||||||||||
||B1||||||||||||||||||<br>W|||
|||||||||||||||||||||||
|||||||||||||||||||||||
|||||||A0||P1||||||||||||||
|||||||||||||||||||||||
|||||||||||||||||||||||



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.

About Novapart

Novapart is a B2B electronic component broker specialising in stock shortages and cost reduction. We source hard-to-find parts and identify compliant alternatives across a catalogue of 410,000+ components from 500+ manufacturers.

Learn more →

Stock Shortage Specialist

When a component is unavailable, discontinued or has an unacceptable lead time, we tap into our network of vetted European and Asian distributors to source what you need — without compromising on quality or traceability.

Request a quote →

Compliant Alternatives

We identify pin-to-pin, electrically equivalent substitutes that meet the same certifications (RoHS, AEC-Q100, REACH) as your original specification — validated against datasheets, not just part numbers. Often at a lower cost.

BOM Analysis service →