Image not available
Illustrative purposes only
MF-LSMF260X-2
Resettable Fuse, PPTC, 2920 (7351 Metric), MF-LSMF, 24 VDC, 2.6 A, 5.2 A, 5 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
- Thermistor Mounting:SMD; Product Range:MF-LSMF Series; Holding Current:2.6A; Tripping Current:5.2A; Voltage Rating:24V; Operating Temperature Min:-40°C; Operating Temperature Max:85
- SVHC: No SVHC (04-Feb-2026)
- Time to Trip: 5s
- Trip Current: 5.2A
- Product Range: MF-LSMF
- Voltage Rating: 24VDC
- Holding Current: 2.6A
- PPTC Case Style: 2920 (7351 Metric)
- Current Rating Max: 20A
- Thermistor Mounting: SMD
- Operating Temperature Max: 85°C
- Operating Temperature Min: -40°C
- Automotive Qualification Standard: AEC-Q200
| Delivery and price | |
|---|---|
| Units per pack | 4000 |
| Price | 0.315 € |
| Current stock | 1000+ |
| Lead time | 30 days |
Datasheet
## **Features** **==> picture [497 x 273] intentionally omitted <==** **----- Start of picture text -----**<br> ||||||||||| |---|---|---|---|---|---|---|---|---|---| |n|High power ratings|n|Surface mount packaging for automated| |n|Compliant with AEC-Q200 Rev-C- Stress|assembly| |Test Qualification for Passive Components|n|Agency recognition:| |in Automotive Applications|n|Standard 7555 mm (2920 mils) footprint| |n|Low profile| |€|n|Compatible with Pb and Pb-free solder| |reflow profiles| |n|RoHS compliant* and halogen free**| |BOURNS|MF-LSMF Series - PTC Resettable Fuses| |Electrical Characteristics| |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| |Hold|Trip|RMin.|R1Max.|Typ.| |MF-LSMF185/33X|33.0|40|1.85|3.70|0.045|0.150|8.0|2.50|1.5| |po|Rs|ee|(| |MF-LSMF260X|24.0|20|2.60|5.20|0.020|0.075|8.0|5.00|1.5| |po| |MF-LSMF300X|6.0|40|3.00|5.00|0.015|0.048|8.0|20.00|1.5| |po| |MF-LSMF300/24X|24.0|20|3.00|5.20|0.020|0.075|8.0|5.00|1.5| |po| |MF-LSMF400/12X****|12.0|20|4.00|8.00|0.005|0.050|8.0|15.00|1.5| |PO| **----- End of picture text -----**<br> *** Features Multifuse[®] Free Xpansion Design[™] for MF-LSMF Series. **** UL approval pending. ## ~~**Environmental Characteristics**~~ Operating Temperature ......................................... -40 °C to +85 °C Passive Aging ....................................................... +85 °C, 1000 hours ............................................... ±5 % typical resistance change Humidity Aging...................................................... +85 °C, 85 % R.H. 1000 hours ............................. ±5 % typical resistance change Thermal Shock ..................................................... +85 °C to -40 °C, 20 times .................................... ±10 % 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-LSMF Series**~~ **==> picture [460 x 121] 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| |UL File Number .................................................... E174545| |http://www.ul.com/ Follow link to Certifications, then UL File No., enter E174545| |TÜV Certificate Number ....................................... R 50256634| |http://www.tuvdotcom.com/ Follow link to “Certificate Search”, enter 50256634| **----- 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. ## **Applications** n Automotive electronics n Industrial controls n IEEE ports n Portable electronics ## **MF-LSMF Series - PTC Resettable Fuses** ## ~~**Product Dimensions**~~ |**Model**||**A**||**B**|**B**|||**C**|**C**|||**D**||**E**|**E**||| |---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---| |||Min.|Max.|Min.||Max.||Min.||Max.||Min.||Min.||Max.|| |MF-LSMF185/33X||6.73<br>(0.265)|7.98<br>(0.312)|4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.60<br>(0.063)||0.30<br>(0.012)||0.25<br>(.010)||2.00<br>(.079)|| |MF-LSMF260X||6.73<br>(0.265)|7.98<br>(0.312)|4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.60<br>(0.063)||0.30<br>(0.012)||0.25<br>(.010)||2.00<br>(.079)|| |MF-LSMF300X||6.73<br>(0.265)|7.98<br>(0.312)|4.80<br>(0.189)||5.44<br>(0.214)||0.35<br>(0.014)||0.85<br>(0.033)||0.30<br>(0.012)||0.25<br>(.010)||2.00<br>(.079)|| |MF-LSMF300/24X||6.73<br>(0.265)|7.98<br>(0.312)|4.80<br>(0.189)||5.44<br>(0.214)||0.75<br>(0.030)||1.60<br>(0.063)||0.30<br>(0.012)||0.25<br>(.010)||2.00<br>(.079)|| |MF-LSMF400/12X||6.73<br>(0.265)|7.98<br>(0.312)|4.80<br>(0.189)||5.44<br>(0.214)||0.65<br>(0.026)||1.60<br>(0.063)||0.30<br>(0.012)||0.25<br>(.010)||2.00<br>(.079)|| |Packaging: 3000 pcs. per reel.||||||||||||||DIMENSIONS:|||MM| ||||||||||||||||||(INCHES)| Packaging: 3000 pcs. per reel. **==> picture [503 x 92] intentionally omitted <==** **----- Start of picture text -----**<br> Top View Bottom View Side View Recommended Pad Layout<br>A C Terminal material:<br>Electroless Ni under immersion Au<br>9<br>5.3 ± 0.10 Termination pad solderability:<br>B (.209 ± .004) Standard Au fnish:<br>Meets ANSI/J-STD-002 Category 2.<br>X<br>Recommended Storage:<br>D E 2.0 ± 0.05 4.6 ± 0.10 40 °C max./70 % RH max.<br>(.079 ± .002) (.181 ± .004)<br>**----- End of picture text -----**<br> ## ~~**Typical Time to Trip at 23 ˚C**~~ **==> picture [242 x 228] intentionally omitted <==** **----- Start of picture text -----**<br> 100<br>MF-LSMF260X<br>10<br>MF-LSMF185/33X<br>MF-LSMF400/12X<br>1<br>MF-LSMF300/24X<br>MF-LSMF300X<br>0.1<br>0.01<br>1 10 100<br>Fault Current (Amps)<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. 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-LSMF Series - PTC Resettable Fuses3312 - 2 mm SMD Trimming Potentiometer** ## ~~**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-LSMF185/33X|2.80|2.47|2.17|1.85|1.54|1.39|1.22|1.07|0.85| |MF-LSMF260X|3.75|3.35|3.00|2.60|2.35|2.15|2.05|1.80|1.30| |MF-LSMF300X|4.53|4.02|3.51|3.00|2.52|2.26|1.99|1.75|1.34| |MF-LSMF300/24X|4.00|3.55|3.20|3.00|2.50|2.25|2.15|1.85|1.50| |MF-LSMF400/12X|5.30|4.70|4.25|4.00|3.30|3.00|2.85|2.45|2.00| ## ~~**Solder Refow Recommendations**~~ **==> picture [236 x 161] intentionally omitted <==** **----- Start of picture text -----**<br> Preheating Soldering Cooling<br>300<br>250<br>200<br>150<br>100<br>50<br>0<br>160–220 10–20 120<br>Time (seconds)<br>C)ϒ<br>Temperature (<br>**----- End of picture text -----**<br> ## **Notes:** - MF-LSMF models cannot be wave soldered. Please contact Bourns for hand soldering ## ~~**How to Order**~~ **==> picture [155 x 140] intentionally omitted <==** **----- Start of picture text -----**<br> MF - LSMF 185/33X - 2<br>Multifuse [®] Product<br>Designator<br>Series<br>LSMF = 7555 mm (2920 mils)<br>Surface Mount Component<br>Hold Current, Ihold<br>185-400 (1.85 Amps - 4.00 Amps)<br>Higher Voltage Option<br>/12 = 12 Volt Rated<br>/24 = 24 Volt Rated<br>/33 = 33 Volt Rated<br>X = Multifuse [®] freeXpansion [™] Design<br> MF-LSMF Series<br>Packaging<br>Packaged per EIA 481-1<br>-2 = Tape and Reel<br>**----- End of picture text -----**<br> ## ~~**Typical Part Marking**~~ Represents total content. Layout may vary. - recommendations. - If reflow temperatures exceed the recommended profile, devices may not meet the performance requirements. - Compatible with Pb and Pb-free solder reflow profiles. **==> picture [145 x 68] intentionally omitted <==** **----- Start of picture text -----**<br> PART IDENTIFICATION EXAMPLES:<br>MF-LSMF185/33X = 9<br>MF-LSMF260X = E<br>MF-LSMF300X = F<br>E MF-LSMF300/24X = J<br>MF-LSMF400/12X = K<br>X BI-WEEKLY DATE CODE:<br>WEEKS 47-48 = X<br>**----- End of picture text -----**<br> MF-LSMF 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-LSMF Series Tape and Reel Specifications** _NOTE: Effective December 1, 2010 (product date code “X”), the cover tape was changed to the new 3M[™] Universal Cover Tape (UCT)._ |**Tape Dimensions**|**Tape Dimensions**|**Tape Dimensions**|**Tape Dimensions**|**Tape Dimensions**|||||||||||||**MF-LSMF185/33X, MF-LSMF260X,**<br>**MF-LSMF300X**<br>**MF-LSMF300/24X, MF-LSMF400/12X**<br>**per EIA 481-2 **<br>**per EIA 481-2**|**MF-LSMF185/33X, MF-LSMF260X,**<br>**MF-LSMF300X**<br>**MF-LSMF300/24X, MF-LSMF400/12X**<br>**per EIA 481-2 **<br>**per EIA 481-2**|**MF-LSMF185/33X, MF-LSMF260X,**<br>**MF-LSMF300X**<br>**MF-LSMF300/24X, MF-LSMF400/12X**<br>**per EIA 481-2 **<br>**per EIA 481-2**|**MF-LSMF185/33X, MF-LSMF260X,**<br>**MF-LSMF300X**<br>**MF-LSMF300/24X, MF-LSMF400/12X**<br>**per EIA 481-2 **<br>**per EIA 481-2**|**MF-LSMF185/33X, MF-LSMF260X,**<br>**MF-LSMF300X**<br>**MF-LSMF300/24X, MF-LSMF400/12X**<br>**per EIA 481-2 **<br>**per EIA 481-2**| |---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---| |W|||||||||||||||||16.0 ± 0.30<br>(0.630 ± 0.012)|||16.0 ± 0.30<br>(0.630 ± 0.012)|| |P0|||||||||||||||||4.0 ± 0.10<br>(0.157 ± 0.004)|||4.0 ± 0.10<br>(0.157 ± 0.004)|| |P1|||||||||||||||||8.0 ± 0.10<br>(0.315 ± 0.004)|||8.0 ± 0.10<br>(0.315 ± 0.004)|| |P2|||||||||||||||||2.0 ± 0.05<br>(0.079 ± 0.002)|||2.0 ± 0.05<br>(0.079 ± 0.002)|| |A0|||||<br>||||||||||||5.74 ± 0.10<br>(0.226 ± 0.004)|||5.70 ± 0.10<br>(0.224 ± 0.004)|| |B0|||||||||||||||||8.02 ± 0.10<br>(0.316 ± 0.004)|||8.10 ± 0.10<br>(0.319 ± 0.004)|| |B1 max.||||||||||||||||||12.1<br>(0.476)||12.1<br>(0.476)|| |D0|||||<br>|||||||||||1.5 + 0.10/-0.0<br>(0.059 + 0.004/-0)||||1.5 + 0.10/-0.0<br>(0.059 + 0.004/-0)|| |F|||||||||||||||||7.5 ± 0.05<br>(0.295 ± 0.002)|||7.5 ± 0.05<br>(0.295 ± 0.002)|| |E1|||||<br>||||||||||||1.75 ± 0.10<br>(0.069 ± 0.004)|||1.75 ± 0.10<br>(0.069 ± 0.004)|| |E2 min.||||||||||||||||||14.25<br>(0.561)||14.25<br>(0.561)|| |T max.|||||<br>|||||||||||||0.6<br>(0.024)||0.6<br>(0.024)|| |T1 max.|||||<br>|||||||||||||0.1<br>(0.004)||0.1<br>(0.004)|| |K0|||||||||||||||||0.91 ± 0.10<br>(0.036 ± 0.004)|||1.70 ± 0.10<br>(0.067 ± 0.004)|| |Leader min.|||||<br>|||||||||||||390<br>(15.35)||390<br>(15.35)|| |Trailer min.|||||<br>|||||||||||||160<br>(6.30)||160<br>(6.30)|| |**Reel Dimensions**|||||||||||||||||||||| |A max.||||||||||||||||||331<br>(13.03)||331<br>(13.03)|| |N min.||||||||||||||||||50<br>(1.97)||50<br>(1.97)|| |W1||||||||||||||||||||16.4 + 2.0/-0.0<br>(0.646 + 0.079/-0.0)|| |W2 max.||||||||||||||||||22.4<br>(0.882)||22.4<br>(0.882)|| |B1|||||P||||||||||||||||MM| ||||T<br>COVER<br>TAPE<br>K0<br>T1<br>D0||||||P2<br>0|||||||||E1|||| |||||||||||||||||||E2<br>W|||| |||||||||||||||||F<br>|||||| ||B1||||||||||||||||||||| ||||||||||||||||||||||| ||||||||||||||||||||||| |||||||A0||P1|||||||||||||| ||||||||||||||||||||||| ||||||||||||||||||||||| ||||The device characteristics and parameters in this data sheet can|||||||||||||||||||
Updated at June 8, 2026
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 →