Bourns Announces Expansion of High Power PPTC Resettable Fuses

The Bourns Multifuse Product Line is pleased to announce the expansion of its Model MF-LSMF Series High Power Surface Mount Polymeric Positive Temperature Coefficient (PPTC) Resettable Fuses.

The latest MF-LSMF model family utilizes Bourns’ innovative freeXpansion™ design to increase the performance of the resettable fuse with higher hold currents (Ihold), higher voltages (Vmax), improved resistance stability, and smaller footprints. The primary applications for these products include Li-ion battery packs, low voltage telecom equipment, motherboards, and portable consumer electronics protection.

The new models expand the hold current range to 0.75 A ~ 6.0 A with maximum voltages of 6 ~ 33 VDC and twenty options available.

These devices have been designed to protect against both overcurrent and overtemperature events within the designated product specifications.

Bourns High Power PPTC Resettable Fuses Characteristics

The new Model MF-LSMF Multifuse® PPTC products are RoHS compliant* and UL/CSA/TÜV recognized for safety requirements and are produced in Bourns’ IATF 16949 certified facility in Xiamen, China.


  • Multifuse® freeXpansion™ Design
  • Higher voltage (Vmax): up to 33 VDC
  • Higher current (Ihold): up to 6 A
  • Footprint: 7451 mm (2920 mils) package
  • RoHS compliant and halogen free

Overcurrent and thermal protection for:

  • Low voltage telecom equipment
  • Li-ion battery pack charging
  • PC motherboards
  • Game consoles
  • Portable consumer electronics
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