Printer Friendly

FreeXpansion Fuse PTC Resettable Patented | Bourns

Part Number Information
Part #:Price/Availability:
MF-LSMFBuy Now button
MF-SMDFBuy Now button
MF-MSMFBuy Now button
MF-USMFBuy Now button
MF-NSMFBuy Now button
MF-PSHTBuy Now button
MF-PSMFBuy Now button
MF-FSMFBuy Now button
Patented freeXpansion PTC Resettable Fuse | Bourns

Bourns® freeXpansion™ PTC Resettable Fuse designs allow the polymer material to freely expand and contract during temperature changes. This reduces the internal stresses on the material, resulting in improved performance manifested in three areas: a greatly reduced aging characteristic due to repeated operations, improved reliability and higher withstand voltages.


Bourns® freeXpansion™ PTC devices are currently available in the following sizes (Click for Datasheets):

Features & Benefits:

  • More stable resistance after tripping versus industry standard resettable fuse (see chart under additional information)
  • Resettable protection
  • Miniature surface mount footprints: 0603
  • RoHS compliant and Halogen free


  • USB port
  • HDMI ports
  • PoE – Power Over Ethernet
  • Battery:
    • Charges
    • Packs
    • Cells
  • Automotive electronics
  • Medical equipment

Additional Information: