Multifuse® MF-FSMF PTC

Part Number Information
Part #: Price/Availability:
MF-FSMF0 Buy Now

Bourns new MF-FSMF Series of Multifuse® polymer PTC resettable fuses are 0603 (1608 Metric) sized surface mount devices. This PTC Series is now Bourns’ smallest size resettable fuse and one of the smallest PTCs on the market. With the continued drive towards miniaturization, Bourns has launched this product family to assist handheld electronics manufacturers to protect their circuits with the smallest possible resettable fuse. The compact MF-FSMF series uses the new freeXpansion™ design that increases the performance of the resettable fuse with: • Higher hold currents (Ihold) • Higher voltages (Vmax) • Improved resistance stability • Smaller footprints This new Multifuse® MF-FSMF Series is RoHS compliant, halogen free and UL certified for safety requirements. In addition to the small size, it is one of the fastest operating PTCs with operating currents up to 500 mA on the market today.


  • Compact design to save board space - 0603 footprint
  • Small size results in very fast time to react to fault events
  • Low profile
  • RoHS compliant and halogen free
  • Agency recognition


  • USB port protection
  • PC motherboards - Plug and Play protection
  • Mobile phones - Battery and port protection
  • PDAs / digital cameras
  • Automotive electronic control modules
  • Game console port protection
  • HDMI ports