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Bourns - Multifuse® PPTC Resettable Fuses

Mixed Media - AAC201711 Bourns

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Featuring small package sizes from 1210 to 0805, the expanded Multifuse line delivers increased resettable fuse performance from higher hold currents (Ihold) up to 7.0 Amps, higher voltages (Vmax) and post trip resistance values as low as 12 mOhms for enhanced resistance stability. For example, providing ultra-low resistance values helps boost the line’s current-carrying capability where one model can now achieve a 7 A Ihold in a compact 1210 package (MF-USML700-2). These features enable longer battery life and faster charging in today’s smaller lithium-ion battery-based devices making the new models ideal resettable protection solutions for a wide range of portable electronic applications.

All the new Multifuse models are based on Bourns’ freeXpansion™ technology, which is a space-saving manufacturing process that enables smaller surface mount package sizes, while also making it possible for Multifuse® devices to handle larger currents and voltages with improved resistance stability.

“The ultra-low resistance, small footprint, and low profile all make our latest Multifuse® product series ideal protection solutions for a new generation of space-constrained portable devices including smartphones, tablets, wireless headphones, PC motherboards, USB drives and gaming consoles,” said Lee Bourns, Multifuse Product Line Manager at Bourns, Inc. “And because these devices are based on Bourns’ freeXpansion™ technology, they offer superior current, voltage and resistance performance over traditional PTC solutions for designs that require more advanced overcurrent and overtemperature protection.”


  • Small footprint size (0805) and low profile for space-constrained mobile applications
  • Ultra-low resistance
  • Symmetrical design
  • Surface mount packaging for automated assembly
  • RoHS compliant* and halogen free**


Target applications

  • USB port protection - USB 2.0, 3.0 & OTG
  • HDMI 1.4 Source protection
  • PC motherboards - Plug & Play protection
  • Mobile phones - Battery & port protection
  • PDAs / digital cameras
  • Bluetooth® earphone power protection
  • Game console port protection


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