ON Semiconductor

ON Semiconductor NIS4461 Series eFuses

Resettable to protect circuits operating at input voltages up to 30V

ON Semiconductor NIS4461 series of resettable electronic fuses extends its portfolio of eFuse products, providing cost-effective circuit protection for motors, power supplies and other applications that have a maximum input voltage of 30V.


ON Semiconductor’s resettable eFuses have a programmable current limit and include integrated over-current, over-temperature, over-voltage and reverse-current protection. Signals for fault reporting and for disabling the output may be transmitted via general-purpose I/Os.


The NIS4461 buffers the load from excessive input voltages which could damage sensitive circuits.  It includes an over-voltage clamp circuit which prevents voltage spikes from reaching the load while allowing the load circuit to continue operating.


The NIS4461 offers a choice of operating modes when triggered, either latch-off, or auto-retry for restarting.


  • Programmable over-current protection
  • Programmable slew rate
  • Low quiescent current
  • Built-in current sensing
  • Thermal shut-down protection
  • 50mΩ maximum on-resistance


  • Server power supplies
  • Backplane protection
  • Industrial automation
  • ADAS
  • Lighting
  • Telematics systems
  • Hot-plug fan
  • Computer storage
ON Semiconductor — NIS4461 Series eFuses

Development Kit

Kit part number: NIS4461MT1GEVB


This evaluation board for the NIS4461 eFuse includes an NPN bipolar transistor and an N-channel 60V MOSFET.

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