FTM Board Club
NIS4461 Electronic Fuses Circuit Protection Evaluation Board

onsemi has extended its portfolio of resettable electronic Fuse (eFuse) products, introducing the NIS4461 series to provide cost-effective circuit protection for motors, power supplies and other applications that have a maximum input voltage of 30V.

onsemi’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. An over-voltage clamp circuit is included 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