Bussmann Fuse 275A – ANN-275

Rated at 275 amps, this Bussmann very fast acting limiter fuse protects the high-current battery and motor circuits of electric lift trucks against short circuits and overloads, cutting power quickly enough to save the downstream semiconductors and wiring. The ANN series is built for direct-current control work at up to 80 volts DC, along with 125 volts AC, which places it squarely in the voltage range of battery-powered material handling equipment.

The very fast acting design is the defining spec: unlike a time-delay fuse, a limiter clears a fault in milliseconds, holding down the peak energy that reaches the controller and motor before the circuit opens. That speed is what protects solid-state drive electronics, which fail far faster than a slow fuse would react.

Built by Bussmann and cataloged as a Crown electrical protection part, it seats in the ANN-style mounting. Match the amperage rating to the circuit it protects, since a fuse rated above the circuit's design current lets a damaging fault through before it opens, while one rated too low will nuisance-trip under normal load.