Bussmann 170M3018 350A 690V Fast-Acting line protection

Semiconductor fuse for 350 A circuits

The Bussmann 170M3018 is a fast-acting semiconductor fuse rated at 350 A and 690 V AC. It belongs to the 170M series and uses a bolt-on body style for secure mounting in industrial power equipment. The ceramic body houses a single element designed to protect sensitive semiconductor devices from short-circuit damage. It carries CE, IEC and UL recognition and meets RoHS requirements.

Thermal behaviour and interrupt capacity

The fuse operates with a fast-acting characteristic to limit let-through energy during fault conditions. Its interrupt rating is 200 kA at 690 V AC, allowing it to clear high prospective currents in heavy-duty installations. The indicating feature provides visual confirmation of fuse operation after an overcurrent event. Power dissipation during normal load follows the standard profile for this ampere rating and body size.

Direct replacement for 170M series fuses

This unit replaces any 170M series fuse with identical 350 A and 690 V AC ratings and the same bolt-on dimensions. The jump is worth it when an existing fuse has operated or when a scheduled maintenance interval calls for fresh protection. It is not suited for applications requiring a rejection-style body or a different voltage and current rating. Buyers needing a non-indicating version or a different case size should select an alternative part.