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Ceramic square-bodied semiconductor fuse with bolt-on terminals, indicating striker visible

Bussmann

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

SKU CH-TJH6-XQAP6

A 350 A, 690 V AC fast-acting semiconductor fuse with bolt-on ceramic body and 200 kA interrupt rating

  • Fast-acting protection for semiconductors with 350A rating
  • High interrupt capacity of 200kA at 690V AC
  • Ceramic body construction for reliable operation
  • Visual indication feature simplifies fault identification
  • Bolt-on mounting style enables secure installation

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.

Highlights

  • Fast-acting protection for semiconductors with 350A rating
  • High interrupt capacity of 200kA at 690V AC
  • Ceramic body construction for reliable operation
  • Visual indication feature simplifies fault identification
  • Bolt-on mounting style enables secure installation

Specifications

BrandEATON BUSSMANN

Questions about this item

How do I bolt on the 170M3018 fuse and what step is often missed?

Mount the ceramic body using the bolt-on terminals, then verify the indicating pin sits flush so the open-fuse signal works.

What part of the 170M3018 needs replacement after it operates?

The single-element ceramic fuse body is non-replaceable; once the 350 A element opens at 200 kA interrupting capacity, install a new 170M3018 unit.

At what current level does the 170M3018 reach its thermal limit first during sustained loading?

Continuous operation above the 350 A rating causes the fast-acting element to melt before the 690 V AC insulation or ceramic body degrades.

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