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White ceramic bolt-on semiconductor fuse with metal end caps, 65A 660V AC rating

Bussmann

Bussmann 170N3437 Semiconductor Fuse 65A 660V AC Bolt-On

SKU CH-WEB7-TRERS

A fast-acting semiconductor fuse rated 65 A at 660 V AC with a 200 kA interrupt rating and bolt-on ceramic body

  • Fast-acting protection clears faults quickly
  • 65 A rating matches semiconductor load requirements
  • 660 V AC rating suits industrial power circuits
  • 200 kA interrupt rating handles high fault currents
  • Bolt-on ceramic body ensures secure panel mounting

Semiconductor Fuse 65A 660V AC

The Bussmann 170N3437 is a fast-acting semiconductor fuse rated at 65 amps and 660 volts AC. It belongs to the 170N series and uses a bolt-on body style for secure mounting. The ceramic body houses a single element designed to protect sensitive power electronics. This fuse suits engineers and maintenance teams specifying overcurrent protection for rectifiers, inverters, or DC drives.

Sustained Load Behaviour

The fuse carries its 65 amp rating continuously under normal conditions. During an overcurrent event the fast-acting element opens quickly to limit let-through energy. Its interrupt rating of 200 kA at 660V AC ensures safe circuit interruption even under high prospective fault currents. The indicating feature provides visual confirmation when the element has blown.

Installation and Common Issues

The bolt-on design requires matching mounting hardware and proper torque for a low-resistance connection. Installers must verify the physical envelope of 3-9/64 in length by 43/64 in width and depth fits the available space. A common error is reusing a blown fuse body or neglecting the indicating pin status during inspection. The non-rejection style means no keying prevents incorrect series substitution.

Highlights

  • Fast-acting protection clears faults quickly
  • 65 A rating matches semiconductor load requirements
  • 660 V AC rating suits industrial power circuits
  • 200 kA interrupt rating handles high fault currents
  • Bolt-on ceramic body ensures secure panel mounting

Specifications

BrandEATON BUSSMANN

Questions about this item

How much heat does the 65 A fuse generate during continuous all-day operation?

The ceramic body and single-element design dissipate heat effectively at the rated 65 A, keeping temperature rise within limits defined by the IEC standard for the 170N series.

What mounting hardware must I already have to install this bolt-on fuse?

You need a compatible bolt-on fuse block or busbar arrangement that accepts the 43/64 in diameter body and provides the correct bolt spacing for the 170N series.

Will the 200 kA interrupt rating coordinate with older 660 V AC switchgear I plan to keep?

Yes, the 200 kA rating at 660 V AC meets or exceeds the withstand capability of most legacy 660 V switchgear, allowing selective coordination when the fuse is sized correctly.

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