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Cylindrical beige fuse with metal end caps, bolt-on style

Bussmann

Bussmann DFJ-100 J Class Fuse 100A 600V AC Fast-Acting Line Protection

SKU CH-FVGW-CRT7N

A 100 A fast-acting Class J fuse rated for 600 V AC and 450 V DC with a 200 kA interrupt rating

  • 100 A fast-acting protection for high-current circuits
  • 200 kA interrupt rating at 600 V AC handles severe faults
  • 450 V DC rating with 100 kA interrupt covers DC applications
  • Class J bolt-on design fits standard JM600 fuse blocks
  • Melamine body provides reliable insulation for line protection

Bussmann DFJ-100 J Class Fuse

The Bussmann DFJ-100 is a fast-acting J Class fuse rated at 100A and 600V AC for line protection. It features a bolt-on body style designed for non-rejection fuse blocks. The melamine body houses a single element with a 200kA interrupt rating at 600V AC. This fuse suits industrial and commercial electrical panels requiring reliable overcurrent protection.

Sustained load behaviour

Under continuous operation the fuse carries its rated 100A without nuisance opening. The fast-acting characteristic clears short-circuit faults quickly to limit let-through energy. At 450V DC it provides a 100kA interrupt rating for DC circuit protection. The non-indicating design means visual inspection or testing is required after a fault event.

Decisive specification

The 100A 600V AC rating with 200kA interrupt capacity determines suitability for a given panel. Buyers needing a higher ampere rating or a different voltage class must select another fuse. The bolt-on mounting and non-rejection block compatibility fix the installation format. Confirm the fuse block series matches JM600 or equivalent before purchase.

Highlights

  • 100 A fast-acting protection for high-current circuits
  • 200 kA interrupt rating at 600 V AC handles severe faults
  • 450 V DC rating with 100 kA interrupt covers DC applications
  • Class J bolt-on design fits standard JM600 fuse blocks
  • Melamine body provides reliable insulation for line protection

Specifications

BrandEATON BUSSMANN

Questions about this item

How much heat does the 100 A DFJ fuse generate when carrying full load all day?

The fuse is rated for continuous 100 A at 600 V AC; power loss equals the voltage drop across the element times 100 A, which is determined by the fuse's published watts-loss curve.

What fuse block must already be installed for this bolt-on DFJ-100 to fit?

It fits JM600 series fuse blocks that accept non-rejection Class J bolt-on bodies.

Will the 200 kA interrupt rating at 600 V AC protect older 600 V switchgear on the same circuit?

Yes, the 200 kA interrupt rating at 600 V AC provides high short-circuit protection for existing 600 V equipment downstream.

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