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Cylindrical beige fuse with silver end caps, 2 1/4 inches long, 13/16 inch diameter

Bussmann

Bussmann DFJ-5 5A 600V AC Class J Fast-Acting Fuse

SKU CH-NATN-1P2BG

A 5 A, 600 V AC Class J fast-acting fuse with 200 kA interrupt rating for high-current circuit protection

  • Fast-acting protection clears faults quickly
  • 200 kA interrupt rating handles severe short circuits at 600 V AC
  • 100 kA DC rating covers 450 V DC systems
  • Class J design fits standard CH30J and JM600 fuse blocks
  • Melamine body resists heat and tracking in harsh environments

5A 600V AC Class J Fast-Acting Fuse

The Bussmann DFJ-5 is a Class J fuse rated at 5 amps and 600 volts AC with a 450 volt DC rating. It features a fast-acting, single-element design in a cylindrical melamine body measuring 2-1/4 inches long by 13/16 inches in diameter. The fuse carries an interrupt rating of 200kA at 600V AC and 100kA at 450V DC for high fault current protection.

Electrical panels needing Class J rejection-style

This fuse suits industrial control panels, motor circuits, and transformer primaries requiring Class J fast-acting characteristics. It fits non-rejection fuse blocks including CH30J, JM600, JP600, JT600, and JTN600 series. Buyers needing time-delay characteristics or visual blow indication should look at alternative fuse types as this is a non-indicating, fast-acting model.

Cross-reference compatibility simplifies replacement

The DFJ series crosses directly to Littelfuse LDFJ and Mersen HSJ equivalents, allowing drop-in substitution across brands. Its standard Class J dimensions ensure fit in existing compatible fuse blocks without hardware changes. The melamine body construction provides reliable insulation for the rated voltage levels.

How it compares

Measured against everything we stock in Breakers & Circuit Protection, at today’s prices. Recalculated every night.

Price $39.99
Cheaper than about 63% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameEATON BUSSMANN

Questions about this item

Which fuse block series will accept this 5 A Class J fuse?

The DFJ-5 fits CH30J, JM600, JP600, JT600 and JTN600 fuse block series.

Can this fuse protect a circuit that also uses 30 A Class J fuses?

Yes, the same CH30J, JM600, JP600, JT600 and JTN600 blocks accept both 5 A and 30 A Class J fuses.

How can I confirm the fuse has interrupted a fault after installation?

The DFJ-5 is non-indicating, so you must test circuit continuity with a multimeter to verify it has opened.

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