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Cylindrical beige fuse with silver end caps 25A 600V AC Class J

Bussmann

Bussmann DFJ-25 25A 600V AC Class J Fast-Acting Fuse

SKU CH-0828-GH9JD

Fast-acting 25 A Class J fuse rated 600 V AC with 200 kA interrupt capacity

  • Fast-acting protection for sensitive circuits with 25A rating
  • High interrupt capacity handles 200kA at 600V AC faults
  • Compact cylindrical design fits standard Class J fuse blocks
  • Dual AC/DC voltage rating covers 600V AC and 450V DC systems
  • Melamine body provides reliable insulation in demanding environments

25 A 600 V AC Class J fuse

This 25 A fast-acting fuse protects circuits up to 600 V AC and 450 V DC. Its cylindrical melamine body measures 2-1/4 in long by 13/16 in diameter and carries a 200 kA interrupt rating at 600 V AC. It fits non-rejection style fuse blocks including the CH30J, JM600, JP600, JT600 and JTN600 series. The unit is new and ready for industrial or commercial installation.

Interrupt ratings and voltage limits

The fuse clears faults up to 200 kA at 600 V AC and 100 kA at 450 V DC. Operation above these voltages or interrupt levels is not supported by the device ratings. The fast-acting characteristic provides rapid response to overcurrents but does not offer time-delay for motor starting surges. Users must verify that the available fault current and system voltage stay within the stated limits.

Replaces DFJ LDFJ HSJ series fuses

This DFJ-25 replaces Bussmann DFJ, Littelfuse LDFJ and Mersen HSJ fuses of the same ampere and voltage rating. The upgrade is worthwhile when a 200 kA AC interrupt rating is required or when standardising on the DFJ series across a facility. It does not suit applications needing an indicating fuse or a rejection-style block. Buyers who need a time-delay characteristic or a different ampere rating should select another series.

Highlights

  • Fast-acting protection for sensitive circuits with 25A rating
  • High interrupt capacity handles 200kA at 600V AC faults
  • Compact cylindrical design fits standard Class J fuse blocks
  • Dual AC/DC voltage rating covers 600V AC and 450V DC systems
  • Melamine body provides reliable insulation in demanding environments

Specifications

BrandEATON BUSSMANN

Questions about this item

Should I pick the 25 A or 30 A version for a 600 V AC panel?

The 25 A rating matches the 25 A nameplate current of this DFJ-25 fuse; the 30 A figure only appears in compatible fuse-block series numbers.

What does the 200 kA interrupt rating at 600 V AC mean once the fuse is installed?

It means the fuse can safely clear a 200 000 A short-circuit on a 600 V AC system without rupturing.

Which fuse-block interface does the Class J cylindrical body fit, and what current does that cap?

It fits non-rejection CH30J, JM600, JP600, JT600 and JTN600 blocks, which are rated for 30 A Class J circuits.

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