We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Cylindrical white fuse with silver end caps

Bussmann

Bussmann DFJ-3 3A 600V AC Class J Fast-Acting line protection

SKU CH-6HCR-WTZKT

A 3 A fast-acting Class J fuse rated 600 V AC and 450 V DC with a 200 kA interrupt rating at 600 V AC

  • Fast-acting protection clears faults in milliseconds
  • 600 V AC rating suits industrial power circuits
  • 200 kA interrupt capacity handles severe short circuits
  • 450 V DC rating supports battery and solar systems
  • Cylindrical 13/16 in diameter fits standard Class J blocks

Purpose and fit

The Bussmann DFJ-3 is a 3 A Class J fast-acting fuse rated for 600 V AC and 450 V DC. It suits engineers and maintenance teams who need reliable line protection for control circuits, small motor loads or lighting panels where a cylindrical non-indicating fuse is specified.

Thermals noise and power

The fuse operates silently with no moving parts and draws only the nominal load current until a fault occurs. Its melamine body withstands normal temperature rise in enclosed fuse blocks, while the 200 kA interrupt rating at 600 V AC and 100 kA at 450 V DC ensure safe energy dissipation during short-circuit events.

Replacement and upgrade scope

This fuse replaces any DFJ, HSJ or LDFJ series fuse of the same 3 A rating in compatible CH30J, JM600, JP600, JT600 or JTN600 blocks. The jump is worthwhile when existing fuses lack the 200 kA AC interrupt capacity or when a non-indicating cylindrical body matches the block design. Buyers who need visual indication or a different ampere rating should look elsewhere.

Highlights

  • Fast-acting protection clears faults in milliseconds
  • 600 V AC rating suits industrial power circuits
  • 200 kA interrupt capacity handles severe short circuits
  • 450 V DC rating supports battery and solar systems
  • Cylindrical 13/16 in diameter fits standard Class J blocks

Specifications

BrandEATON BUSSMANN

Questions about this item

How is the 2-1/4 in cylindrical fuse installed in a CH30J block, and what step is often missed?

Insert the 13/16 in diameter ferrule ends firmly into the block clips until fully seated; the step often missed is verifying clip tension so the fuse does not loosen under vibration.

What maintenance or replacement will the DFJ-3 need after a fault event?

The fast-acting element is single-use; after any over-current interruption the entire 3 A fuse must be replaced with an identical DFJ-series unit.

At what sustained current does the 3 A rating become the limiting factor?

The 3 A rating is the continuous limit; sustained loads above 3 A will cause the element to open, so the circuit must stay at or below 3 A.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.