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White cylindrical fuse with silver end caps, 45A 600V AC rating visible

Bussmann

Bussmann DFJ-45 UL Class Fuse J Class Fast-Acting 45A 600V AC line protection

SKU CH-D3KF-W5QV4

A 45 A, 600 V AC fast-acting Class J fuse with a 200 kA interrupt rating for line protection

  • Fast-acting protection clears faults quickly
  • 45 A rating matches common industrial circuits
  • 600 V AC rating suits standard three-phase supplies
  • 200 kA interrupt capacity handles heavy fault currents
  • Class J design fits CH60J and JT600 fuse blocks

Bussmann DFJ-45 J Class Fuse 45A 600V AC

This EATON BUSSMANN DFJ-45 is a UL Class J fast-acting fuse rated for 45 amperes and 600 volts AC. It provides line protection with a 200kA interrupt rating at 600V AC and 100kA at 450V DC. The cylindrical melamine body measures 2-3/8 inches long by 1-1/16 inches in diameter and fits non-rejection fuse blocks.

Suits 45A circuits needing fast-acting Class J

Installers protecting 45 ampere circuits at up to 600 volts AC will find this fuse matches the required ratings. It is not for circuits requiring time-delay or dual-element characteristics. Buyers needing indication features or rejection-style block compatibility should look elsewhere.

45 ampere rating at 600 volts AC defines

The 45A 600V AC rating is the primary specification that determines whether this fuse fits the circuit design. The fast-acting Class J response and 200kA interrupt capacity at 600V AC follow from this rating. Verify the circuit demands exactly 45 amperes and Class J fast-acting performance before selecting this part.

How it compares

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Price $69.99
Pricier than about 60% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameEATON BUSSMANN

Questions about this item

Will the DFJ-45 fuse coordinate with a 60 A upstream breaker in my existing panel?

The fuse is rated at 45 A and 600 V AC with a 200 kA interrupt rating; coordination with a 60 A breaker depends on the specific time-current curves of both devices, so consult the manufacturer’s coordination tables for the exact pairing.

How can I verify the DFJ-45 is intact after installation without an indicator window?

Because this is a non-indicating fuse, use a multimeter on the resistance or continuity setting across the fuse ends — a very low reading confirms the element is intact, while an open circuit means it has operated.

Does the package include a fuse block or do I need to buy a CH60J block separately?

The fuse is sold as a single cylindrical element only; a compatible fuse block such as the CH60J, JM600, JT600 or JTN600 series must be purchased separately.

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