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Cylindrical fuse, melamine body, silver end caps, 2-1/4 in long, 13/16 in diameter

Bussmann

Bussmann DFJ-4 4A 600V AC J Class Fast-Acting line protection

SKU CH-V9T0-K157M

A 4 A, 600 V AC Class J fast-acting fuse with a 200 kA interrupt rating for line protection

  • Fast-acting response protects circuits quickly
  • 4 A rating at 600 V AC handles standard loads
  • 200 kA interrupt rating at 600 V AC stops severe faults
  • 100 kA interrupt rating at 450 V DC covers DC systems
  • Cylindrical 2-1/4 in × 13/16 in fits CH30J blocks

Bussmann DFJ-4 4A 600V AC J Class Fast-Acting Fuse

The Bussmann DFJ-4 is a UL Class J fast-acting fuse rated at 4 amperes and 600 volts AC. It provides high-interrupting protection for electrical circuits in industrial and commercial installations. The cylindrical melamine body measures 2-1/4 inches long by 13/16 inches in diameter. It fits non-rejection fuse blocks in the CH30J, JM600, JP600, JT600 and JTN600 series.

Suited for 4A branch circuits needing 200kA

This fuse suits engineers specifying overcurrent protection for 4A loads where a 200kA AC interrupt rating is required. It also covers 450V DC applications with a 100kA DC interrupt rating. Buyers needing visual indication of a blown element should look at indicating models. Installations requiring rejection-style blocks or a different ampere rating must select an alternative part.

Handles 4A continuous load

The DFJ-4 carries a 4A continuous load and safely interrupts up to 200kA at 600V AC or 100kA at 450V DC. It protects conductors and equipment on circuits within these voltage and current limits. Circuits exceeding 4A, 600V AC or 450V DC fall outside its ratings. Coordination with downstream devices should be verified for the specific fault-current levels present.

Highlights

  • Fast-acting response protects circuits quickly
  • 4 A rating at 600 V AC handles standard loads
  • 200 kA interrupt rating at 600 V AC stops severe faults
  • 100 kA interrupt rating at 450 V DC covers DC systems
  • Cylindrical 2-1/4 in × 13/16 in fits CH30J blocks

Specifications

BrandEATON BUSSMANN

Questions about this item

What fuse block series will accept the 13/16 in diameter body of this DFJ-4 fuse?

The cylindrical body fits non-rejection fuse blocks in the CH30J, JM600, JP600, JT600 and JTN600 series.

Will this 600 V AC fast-acting fuse coordinate with existing 450 V DC equipment on the same panel?

Yes, it carries a 100 kA interrupt rating at 450 V DC and 200 kA at 600 V AC, so it protects both voltage levels.

How can I verify the fuse has operated correctly after a fault event?

Because this is a non-indicating model, you must test continuity with a multimeter; an open circuit confirms it has interrupted the fault.

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