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Cylindrical 90 A Class J fuse with bolt-on ends and melamine body

Bussmann

Bussmann 90A Class J LPJ-I Time Delay Fuse

SKU CH-PKE1-9N5HV

A 90 A time-delay fuse rated 600 V AC and 300 V DC with indicating feature and 300 kA interrupt rating

  • 90 A time-delay fuse handles motor inrush without nuisance trips
  • 600 V AC / 300 V DC rating suits industrial and renewable-energy circuits
  • 300 kA AC / 100 kA DC interrupt rating clears severe faults safely
  • Indicating body gives instant visual confirmation of blown status
  • Bolt-on Class J design fits standard JM600 blocks for quick installation

Fuse for 90 A circuits

The Bussmann LPJ-I Series fuse provides 90 A time-delay protection for AC and DC power systems. Its Class J rating suits industrial panels and generator supplies where coordinated overload handling is required. The bolt-on body fits non-rejection fuse blocks such as the JM600 series.

Interrupt ratings at 300 V DC and 600 V AC

A 100 kA DC interrupt rating at 300 V and a 300 kA AC interrupt rating at 600 V define the fault-current capability this fuse can safely clear. These two figures are the primary criteria for selecting the device in a given installation.

Indicating dual-element construction

The built-in indicator gives visual confirmation of fuse status after a fault event. Dual-element design separates overload and short-circuit response, reducing nuisance openings while maintaining fast short-circuit interruption. No separate monitoring accessories are needed.

Highlights

  • 90 A time-delay fuse handles motor inrush without nuisance trips
  • 600 V AC / 300 V DC rating suits industrial and renewable-energy circuits
  • 300 kA AC / 100 kA DC interrupt rating clears severe faults safely
  • Indicating body gives instant visual confirmation of blown status
  • Bolt-on Class J design fits standard JM600 blocks for quick installation

Specifications

BrandBUSSMANN

Questions about this item

What does the 90 A rating mean once the fuse is installed in a circuit?

The fuse will carry up to 90 A continuously and only open on sustained overloads, while its time-delay element tolerates brief inrush currents such as motor starting without nuisance tripping.

How does the Class J designation and the 600 V AC / 300 V DC voltage rating limit where this fuse can be used?

Class J defines the physical envelope and rejection features, so the fuse fits only Class J blocks rated for 600 V AC or 300 V DC maximum; it cannot be used in higher-voltage or differently keyed holders.

What physical dimensions and mounting style are required for this fuse to fit?

The bolt-on body measures 4-5/8 in long by 1-1/8 in diameter and mounts directly into compatible Class J fuse blocks such as the JM600 series.

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