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Cylindrical 45 A Class J fuse with melamine body and indicator window

Bussmann

Bussmann LPJ-I 45A Class J Time-Delay Fuse

SKU CH-1KSA-523ZY

45 A Class J time-delay fuse with indicating body rated 600 V AC and 300 V DC for high-interrupt protection

  • TypeFuses
  • 45 A time-delay fuse handles motor inrush without nuisance trips
  • 600 V AC rating suits industrial three-phase power systems
  • 100 kA interrupting capacity at 300 V DC clears severe faults safely
  • Indicating body gives instant visual confirmation of blown status
  • Dual-element melamine construction resists heat and vibration in harsh environments

Product identity

This Bussmann LPJ-I 45A Class J time-delay fuse is a cylindrical indicating fuse rated for 45 A at 600 V AC and 300 V DC. It suits industrial control panels, motor circuits and generator installations that require Class J protection with visual indication.

Sustained-load behaviour

The dual-element design provides time-delay characteristics that tolerate motor inrush and transformer magnetising currents without nuisance opening. An interrupt rating of 300 kA at 600 V AC and 100 kA at 300 V DC ensures safe interruption under heavy fault conditions.

Compatibility checks

Verify that the existing fuse block accepts Class J non-rejection style bodies and matches the 2-3/8 in length by 1-1/16 in diameter. Confirm the circuit voltage does not exceed 600 V AC or 300 V DC and that the available fault current stays within the published interrupt ratings.

Highlights

  • 45 A time-delay fuse handles motor inrush without nuisance trips
  • 600 V AC rating suits industrial three-phase power systems
  • 100 kA interrupting capacity at 300 V DC clears severe faults safely
  • Indicating body gives instant visual confirmation of blown status
  • Dual-element melamine construction resists heat and vibration in harsh environments

Specifications

TypeFuses
BrandBUSSMANN

Questions about this item

Does the LPJ-I 45A fuse generate noticeable heat or noise during continuous daily operation?

The fuse operates silently and produces only normal resistive heat under its 45 A rating; no fan or audible components are present.

What fuse block must I already own for this Class J fuse to fit and function?

It requires a non-rejection Class J block such as the CH60J, JM600, JT600 or JTN600 series to accept the cylindrical 2-3/8 in body.

Can this indicating time-delay fuse replace an older non-indicating Class J fuse in the same circuit?

Yes, it fits the same Class J dimensions and 600 V AC / 300 V DC ratings, adding a visual open-fuse indicator while keeping the same time-delay response.

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