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Cylindrical melamine fuse with metal end caps, indicating time-delay type

Bussmann

Bussmann LPJ-I Series 40A Time-Delay Fuse 600VAC/300VDC

SKU CH-RD3Q-5KRJC

A 40 A Class J time-delay fuse rated 600 VAC / 300 VDC with 300 kA AC and 100 kA DC interrupting capacity

  • 40 A time-delay protects motor circuits from nuisance opening
  • 600 V AC and 300 V DC ratings suit industrial power systems
  • 300 kA AC interrupt rating clears heavy faults safely
  • Indicating body gives instant visual confirmation of fuse status
  • Melamine cylindrical body fits standard Class J fuse blocks

Bussmann LPJ-I Series 40A Fuse

This Bussmann LPJ-I Series fuse provides 40 A time-delay protection at 600 V AC and 300 V DC. It suits electrical panels and motor circuits that need Class J over-current protection with visual indication. The melamine body and dual-element design support reliable operation in industrial and commercial installations.

Class J cylindrical fuse fits non-rejection blocks

The 2-3/8 in by 1-1/16 in cylindrical body fits CH60J, JM600, JT600 and JTN600 fuse-block series without a rejection feature. This frees panel space by using standard Class J mounting hardware while the indicating function lets technicians spot a blown element quickly.

300 kA at 600 V AC and 100 kA at 300 V DC

Under sustained fault current the fuse interrupts up to 300 kA on the AC side and 100 kA on the DC side. The time-delay characteristic rides through motor inrush without nuisance opening, then clears persistent overloads before downstream components are damaged.

Highlights

  • 40 A time-delay protects motor circuits from nuisance opening
  • 600 V AC and 300 V DC ratings suit industrial power systems
  • 300 kA AC interrupt rating clears heavy faults safely
  • Indicating body gives instant visual confirmation of fuse status
  • Melamine cylindrical body fits standard Class J fuse blocks

Specifications

BrandBUSSMANN

Questions about this item

How long will the 40 A fuse carry an overload before opening?

The time-delay element tolerates temporary surges such as motor starting currents, then clears sustained overloads to protect conductors and equipment.

What temperature rise or heat dissipation occurs when the fuse runs continuously at 40 A?

The melamine body and cylindrical design dissipate heat within Class J limits during continuous rated-current operation.

Which fuse block series accepts this 2-3/8 in by 1-1/16 in Class J fuse?

Compatible blocks include CH60J, JM600, JT600 and JTN600 series.

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