Cooper Bussmann LPJ-30SPI Class J Time Delay Fuse 30A

Product Description

The COOPER BUSSMANN LPJ-30SPI is a Class J time delay cartridge fuse rated at 30 amps, designed for general-purpose overcurrent protection in industrial and commercial electrical systems. This dual-element fuse provides time delay characteristics that allow motor inrush and temporary overload currents to pass without nuisance tripping, while still providing fast response to sustained fault conditions. It carries an interrupting rating of 100 kA at DC and 300 kA AC (RMS), making it suitable for high-fault-current environments. The fuse mounts in a standard Class J fuse holder. Licensed electricians and electrical contractors are the primary installers of this component.

This fuse is appropriate for use in motor branch circuits, control panels, and other general-purpose electrical distribution applications where Class J overcurrent protection is specified. Its indicating feature provides visual confirmation of a blown fuse, simplifying troubleshooting during service calls. The cartridge body measures 20.6 mm in diameter and 57.20 mm in length, fitting standard Class J fuse holders used in residential, commercial, and light industrial panelboards and disconnect enclosures.

Key Features

• Class J time delay fuse with dual-element construction for motor circuit protection
• 30-amp rating with 100 kA DC and 300 kA AC (RMS) interrupting capacity
• Indicating design provides visible confirmation of fuse operation
• Cartridge body fits standard Class J fuse holders
• CE Certified, CSA Certified, UL Listed, and RoHS Compliant

Compatibility

Designed for use in standard Class J fuse holders rated for 30-amp cartridge fuses with the dimensions specified above.

Installation Notes

Installation must be performed by a qualified, licensed electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. Always de-energize and lock out the circuit before removing or installing fuses. Use an appropriately rated fuse puller when servicing cartridge fuses in live panel environments. Verify that the replacement fuse class, amperage, and voltage rating match the original circuit design before energizing.