Cooper Bussmann LPJ-15SP Class J Time Delay Fuse 15A

Product Description

The COOPER BUSSMANN LPJ-15SP is a Class J time delay cartridge fuse rated at 15 amps, designed for general-purpose overcurrent protection in demanding electrical applications. It features a dual-element construction that tolerates temporary inrush currents without nuisance tripping while still providing fast response to sustained fault conditions. The fuse body measures 2.25 inches in length and 20.6 millimeters in diameter, fitting standard Class J fuse holders. At 0.1 pounds, it is a compact, non-indicating device. Licensed electricians and facilities maintenance professionals install this fuse in motor branch circuits, HVAC disconnect boxes, and industrial control panels.

This fuse suits residential and light commercial electrical systems where Class J fusing is specified for branch circuit or feeder protection. It is appropriate for use in motor starters, control transformers, and similar inductive load applications where the time delay characteristic helps prevent unnecessary shutdowns during normal equipment startup. The Class J form factor provides a higher interrupting rating than standard Class H or K fuses, making it suitable for higher fault-current environments.

Key Features

• 15 amp rating with time delay dual-element construction for motor and inductive load circuits
• 100 kA interrupting rating at DC and 300 kA at AC (RMS) for high fault-current environments
• Class J cartridge body, 2.25 inches long and 20.6 millimeters in diameter, mounts in standard Class J fuse holders
• Non-indicating design with two elements for reliable overcurrent response
• UL Listed (Guide JDDZ, File E4273), CSA 22.2 No. 248 Certified, CE Certified, and RoHS Compliant

Compatibility

Designed for use in standard Class J fuse holders rated for 15-amp, 600-volt service. Compatible with panel-mount and inline fuse holders accepting the Class J cartridge form factor.

Installation Notes

Installation must be performed by a licensed electrician in accordance with NEC Article 240 and applicable local codes. Always de-energize and lock out the circuit before removing or installing fuses. Verify the fuse holder is rated for Class J fuses and that the ampere rating matches the circuit design. Do not substitute a higher-ampere fuse to solve nuisance tripping — investigate the root cause first.