Cooper Bussmann LPJ-17-1/2SP Class J Time Delay Fuse 17.5A

Product Description

The COOPER BUSSMANN LPJ-17-1/2SP is a Class J time delay cartridge fuse rated at 17.5 amps, designed for general-purpose overcurrent protection in demanding electrical applications. With an interrupting rating of 100 kA at DC and 300 kA at AC (RMS), this fuse provides robust fault-current protection in circuits where high available fault current is a concern. The cartridge body measures 20.6 mm in diameter and 2.25 inches in overall length. It mounts in a standard fuse holder and features a two-element time delay design that tolerates brief motor inrush currents without nuisance opening. Licensed electricians and industrial maintenance technicians are the primary installers.

This fuse is suited for residential, commercial, and light industrial electrical panels, motor branch circuits, and equipment requiring Class J fuse protection. The time delay characteristic makes it appropriate for motor loads, transformers, and other inductive equipment where startup surge currents would otherwise trip a fast-acting fuse. It is sold individually but must be ordered in multiples of 3 per manufacturer minimum order requirements.

Key Features

• Class J fuse rating with 300 kA AC (RMS) interrupting capacity for high fault-current environments
• Time delay design tolerates motor inrush and transformer magnetizing currents
• Two-element construction for accurate overload and short-circuit response
• Non-indicating body keeps installation straightforward in standard Class J fuse holders
• RoHS compliant and CE certified for broad application suitability
• UL Listed and CSA certified to recognized North American and international standards

Compatibility

Designed for use in standard Class J fuse holders. Consult fuse holder manufacturer specifications to confirm current rating and body dimension compatibility before installation.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. Always de-energize and lockout/tagout the circuit before removing or installing fuses. Verify the fuse holder is rated for Class J fuses and is compatible with the 17.5-amp rating. Do not substitute a higher-rated fuse to resolve nuisance opening — diagnose the underlying load or fault condition first.