Cooper Bussmann LPJ-80SP Class J Time Delay Fuse 80A

Product Description

The COOPER BUSSMANN LPJ-80SP is a Class J time delay cartridge fuse rated at 80 amps. It is a dual-element, bolt-on fuse designed for general-purpose overcurrent protection in industrial and commercial electrical systems. The LPJ-80SP delivers an interrupting rating of 300 kA at AC (RMS) and 100 kA at DC, making it suitable for high-fault-current environments. At 4-5/8 inches in overall length and 28.60 mm in diameter, it fits standard Class J fuse holders and disconnects. Licensed electricians and industrial maintenance technicians are the primary installers of this fuse type.

The LPJ-80SP is used in motor branch circuits, feeder circuits, and control panel applications where time delay characteristics are required to ride through inrush currents without nuisance tripping. Its Class J form factor is common in commercial HVAC equipment, industrial machinery, and distribution panels that demand a compact, high-interrupting-capacity fuse. The bolt-on mount style suits applications where the fuse is secured directly to bus or terminal hardware rather than a clip-style holder.

Key Features

• 80-amp time delay rating handles motor inrush without nuisance tripping
• 300 kA interrupting rating at AC (RMS) for high-fault-current protection
• 100 kA interrupting rating at DC
• Dual-element construction separates overload and short-circuit response
• Bolt-on mount type for secure installation on bus or terminal hardware
• Non-indicating design — no visual blown indicator
• RoHS compliant and UL Listed (Guide JDDZ, File E4273)

Compatibility

Designed as a Class J replacement fuse for use in standard Class J fuse holders and disconnect switches rated for bolt-on cartridge fuses at 80 amps.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC). De-energize and lock out the circuit before removing or installing any fuse. Verify the fuse holder or disconnect is rated for Class J bolt-on cartridge fuses and confirm the ampere rating matches the circuit requirements before energizing. Do not substitute a fuse of a different class or higher ampere rating to restore service.