Cooper Bussmann LPJ-35SP Class J Time Delay Fuse 35A

Product Description

The COOPER BUSSMANN LPJ-35SP is a Class J time delay cartridge fuse rated at 35 amps, designed for general-purpose overcurrent protection in industrial and commercial electrical systems. It features a two-element construction that tolerates normal inrush currents while responding quickly to sustained overloads and short-circuit faults. The fuse carries an interrupting rating of 100 kA at DC and 300 kA AC (RMS), making it suitable for high-available-fault-current installations. At 2.375 inches in length and 27 millimeters in diameter, it mounts in standard Class J fuse holders. Licensed electricians and industrial maintenance technicians are the primary installers.

This fuse is suited for commercial and light industrial applications where Class J current-limiting performance is required. Typical uses include motor branch circuits, feeder protection, and control panel fusing where time delay characteristics are needed to ride through motor starting inrush without nuisance tripping. The cartridge body type fits standard Class J fuse holders found in panelboards, disconnect switches, and combination starters. It is non-indicating, so visual inspection or a fuse tester is required to confirm continuity after a fault event.

Key Features

• Class J time delay, two-element construction tolerates motor inrush currents
• 35-amp rating for branch circuit and feeder overcurrent protection
• High interrupting capacity: 100 kA at DC, 300 kA AC (RMS)
• Cartridge body, 2.375 inches long by 27 millimeters in diameter, fits standard Class J holders
• Non-indicating design — requires tester or visual check to confirm fuse condition
• CE, CSA, UL Listed (Guide JDDZ File E4273), and RoHS compliant

Compatibility

Designed as an OEM-style replacement for Class J fuse holder applications requiring a 35-amp time delay cartridge fuse conforming to CSA 22.2 No. 248 and UL Listed Guide JDDZ standards.

Installation Notes

Installation must be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and any applicable local codes. De-energize and lockout/tagout the circuit before removing or installing the fuse. Verify the fuse holder is rated for Class J cartridge fuses and that the holder contact clips are clean and undamaged before seating the fuse. Do not substitute a fuse of a different class, higher amperage, or without equivalent interrupting rating in the same holder.