Cooper Bussmann LPJ-2-1/2SP Class J Fuse 2.5A

Product Description

The COOPER BUSSMANN LPJ-2-1/2SP is a Class J time delay cartridge fuse rated at 2.5 amps, designed for general-purpose overcurrent protection in electrical distribution and control systems. With an interrupting rating of 100 kA at DC and 300 kA at AC (RMS), this fuse delivers high fault-current capacity in a compact cartridge body. It measures 2.25 inches in overall length and 20.60 mm in diameter, fitting standard Class J fuse holders. The time delay characteristic allows the fuse to tolerate brief inrush currents while still responding quickly to sustained overloads and short circuits. Licensed electricians and industrial maintenance technicians are the primary installers.

This fuse is suited for residential, commercial, and light industrial electrical panels, motor control centers, and disconnect switches where Class J fuse holders are installed. The general-purpose rating makes it appropriate for branch circuit protection, control transformer protection, and equipment panels requiring a compact, high-interrupting-rated fuse. It is a non-indicating type, so visual confirmation of a blown fuse requires a continuity check or dedicated fuse tester rather than an integral flag indicator.

Key Features

• 2.5 amp rating with time delay action to tolerate motor inrush and transformer magnetizing currents
• High interrupting rating: 100 kA at DC and 300 kA at AC (RMS)
• Class J form factor fits standard Class J fuse holders and disconnects
• Dual-element construction (2 elements) for accurate time delay response
• Non-indicating body keeps installation profile low in tight panel spaces
• UL Listed, CSA Certified, CE Certified, and RoHS Compliant

Compatibility

Designed for use in Class J fuse holders and fusible disconnect switches rated for Class J fuses. Consult the fuse holder manufacturer specifications to confirm dimensional and interrupting-rating compatibility before installation.

Installation Notes

Installation must be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and all applicable local codes. De-energize and lockout/tagout the circuit before removing or inserting any fuse. Confirm the fuse holder is rated for Class J fuses and that the holder contact clips are clean and undamaged before seating the fuse. Never substitute a fuse of a different class, higher amperage, or lower interrupting rating than what the circuit requires.