Cooper Bussmann LPJ-25SP Time Delay Fuse 25A Class J

Product Description

The COOPER BUSSMANN LPJ-25SP is a Class J time delay cartridge fuse rated at 25 amps, designed for general-purpose overcurrent protection in commercial and industrial electrical systems. It delivers a 100 kA interrupting rating at DC and 300 kA at AC (RMS), making it suitable for high-fault-current environments. The cartridge body measures 2.25 inches in length and 20.6 mm in diameter, fitting standard Class J fuse holders. With a two-element construction, it tolerates brief inrush currents without nuisance opening while still reacting quickly to sustained overloads. Licensed electricians and industrial maintenance technicians are the primary installers.

This fuse is appropriate for residential, commercial, and light industrial branch circuit and feeder protection where Class J fusing is specified. It mounts in a standard fuse holder and is well suited for motor loads, HVAC equipment, and control panels where time delay characteristics are required to ride through startup inrush currents without sacrificing fault protection. The non-indicating body provides no visual blown indication, so a fuse tester or multimeter should be used during troubleshooting.

Key Features

• 25-amp time delay rating handles motor inrush without nuisance opening
• 300 kA interrupting rating at AC (RMS) for high-fault-current installations
• 100 kA interrupting rating at DC
• Two-element construction provides both overload and short-circuit protection
• Class J form factor fits standard Class J fuse holders
• CE Certified, CSA Certified, UL Listed, and RoHS Compliant

Compatibility

Designed for use in Class J fuse holders. Suitable for general-purpose overcurrent protection in branch circuits and feeder applications where a Class J time delay fuse is specified.

Installation Notes

Installation should be performed by a licensed electrician in accordance with NEC requirements for the applicable circuit and equipment rating. Always de-energize and lockout/tagout the circuit before replacing or inspecting fuses. Verify that the fuse holder is rated for Class J fuses and that the replacement fuse amperage matches the circuit design. Because this is a non-indicating fuse, use a calibrated multimeter or fuse tester to confirm continuity before reinstalling.