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

Product Description

The COOPER BUSSMANN LPJ-25SPI is a Class J time delay cartridge fuse rated at 25 amps for general purpose overcurrent protection in industrial and commercial electrical systems. It features a dual-element design that tolerates temporary inrush currents while still providing reliable short-circuit and overload protection. The fuse measures 2.25 inches in overall length and 20.6 mm in diameter, and it includes an indicating feature that provides a visual signal when the fuse has opened. Licensed electricians and maintenance technicians install this fuse in Class J fuse holders wherever high-interrupting-capacity protection is required.

The LPJ-25SPI is suited for residential, commercial, and industrial electrical panels, motor branch circuits, and equipment requiring Class J fuse protection. Its time delay characteristic makes it a practical choice for motor loads and transformer primaries where startup inrush would otherwise cause nuisance openings. The indicating function assists technicians in quickly identifying a blown fuse during troubleshooting without requiring additional test equipment.

Key Features

• Class J time delay fuse with dual-element construction for inrush tolerance
• 25 amp rating with 100 kA interrupting capacity at DC and 300 kA at AC (RMS)
• Indicating design provides visual confirmation of fuse operation
• Overall length of 2.25 inches, overall diameter of 20.6 mm
• Mounts in standard Class J fuse holders
• Meets CE, CSA 22.2 No.248, CSA Class 1422-02 File 53787, UL Listed Guide JDDZ File E4273, and RoHS requirements

Compatibility

Designed for use with Class J fuse holders accepting cartridge fuses with a 20.6 mm diameter and 2.25 inch overall length. Verify holder ratings match the 25 amp and high-interrupting-capacity specifications 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 lock out the circuit before removing or installing the fuse. Confirm the fuse holder is rated for Class J fuses and that the circuit voltage and amperage do not exceed the fuse ratings. Do not substitute a fuse of a different class, higher amperage, or lower interrupting rating.