Bussmann LPJ Series Low-Peak Class J Time-Delay Fuse

Bussmann LPJ Series Low-Peak Class J Time-Delay Fuse

The Bussmann LPJ Series Low-Peak Class J Time-Delay Fuse is engineered to deliver dependable overcurrent protection for demanding industrial, commercial, and institutional electrical systems. Rated 600V with a 300 kiloamp interrupt rating, this fuse family is widely specified by electrical professionals for code-compliant circuit protection and is available in amperage ratings from 3-1/2A through 150A to match a broad range of branch-circuit and equipment protection needs. The time-delay (TD) design allows LPJ Series fuses to ride through the temporary inrush currents typical of motors, transformers, and other inductive loads without nuisance opening, while still responding quickly to sustained overcurrent conditions. Its Class J form factor is sized to install in standard Class J fuse blocks and holders, helping ensure the correct fuse is used in the correct application. Electricians and maintenance teams rely on the Bussmann LPJ Series for consistent, code-compliant performance in panelboards, switchboards, and branch-circuit protection assemblies. Whether used in new installations or as a direct replacement during maintenance, the LPJ Series is manufactured with ferrule end connections to help support safe, reliable circuit protection across the full amperage lineup.

Key Features

• Amperage Range: Available from 3-1/2A up to 150A, allowing the correct rating to be selected for the specific branch circuit or equipment being protected.
• Voltage Rating: Rated 600V, suitable for higher-voltage industrial and commercial power distribution equipment and branch circuits.
• Interrupt Rating: 300 kiloamp interrupt rating provides high fault-current withstand capability for demanding distribution systems.
• Class J Fuse Design: Class J construction (LPJ Low-Peak series) provides a compact, standardized form factor sized specifically for Class J fuse blocks and holders.
• Time-Delay (TD) Operation: Time-delay construction allows the fuse to tolerate momentary current surges from motor starting and transformer inrush without opening unnecessarily.
• Ferrule End Connections: Ferrule-style ends are designed for compatibility with standard Class J fuse blocks and holders across the lineup.
• Low-Peak Series: Part of Bussmann's LPJ Low-Peak Class J fuse family, developed for dependable overcurrent protection in professional electrical applications.
• Standardized Class J Sizing: The Class J footprint is distinct from other fuse classes, helping reduce the risk of installing an incorrect fuse type in a Class J fuse holder.

Technical Specifications

• Amperage Rating Range: 3-1/2A to 150A (select amperage from available options in this family)
• Series: LPJ
• Connection Type: Ferrule
• Class: J
• Interrupt Rating: 300 kiloamps
• End Type: Ferrule
• Product Width: .81 inches
• Product Diameter: .81 inches
• Product Height: 2.25 inches
• Product Weight: .19 pounds

Typical Applications

• Industrial and Commercial Power Distribution Systems
• Motor, HVAC, and Equipment Branch Circuits
• Electrical Panelboards, Switchboards, and Fuse Blocks
• 600V-Rated Overcurrent Protection Assemblies
• Fuse Replacement and Maintenance Programs
• Renovation, Retrofit, and New Construction Electrical Projects

Why Bussmann?

Bussmann is a trusted name in circuit protection, and the LPJ Low-Peak Class J series reflects that reputation with a 600V-rated, time-delay fuse family built for demanding electrical environments. Spanning amperage ratings from 3-1/2A to 150A with a 300 kiloamp interrupt rating, the LPJ Series combines the standardized Class J form factor and ferrule end connections with time-delay performance, giving electrical contractors and facility maintenance teams a dependable component for professional-grade power distribution and overcurrent protection.