Eaton Bussmann LPJ-400SP Low-Peak Fuse, 400A 600V AC, Class J Dual-Element Time-Delay - Pack of 3

Low-Peak™ LPJ Series Class J Dual-Element Time-Delay Fuse - Eaton Bussmann Series

The Eaton Bussmann LPJ-400SP is a premium industrial-grade Class J fuse designed for high-performance circuit protection. As a cornerstone of the Low-Peak™ family, this dual-element, current-limiting fuse provides a minimum 10-second time-delay at 500% of the rated current. This allows the system to accommodate harmless transient surges and motor intensive starting currents, significantly reducing downtime and service costs associated with nuisance tripping.

The LPJ-400SP is engineered with a massive 300kA interrupting rating at 600Vac, offering the highest level of safety for industrial power systems. Its advanced current-limiting performance restricts the magnitude of short-circuit currents, protecting downstream components from the damaging thermal and magnetic effects of faults. Its space-saving Class J design is ideal for modern, compact equipment where panel space is at a premium.

Technical Specifications:

• Manufacturer: Eaton
• Brand: Bussmann series
• Catalog Number: LPJ-400SP
• Fuse Class: Class J
• Amperage Rating: 400 A
• Voltage Rating: 600 Vac, 300 Vdc
• Interrupting Rating: 300kA Vac RMS Sym., 100kA Vdc
• Time-Delay: 10 seconds (minimum) at 500% of rated current
• Standard Compliance: UL Listed Class J, CSA Certified, CE, RoHS Compliant

Key Performance Advantages:

• Enhanced Component Protection: High-speed response to major faults reduces let-through energy to safeguard electrical distribution gear.
• Efficient Operation: Dual-element architecture ensures lower internal resistance, resulting in cooler operation and lower energy consumption in the panel.
• Selective Coordination: Simplifies system design with a consistent 2:1 ampacity ratio required for efficient selective coordination.
• Versatile Design: Offers Type 2 "No Damage" protection for NEMA and IEC motor controllers when sized appropriately.

Application: The LPJ-400SP is widely utilized in industrial motor control centers, branch circuit protection, and service entrance equipment. It is particularly effective for heavy-duty industrial machinery, HVAC systems, and power distribution infrastructures requiring reliable, high-capacity protection.