Eaton Bussmann LPJ-300SP Low-Peak Fuse, 300A 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-300SP is a high-performance, current-limiting Class J fuse designed for exceptional circuit protection in industrial and commercial applications. As a premier component of the Low-Peak™ series, this dual-element fuse provides a minimum 10-second time-delay at 500% of the rated current. This thermal characteristic is essential for handling high inrush currents from motors and transformers, virtually eliminating nuisance fuse openings while providing high-speed response to short-circuit conditions.

With a massive 300kA interrupting rating at 600Vac and 100kA at 300Vdc, the LPJ-300SP offers industry-leading fault current protection. Its advanced design significantly restricts let-through energy to protect downstream components from mechanical and thermal damage. The compact Class J physical dimensions allow for a smaller footprint in panel designs compared to other Class R or Class K solutions, supporting more efficient equipment configurations.

Technical Specifications:

• Manufacturer: Eaton
• Brand: Bussmann series
• Catalog Number: LPJ-300SP
• Fuse Class: Class J
• Amperage Rating: 300 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
• Standards: UL Listed (Class J), CSA Certified, CE, RoHS Compliant

Key Features:

• Superior Current Limitation: Reduces peak let-through current and I²t levels to protect sensitive electrical distribution gear.
• Energy Efficient: Optimized dual-element construction minimizes internal resistance, leading to cooler operation and reduced energy loss.
• Selective Coordination: Maintains an easy-to-calculate 2:1 ampacity ratio for simplified selective coordination with other Low-Peak fuses.
• Component Protection: Ideal for achieving Type 2 "No Damage" protection for NEMA and IEC motor controllers.

Application: The LPJ-300SP is specifically engineered for branch circuit protection, motor control centers, and feeder circuits. It is widely applied in heavy industrial environments, mission-critical power distribution systems, and HVAC machinery where high-reliability protection and space-saving designs are necessary.