Eaton Bussmann LPJ-350SP Low-Peak Fuse, 350A 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-350SP is a professional-grade Class J current-limiting fuse, engineered to provide high-level circuit protection for industrial and commercial power systems. As a member of the Low-Peak™ series, it features a dual-element construction that provides a minimum of 10 seconds of time-delay at 500% of the rated current. This design effectively suppresses nuisance fuse openings caused by temporary motor starting surges and transformer inrush currents, ensuring continuous uptime in critical operations.

Boasting a 300kA interrupting rating at 600Vac, the LPJ-350SP is designed to handle extreme fault conditions safely. Its current-limiting capabilities significantly reduce the peak let-through current and thermal energy (I²t) during a fault, providing optimum protection for sensitive downstream equipment such as NEMA and IEC motor starters. The compact Class J footprint allows for a smaller physical profile compared to Class R or Class K fuses, facilitating more efficient panel layouts.

Technical Specifications:

• Manufacturer: Eaton
• Brand: Bussmann series
• Catalog Number: LPJ-350SP
• Fuse Class: Class J
• Amperage Rating: 350 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
• Compliance: UL Listed (Class J), CSA Certified, CE, RoHS Compliant

Key Features:

• Superior Protection: Provides Type 2 "No Damage" protection for motor controllers, reducing repair costs and downtime.
• Energy Efficient: The dual-element design operates at a lower temperature than traditional fuses, reducing power dissipation within enclosures.
• Simplified Selective Coordination: Features a consistent 2:1 ampacity ratio with other Low-Peak fuses, simplifying system design and safety analysis.
• Universal Application: Excellent for both branch circuit and feeder protection in various power distribution environments.

Application: The LPJ-350SP is ideal for branch circuit protection, service entrance equipment, and motor control centers. It is widely specified for the protection of heavy-duty industrial machinery, large HVAC units, and power distribution systems where space-saving and high-interrupting capacity are required.