Eaton Bussmann LPJ-450SP Low-Peak Fuse, 450A 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-450SP is a high-performance, current-limiting Class J fuse engineered for superior circuit protection in industrial electrical systems. As part of the prestigious Low-Peak™ series, this dual-element fuse offers a minimum 10-second time-delay at 500% of the rated current. This allows the fuse to withstand high inrush currents and temporary overloads from motors and transformers, effectively eliminating nuisance tripping while ensuring robust protection during actual fault conditions.

With a 300kA interrupting rating at 600Vac, the LPJ-450SP provides the highest level of short-circuit protection available. Its current-limiting design significantly reduces the peak let-through current and destructive thermal energy (I²t), safeguarding downstream equipment such as switchgear, motor starters, and power panels. The compact Class J footprint allows for significant space savings in enclosure design compared to Class R or Class K alternatives.

Technical Specifications:

• Manufacturer: Eaton
• Brand: Bussmann series
• Catalog Number: LPJ-450SP
• Fuse Class: Class J
• Amperage Rating: 450 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
• Certifications: UL Listed (JDDZ.E4273), CSA Certified (22.2 No. 248.8), CE, RoHS Compliant

Key Features:

• Energy Efficient: Dual-element construction results in lower internal resistance, reducing heat dissipation and operating costs.
• Simplified Coordination: Maintains a consistent 2:1 ampacity ratio for all Low-Peak fuses, making selective coordination easy and reliable.
• Reliability: Long time-delay minimizes downtime caused by transient surges and motor starting currents.
• Enhanced Safety: Provides Type 2 "No Damage" protection for NEMA and IEC motor controllers when properly sized.

Application: The LPJ-450SP is the industry standard for protecting branch circuits, feeder circuits, and motor control centers. It is widely utilized in heavy industrial machinery, HVAC systems, and power distribution infrastructures where high fault current capacity and space efficiency are critical requirements.