Eaton LPJ-300SPI Fuse - Class J, 600 Vac
Part Number: LPJ-300SPI
Quick Summary
LPJ-300SPI fuse from Eaton provides time-delay, dual-element protection for motor circuits and power loads up to 600 Vac. In practice, engineers face nuisance trips from motor inrush and the risk of damage when protection is undersized. The device is CE-marked and RoHS compliant, part of the Bussmann Class J family, with a 300 kAIC interrupt rating for robust fault handling. By combining Class J compatibility with dual-element current limiting, it minimizes downtime, simplifies regulatory compliance, and eases installation in control panels and motor starters. This makes the LPJ-300SPI a dependable choice for industrial automation projects seeking durable, maintenance-friendly protection.
Product Information
Extended Description
LPJ-300SPI Eaton: Eaton Bussmann Series Class J fuse, LPJ, time-delay, dual-element current limiting fuse, 300 A, indicating fuse, interrupting rating of 300 kA at 600 Vac
Product Name
Eaton Bussmann series LPJ fuse
Catalog Number
LPJ-300SPI
UPC
051712626439
Product Length/Depth
2 in
Product Height
0.81 in
Product Width
2.5 in
Product Weight
1.5 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Amperage Rating
300 A
Interrupt rating
300 kAIC at 600 Vac 100 kAIC Vdc
Response time
10 sec at 500%
Voltage rating
600 Vac, 300 Vdc
Fuse type
Time delay Current-limiting
Number of elements
Dual
Packaging type
Standard
Class
Class J
Connection
Bolted blade end x bolted blade end
Fuse indicator
Non-indicating With Indicator
Special features
Non-indicating, High in-rush current motor protection
Bussmann series Class J Low-Peak fuse 70-600A data sheet No. 1007
Bussmann Full Line Catalog
Bussmann Full Line Catalog
RoHS Search Tool
Bussmann series Fuseology
Feature: Time-delay, dual-element current-limiting design. Business Impact: Manages motor inrush while limiting fault currents, reducing nuisance trips and equipment wear. Application: Industrial motor protection and power circuits up to 600 Vac. The combination improves uptime and guards wiring from short-circuit events. Feature: Class J fuse with bolted blade end connections. Business Impact: Simplifies mounting and panel integration, ensuring secure, reliable electrical connections. Application: Control panels and motor control centers where Bussmann LPJ devices are standard. Feature: 600 Vac and 300 A rating with 300 kAIC interrupt capability. Business Impact: Provides high fault-current protection for large motors and feeders, enhancing system safety and compliance. Application: Heavy-duty industrial drives and process equipment. Feature: Dual-element construction with high in-rush motor protection. Business Impact: Delivers fast yet selective clearing during startup surges, reducing downtime and arc energy. Application: High in-rush environments such as conveyors and pumps. Feature: Regulatory compliance and physical specs. Business Impact: CE Marked, RoHS compliant, and compact 2 in length with standard 2.5 in width, enabling easy procurement and installation. Application: Global projects requiring standard Class J protection in control cabinets.
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FAQs
The LPJ-300SPI uses bolted blade end x bolted blade end connections, a standard arrangement in Bussmann Class J protection. This design simplifies panel mounting, ensures secure mechanical contact, and supports straightforward replacement in control cabinets and motor starter assemblies without special tooling.
Key ratings include a 300 A amperage rating, 600 Vac voltage rating, and a 300 kAIC interrupt rating at 600 Vac (with a 100 kAIC rating at Vdc, as specified). The fuse is time-delay and current-limiting, optimized for motor protection and high inrush scenarios.
Yes. The LPJ-300SPI is a time-delay, dual-element current-limiting Class J fuse designed to tolerate motor startup surges while providing rapid fault clearing. This makes it well-suited for applications with periodic inrush such as conveyors and pump systems, reducing nuisance trips.
The LPJ-300SPI is CE marked and RoHS compliant, aligning with global regulatory requirements for electrical protection devices. This simplifies procurement for international projects and supports compliance documentation in audits and product registrations.
With a non-indicating (indicator) fuse design option and standard packaging, the LPJ-300SPI supports easy replacement in existing Bussmann Class J assemblies. Its dual-element construction provides durability in demanding environments, while the 2 in length and bolted blade ends reduce installation variability and downtime during service.