Eaton LPJ-350SPI Fuse - Class J Time-Delay, 350 A, 600 Vac 300 kAIC
Part Number: LPJ-350SPI
Quick Summary
The Eaton LPJ-350SPI fuse protects electrical systems by providing time-delay, current-limiting overcurrent protection for motor drives and power distribution panels. Engineers often contend with nuisance trips during motor startups and high inrush events that disrupt production. This device carries RoHS compliant and CE marked certifications and belongs to the Class J family, delivering reliable protection for industrial control gear. Its compact 7.13 inch length and bolted blade end connections enable seamless integration into standard panels, reducing engineering time while boosting system uptime. In industrial automation, it supports electrical protection strategies by combining selectivity with rugged durability for mission-critical load centers.
Product Information
Extended Description
LPJ-350SPI Eaton: Eaton Bussmann Series Class J fuse, LPJ, time-delay, dual-element current limiting fuse, 350 A, indicating fuse, interrupting rating of 300 kA at 600 Vac
Product Name
Eaton Bussmann series LPJ fuse
Catalog Number
LPJ-350SPI
UPC
051712626446
Product Length/Depth
7.13 in
Product Height
2 in
Product Width
2 in
Product Weight
1.55 lb
Warranty
Not Applicable
Compliances
RoHS Compliant CE Marked
Amperage Rating
350 A
Interrupt rating
100 kAIC Vdc 300 kAIC at 600 Vac
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
Low Voltage Branch Circuit Fuse Chapter
Low Voltage Branch Circuit Fuse Chapter
RoHS Search Tool
Bussmann series Fuseology
Time-delay, dual-element current-limiting design reduces nuisance trips during motor startup while still delivering fast fault clearing. This improves equipment uptime and extends motor life in drives, conveyors, and pumps. The solution pairs well with Eaton Bussmann Class J fuses in panel boards and motor control centers. 350 A amperage rating and 600 Vac voltage rating with a 300 kAIC interrupt rating at 600 Vac provide rugged protection for feeders and heavy loads across industrial facilities. This minimizes damage from fault currents and supports safe shutdown practices in manufacturing environments. Robust connection options, bolted blade end x bolted blade end, enable secure mounting and low contact resistance, simplifying installation in standard control panels and reducing field wiring time. Inrush protection features such as high in-rush current motor protection and a defined response time of 10 seconds at 500% help manage startup surges without compromising protection. Compliance and footprint advantages include RoHS and CE marking, a compact 7.13 in length with 2 in width and height, and a weight of 1.55 lb, fitting neatly into space-constrained enclosures while maintaining diagnostic reliability. This combination supports lifecycle cost reductions through fewer replacements and sustained performance in demanding environments.
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FAQs
To install, power down the panel and insert the LPJ-350SPI into the appropriate Class J fuse holder, ensuring alignment with bolted blade ends. Tighten connections to spec and verify correct enclosure clearance. The dual-element design requires proper seating to maintain current-limiting performance and enables straightforward replacement during maintenance without disturbing adjacent devices.
The LPJ-350SPI provides a 350 A amperage rating, 600 Vac voltage rating, and dual-element current-limiting capability. It features an interrupt rating of up to 300 kAIC at 600 Vac and 100 kAIC at dc, with a response time of approximately 10 seconds at 500% overload, suitable for motor drives and power distribution panels.
Yes. The time-delay, dual-element current-limiting design supports motor startup with high inrush current while protecting against sustained faults. This makes the LPJ-350SPI well-suited for motor control centers, drives, and other drive-enabled loads in manufacturing and process environments, providing reliable protection without excessive nuisance trips.
Yes. The LPJ-350SPI is RoHS compliant and CE marked, aligning with European regulatory requirements. It belongs to the Class J fuse family, ensuring consistent electrical protection within compliant electrical protection and circuit control applications across industrial facilities.
The LPJ-350SPI delivers fewer unnecessary outages due to motor startup nuisance trips, improved fault isolation to protect downstream equipment, and a compact form factor that reduces enclosure footprint. These factors contribute to lower maintenance costs, reduced downtime, and a higher return-on-investment for protection strategies in automated production lines.