Eaton LPJ-400SPI Fuse - Class J Time-Delay 300 kAIC
Part Number: LPJ-400SPI
Quick Summary
Eaton LPJ-400SPI fuse protects industrial circuits with time-delay Class J protection for motors and power panels. It helps prevent nuisance tripping caused by motor inrush and start-up surges, reducing unplanned downtime. Key approvals include RoHS compliant and CE marked products with Class J classification, ensuring reliable integration in global electrical assemblies. Designed for secure bolted blade end connections, this fuse supports easy field replacement and predictable maintenance, while offering compatibility with Bussmann series accessories for streamlined panel design and procurement.
Product Information
Extended Description
LPJ-400SPI Eaton: Eaton Bussmann Series Class J fuse, LPJ, time-delay, dual-element current limiting fuse, 400 A, indicating fuse, interrupting rating of 300 kA at 600 Vac
Product Name
Eaton Bussmann series LPJ fuse
Catalog Number
LPJ-400SPI
UPC
051712626453
Product Length/Depth
2 in
Product Height
7.13 in
Product Width
0.81 in
Product Weight
1.5 lb
Warranty
Not Applicable
Compliances
RoHS Compliant CE Marked
Amperage Rating
400 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
Low Voltage Branch Circuit Fuse Chapter
Low Voltage Branch Circuit Fuse Chapter
RoHS Search Tool
Bussmann series Fuseology
Feature → Business Impact → Application: Time-delay, dual-element current-limiting design reduces nuisance trips during motor inrush, enabling smoother startup sequences and higher equipment uptime in conveyors, pumps, and presses. This translates to lower maintenance costs and fewer production stoppages in continuous-process environments. Feature → Business Impact → Application: 400 A rating with 600 Vac and 300 kAIC interrupt capability provides robust feeder protection against short circuits, minimizing damage to transformers, switchgear, and downstream loads in industrial plants. Feature → Business Impact → Application: Bolted blade end connections deliver secure, quick installation in control panels and switchgear, simplifying retrofits and spare-part planning for OEMs and integrators. Feature → Business Impact → Application: RoHS compliant and CE marked compliance streamlines procurement for global deployments, ensuring conformity across international projects and reducing sourcing risk. Feature → Business Impact → Application: Non-indicating with optional indicator supports straightforward fault visualization in crowded panels, aiding faster diagnostics and reduced downtime during maintenance windows.
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FAQs
The LPJ-400SPI uses bolted blade end x bolted blade end connections and is designed for Class J protective schemes in industrial power distribution. It fits standard control panels and switchgear assemblies that accept dual-element, time-delay fuses rated at 600 Vac and 400 A, enabling straightforward retrofits and panel upgrades.
With time-delay capability and dual-element current-limiting construction, the LPJ-400SPI accommodates motor inrush while limiting fault current. Its 10-second response at 500% helps avoid nuisance trips during startup, improving productivity for motors and drives while protecting downstream equipment from short-circuit damage.
Yes. The 400 A rating, 600 Vac operation, and 300 kAIC interrupt rating provide robust protection for high-current motor feeders. Its time-delay, current-limiting design minimizes nuisance tripping during startups, supporting smoother operation of pumps, fans, and conveyors in continuous-operation environments.
The LPJ-400SPI is RoHS compliant and CE marked, aligning with EU and global regulatory expectations. It is classified as Class J and is designed for safe, reliable operation in industrial electrical protection and control applications.
Compared with non-time-delay fuses, the LPJ-400SPI reduces unplanned downtime by mitigating nuisance trips during motor startups, lowers maintenance frequency, and extends equipment life by delivering precise fault interruption. These factors translate into lower total cost of ownership and improved equipment availability in production lines.