Eaton LPJ-400SP Fuse - Class J, 600 Vac 300 kAIC
Part Number: LPJ-400SP
Quick Summary
LPJ-400SP fuse delivers reliable overcurrent protection for heavy motor drives and power feeders in industrial settings. Engineers often wrestle with nuisance tripping during startup and unexpected faults that disrupt production. CE Marked and RoHS compliant, this Class J, time-delay, dual-element device is designed for high-demand environments, featuring a 400 A rating and a 300 kAIC interrupt rating at 600 Vac (and 100 kAIC at 300 Vdc) to safeguard equipment. Its robust construction supports standardized installation with bolted blade ends, simplifying panel upgrades and spare-part strategies. For reliability and compliance, the LPJ-400SP also supports motor-protection strategies that minimize downtime and optimize maintenance planning.
Product Information
Extended Description
LPJ-400SP Eaton: Eaton Bussmann Series Class J fuse, LPJ, time-delay, dual-element current limiting fuse, 400 A, non-idicating fuse, interrupting rating of 300 kA at 600 Vac and 100 kA at 300 Vdc
Product Name
Eaton Bussmann series LPJ fuse
Catalog Number
LPJ-400SP
UPC
051712522847
Product Length/Depth
7.13 in
Product Height
2 in
Product Width
2 in
Product Weight
1.5 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
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
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 design tolerates motor inrush and reduces nuisance tripping, improving line availability for conveyors and fans while protecting downstream components. Application: Heavy-duty motor circuits in packaging lines and process equipment. Feature → Business Impact → Application: 400 A rating with 600 Vac, 300 kAIC interrupt capability delivers high-current protection with fast clearance, reducing fault energy and component damage in power distribution panels. Application: Main feeders and motor control centers requiring robust protection. Feature → Business Impact → Application: Class J construction with bolted blade ends provides secure mounting and compatibility with standard Bussmann/Large-format fuse blocks, streamlining installation and future upgrades. Application: Retrofit projects and new builds in control panels. Feature → Business Impact → Application: Non-indicating fuse minimizes maintenance overhead while delivering critical protection; users receive reliable performance with low maintenance costs. Application: Industrial drives and power distribution where visibility is managed by monitoring systems. Feature → Business Impact → Application: CE Marked and RoHS compliant ensures regulatory alignment across global plants, supporting trade and compliance audits. Application: Manufacturing facilities with strict compliance requirements. Feature → Business Impact → Application: 7.13 in length and 2 in width with 2 in height, plus a 1.5 lb weight, enables easy integration into compact fuse blocks and standardized mounting footprints. Application: Enclosures with limited space and modular panel designs.
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FAQs
The LPJ-400SP uses bolted blade end connections and measures 7.13 in long by 2 in wide with a height of 2 in, matching common Class J fuse blocks. This ensures straightforward retrofit and installation in existing panels without custom housings, reducing installation time and minimizing panel redesign costs.
Key specs include a 400 A amperage rating, voltage ratings of 600 Vac and 300 Vdc, and a 300 kAIC interrupt rating at 600 Vac (100 kAIC at 300 Vdc). It is a time-delay, dual-element current-limiting fuse with a 10-second response at 500% overload, suitable for motor inrush scenarios.
Yes. The time-delay, dual-element design is specifically intended to tolerate inrush and motor startup surges while still delivering fast fault clearance. This minimizes nuisance trips during startup and protects motors, drives, and feeders from severe fault energy.
The LPJ-400SP is CE marked and RoHS compliant, providing regulatory assurance for European installations and adherence to hazardous substance restrictions. While UL listings aren’t specified here, these certifications support international procurement and audit readiness.
Non-indicating design reduces visual indicators that can fail, lowering maintenance checks. The fuse’s high interrupt rating and time-delay behavior translate to fewer nuisance trips and less downtime, delivering tangible savings on production downtime and maintenance costs in continuous-operation environments.