Eaton LPJ-1-1/4SP Fuse - Class J Time-Delay, 300 kAIC
Part Number: LPJ-1-1/4SP
Quick Summary
LPJ fuse provides time-delay, dual-element protection for motors and control circuits in industrial environments. Engineers often battle nuisance tripping and inrush spikes that erode uptime and damage equipment. This Eaton Bussmann LPJ series design delivers robust 300 kAIC interrupt capability at 600 Vac and 100 kAIC at 300 Vdc, while CE marking and RoHS compliance support global deployment. The Class J, time-delay, current-limiting construction combines fast response with controlled fault current, reducing wear on downstream components. By selecting this fuse in panels and motor starters, you gain predictable protection, simpler panel labeling, and improved lifecycle costs. Secondary benefits include compatibility with ferrule-end terminations and standard packaging that streamline installation in existing assemblies.
Product Information
Extended Description
LPJ-1-1/4SP Eaton: Eaton Bussmann Series Class J fuse, LPJ, time-delay, dual-element current limiting fuse, 1.25 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-1-1/4SP
UPC
051712522755
Product Length/Depth
2.25 in
Product Height
0.81 in
Product Width
0.81 in
Product Weight
0.19 lb
Warranty
Not Applicable
Compliances
CE Marked RoHS Compliant
Amperage Rating
1.25 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
Ferrule end x ferrule end
Fuse indicator
Non-indicating
Special features
Indicating, High in-rush current motor protection
Low Voltage Branch Circuit Fuse Chapter
Low Voltage Branch Circuit Fuse Chapter
RoHS Search Tool
Bussmann series Fuseology
Bussmann series LPJ Low-Peak 1-60A data sheet No. 1006
Feature: Time-delay, dual-element design. Business Impact: Reduces nuisance trips during motor start and handles startup inrush without compromising protection. Application: Ideal for motor control panels, drives, and automation enclosures where reliable protection and smooth startups are critical. Feature: High interrupt rating of 300 kAIC at 600 Vac and 100 kAIC at 300 Vdc. Business Impact: Maintains protective integrity during severe faults, minimizing panel damage and enabling faster service. Application: Suitable for electrical protection in feeder circuits, motor starters, and drive systems in manufacturing plants. Feature: Class J with 1.25 A rating and dual-element current-limiting. Business Impact: Delivers selective protection for small control circuits while accommodating motor starting characteristics. Application: Favorable in control panels, low-current feeders, and compact machine controls. Feature: Ferrule-end connections and standard packaging. Business Impact: Enables quick, reliable installation and retrofit, reducing wiring errors and assembly time. Application: Retrofit projects in legacy panels and new installations with standard fuse holders. Feature: RoHS compliant and CE-marked. Business Impact: Supports global regulatory readiness and easier supplier compliance, lowering procurement risk. Application: Global deployments across European and North American facilities.
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FAQs
LPJ-1-1/4SP uses ferrule-end x ferrule-end connections and fits standard fuse holders used in industrial control panels. Its 2.25 in length and 0.81 in width align with common DIN rail and snap-in mounting arrangements, making retrofits and new installs straightforward. The dual-element, time-delay design also supports seamless integration with motor starters and drive panels without requiring specialized hardware.
With a 1.25 A rating and 600 Vac / 300 Vdc voltage ratings, LPJ-1-1/4SP provides current-limiting protection that tolerates startup inrush while rapidly interrupting faults. The high interrupt ratings (300 kAIC at 600 Vac and 100 kAIC at 300 Vdc) protect wiring and upstream devices during faults, reducing the risk of cascading failures in motor control centers and automation panels.
Yes. The LPJ fuse is engineered for motor protection and feeder circuits in industrial settings. Its Class J construction, dual-element design, and high interrupt ratings make it appropriate for drive systems, conveyors, and other motor-driven equipment where reliable protection and controlled inrush response are critical for uptime and equipment longevity.
This fuse is CE marked and RoHS compliant, supporting regulatory compliance across Europe and many global markets. These certifications simplify procurement, reduce compliance risk for panel builds, and enable consistent purchasing across international facilities while meeting environmental and safety requirements.
The time-delay, dual-element design minimizes nuisance trips during motor startup, reducing unplanned downtime. Its robust interrupt capability and durable ferrule connections shorten maintenance cycles, while standard packaging speeds replacements. Over time, this translates to lower total cost of ownership, improved machine availability, and faster payback in automated production lines.