Eaton LESRK40 Edison fuse - UL Listed Class RK1
Part Number: LESRK40
Quick Summary
The Eaton Edison LESRK fuse protects high in-rush motor circuits in industrial drives. Engineers often contend with nuisance tripping and equipment damage during motor start-up, and LESRK40 helps mitigate those risks with robust surge handling. UL Listed and CSA Certified, the fuse also leverages Class RK1 construction for reliable, code-compliant protection in North American installations. With a 40 A, 600 V rating and a 200 kAIC interrupt capacity, it supports scalable motor protection while simplifying procurement and spare-part strategies. This solution fits well with standard motor-control practices and complements the broader Eaton Edison protection family, delivering consistent performance across drives, pumps, and conveyors.
Product Information
Extended Description
LESRK40 Eaton: Eaton Edison LESRK fuse, Non-indicating, High in-rush current motor protection, 40 A, Class RK1, 200 kAIC, Standard, 600 V
Product Name
Eaton Edison LESRK fuse
Catalog Number
LESRK40
UPC
782634548386
Product Length/Depth
5.5 in
Product Height
1.06 in
Product Width
1.06 in
Product Weight
1.6 lb
Warranty
No warranty
Compliances
Not Applicable
Certifications
UL Listed CSA Certified
Amperage Rating
40 A
Interrupt rating
200 kAIC
Voltage rating
600 V
Packaging type
Standard
Class
Class RK1
Fuse indicator
Non-indicating
Special features
Non-indicating, High in-rush current motor protection
Non-indicating design reduces panel clutter and spare parts inventory, trimming maintenance costs across the fuse’s life cycle. With no indicator light to fail or confuse, technicians experience faster diagnostics and simpler wiring in MCCs and motor control panels. In typical drives, this straightforward form supports clean layouts, faster replacements, and predictable electrical protection for conveyors, pumps, and fans. High in-rush current protection addresses motor start-up transients. The LESRK40 provides robust surge handling without compromising normal operation, reducing nuisance trips and unplanned downtime. Applications include fans, pumps, and conveyors that routinely see heavy inrush, and the 40 A, 600 V rating with 200 kAIC interrupt capacity ensures reliable fault clearance in harsh industrial environments. Class RK1 compatibility simplifies design and procurement, enabling straightforward integration with Eaton Edison line fuses and standard fuse blocks. This reduces engineering time, minimizes risk of mis-sizing, and supports NEC and UL compliance across industrial installations. Certifications like UL Listed and CSA Certified provide regulatory assurance for North American projects, while the 600 V rating covers most general motor circuits. The compact 5.5 in length, 1.06 in width and 1.06 in height form-factor and 1.6 lb weight make it a convenient replacement in crowded MCCs. Operational advantages include standardized cataloging (LESRK40, UPC 782634548386) that streamline ordering and reduce downtime during maintenance and part swaps.
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FAQs
LESRK40 is a 40 A, 600 V Class RK1 fuse with a 200 kAIC interrupt rating and non-indicating design. When selecting it, ensure compatible fuse blocks and panel spaces, verify mounting clearances for the 5.5 in length and 1.06 in width, and confirm North American compliance via UL Listed and CSA Certified status. Use correct catalog LESRK40 for spare parts and maintain consistent stocking levels to minimize downtime during replacements.
LESRK40 is designed for high in-rush motor protection, balancing fast fault interruption with tolerance for startup surges. Its RK1 construction and 200 kAIC interrupt rating allow normal startup currents to pass without unnecessary trips, while faults are cleared promptly. This results in greater machine uptime for drives, conveyors, and pumps and reduces service calls related to tripping during start-up.
Yes. LESRK40 is rated 600 V and is UL Listed and CSA Certified, which aligns with North American electrical codes and standards for motor protection in MCCs and similar installations. The Class RK1 fuse type is widely accepted in general motor-protection schemes, enabling straightforward integration with standard Eaton Edison protection products and existing panel hardware.
LESRK40 carries UL Listed and CSA Certified markings, providing regulatory assurance for compliant installations in North America. The 40 A, 600 V rating and 200 kAIC interrupt capacity meet typical motor-protection requirements, while Class RK1 compatibility supports widespread wiring practices. These certifications help simplify procurement, reduce audit risk, and support NEC/UL compliance during design and installation.
The LESRK40 reduces downtime by minimizing nuisance trips during motor start-up and simplifying spare-parts inventories through a single, standard catalog part. Its compact form and compatibility with Eaton Edison line streamline panel design and replacement workflows, lowering engineering effort and maintenance labor. Over time, this translates to improved uptime, more predictable maintenance budgets, and faster mean time to repair (MTTR).