Eaton E2LEM3400WU66 Mining MCCB - UL Listed, 1000Y/577 Vac
Part Number: E2LEM3400WU66
Quick Summary
The Eaton E2LEM3400WU66 mining complete molded case circuit breaker protects underground mining equipment and power distribution. In tough mining environments, nuisance trips, downtime, and challenging servicing disrupt production and raise maintenance costs. It carries UL Listed, IEC Rated, and CSA Certified approvals for global safety and reliability. With a 400 A rating and 1000Y/577 Vac, it integrates with standard mining MCCB panels, delivering safer, compliant electrical protection and reduced downtime. Its L-frame, three-pole design and 120 Vac undervoltage release option offer compatibility with existing switchgear while simplifying future upgrades and service procedures. This combination supports mining safety standards and reduces total cost of ownership through durable design and proactive protection.
Product Information
Extended Description
E2LEM3400WU66 Eaton: Eaton E2 mining complete molded case circuit breaker, L-frame, E2LEM, Electr. LI trip, 500-2500A, Three-pole, 400A, 1000Y/577 Vac, 250 Vdc
Product Name
Eaton E2 mining complete molded case circuit breaker
Catalog Number
E2LEM3400WU66
UPC
782114345924
Product Length/Depth
4.06 in
Product Height
10.75 in
Product Width
8.25 in
Product Weight
20 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Certifications
UL Listed IEC Rated CSA Certified
Type
E2 mining
Amperage Rating
400 A
Voltage rating
1000Y/577 Vac, 250 Vdc
Trip Type
T165
Circuit breaker type
E2LEM
Circuit breaker frame type
Complete breaker
Magnetic trip range
500-2500A
Terminals
Without terminals
Undervoltage release
120 Vac rear with left pigtail
Frame
L
Class
Mining
Interrupt rating
25 kAIC at 600 Vac 65 kAIC at 240 Vac 35 kAIC at 480 Vac 10 kAIC at 1000Y/577 Vac 22 kAIC at 250 Vdc
Number of poles
Three-pole
Trip rating
500-2500 A
Eaton E2 Series mining service circuit breakers
Eaton E2 Series mining service circuit breakers
Eaton E2 Series mining service circuit breakers
Eaton E2 Series mining service circuit breakers
Circuit Protection, Molded Case Circuit Breakers, Volume 4, Tab 2
MSHA policy letter for suitability, safety and performance of circuit breakers
Robinson Mine Case Study: Solutions for the mining industry
E2 1200 Vac - K, L, and M-Frame mining service breakers and accessories
E2 1200 Vac - K, L, and M-Frame mining service breakers and accessories
E2 1200 Vac - K, L, and M-Frame mining service breakers and accessories
E2 1200 Vac - K, L, and M-Frame mining service breakers and accessories
Understanding circuit breaker design and operation to improve safety and reliability in underground mining
Feature: T165 trip type with precise thermal-magnetic protection and a magnetic range of 500-2500 A. Business Impact: reduces nuisance trips and motor wear, improving line reliability and uptime. Application: ideal for high‑demand underground feeders and conveyors where selective protection is essential. Feature: L-frame, three-pole complete breaker with 400 A rating and voltage capability up to 1000Y/577 Vac and 250 Vdc. Business Impact: enables robust fault handling across multi‑voltage mining installations and simplifies procurement. Application: mine subpanels and large switchgear assemblies needing wide voltage compatibility. Feature: Undervoltage release at 120 Vac rear with left pigtail. Business Impact: ensures safe lockdown on control power loss, preventing unintended re-energization. Application: motor control centers and critical mining control panels. Feature: Compact dimensions (4.06 in deep, 8.25 in wide, 10.75 in high) and weight of 20 lb. Business Impact: eases retrofit and new-install planning in crowded enclosures. Application: upgrading legacy mining MCCBs without extensive enclosure modifications. Feature: Certifications UL Listed, IEC Rated, CSA Certified. Business Impact: streamlines compliance and project approvals, reducing bid risk. Application: procurement and commissioning across global mining projects. Feature: Accessories compatibility and catalog alignment with E2 mining service breakers. Business Impact: lowers installation time and avoids mis-match errors. Application: field retrofits and new builds in rugged mining environments.
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FAQs
The E2LEM3400WU66 is an L-frame, three-pole mining MCCB designed for compatibility with standard mining service breakers and accessories. It supports 400 A operation, 1000Y/577 Vac and 250 Vdc ratings, and features an undervoltage release option. It is intended for integration into existing mining switchgear enclosures and can retrofit with Eaton E2 mining accessories to simplify upgrades and maintain fast protection coordination in underground plants.
The T165 trip type combines thermal and magnetic elements to deliver fast, selective fault interruption, protecting motors and feeders without unnecessary shutdowns. This is crucial in mining where nuisance trips idle expensive equipment. By coordinating with the 500-2500 A magnetic range, the device isolates faults quickly while preserving downstream equipment and production lines from damage.
Yes. With a 400 A rating, 1000Y/577 Vac, and 250 Vdc capability, the breaker handles high fault currents typical of mining feeders and control circuits. Its rugged L-frame design and certified safety approvals (UL Listed, IEC Rated, CSA Certified) are tailored for underground environments, delivering reliable protection, safer maintenance, and improved uptime in harsh conditions.
The device carries UL Listed, IEC Rated, and CSA Certified approvals. These certifications indicate compliance with widely recognized safety and performance standards, enabling easier acceptance in global mining projects, reducing regulatory risk, and supporting installation approvals, supplier qualification, and warranty coverage across diverse sites.
The E2LEM3400WU66 offers durable, maintenance-friendly protection with a robust interrupt rating and reliable thermal-magnetic trip. Its compact 20 lb form factor simplifies retrofits, reducing installation time and enclosure modifications. Combined with Eaton service tooling and documented service centers, it lowers lifecycle costs by minimizing unplanned outages, extending equipment life, and supporting faster maintenance cycles.