Eaton 3BR4242L400F Main Lug Loadcenter - UL Listed
Part Number: 3BR4242L400F
Quick Summary
The Eaton BR main lug loadcenter is a 400 A distribution enclosure designed for three-phase service in commercial spaces. Engineers often confront tight spaces, surge-protection needs, and strict safety standards, so a reliable, easy-to-wire solution saves time and costs. This unit carries UL 67 and UL Listed certifications and is built with a NEMA 1 enclosure and flush mounting for rugged, install-ready performance. With 42 circuits and factory integrated surge protection, it supports scalable electrical infrastructure while reducing external components; ideal for data centers, manufacturing lines, and upgraded facilities. In addition, the 10-year warranty and aluminum bus design deliver long-term reliability and improved total cost of ownership for industrial operations.
Product Information
Extended Description
3BR4242L400F Eaton: Eaton BR main lug loadcenter,Main lug,400 A,Aluminum,NEMA 1,Flush,NEMA 1,42 Circuits,42 Spaces,Factory integrated surge, No feed thru lugs,Three-phase
Product Name
Eaton BR main lug loadcenter
Catalog Number
3BR4242L400F
UPC
786685895345
Product Length/Depth
38 in
Product Height
11.25 in
Product Width
21 in
Product Weight
89 lb
Warranty
10 year limited
Certifications
UL 67 UL Listed file E52977
Type
Main lug
Amperage Rating
400 A
Bus material
Aluminum
Mounting
Flush
Number of circuits
42
Number of spaces
42
Options
Factory integrated surge, No feed thru lugs
Phase
Three-phase
Enclosure
NEMA 1
NEMA rating
NEMA 1
Residential and Light Commercial, Load centers and Circuit Breakers, Volume 1 Tab 1
Eaton Specification Sheet - 3BR4242L400F
Eaton type BR circuit breaker limited warranty June 2024
Feature: 400 A main lug capacity with 42 circuits and 42 spaces in a flush-mounted enclosure. Business Impact: Delivers robust three-phase distribution in a compact footprint, enabling tighter panel layouts and easier future expansions. Application: Data centers, manufacturing lines, and spaces with evolving electrical loads. Feature: Aluminum bus for improved conductivity and lighter weight. Business Impact: Reduces voltage drop and supports easier handling during installation and maintenance. Application: Industrial distribution panels where reliability and ease of service are critical. Feature: Factory integrated surge protection and no feed-thru lugs. Business Impact: Lowers BOM, minimizes wiring complexity, and enhances protection for sensitive loads. Application: Environments with sensitive electronics and high transient activity. Feature: UL 67 and UL Listed certifications with NEMA 1 enclosure. Business Impact: Ensures regulatory compliance and safe indoor operation, reducing risk during audits. Application: Compliance-driven facilities and spaces requiring certified enclosures. Feature: BR-series compatibility and flush mounting. Business Impact: Streamlines retrofits and new installations with familiar hardware and straightforward wiring. Application: Facilities upgrading or expanding BR power distribution. Feature: 10-year limited warranty. Business Impact: Improves total cost of ownership and maintenance planning by reducing long-term risk. Application: Long-term reliability expectations for critical infrastructure.
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FAQs
The 3BR4242L400F excels in indoor electrical rooms and service entrances that require reliable three-phase distribution. With 400 A capacity, 42 circuits, and a NEMA 1 flush-mount enclosure, it is ideal for data centers, manufacturing lines, and upgraded facilities where panel footprint, wiring simplicity, and long-term reliability matter most.
It uses a robust 400 A main lug configuration with an aluminum bus designed to minimize voltage drop and heat. The 42-space/42-circuit layout supports scalable three-phase distribution, enabling straightforward expansion and simplified fault isolation, which translates to improved uptime for critical machinery.
Yes. The unit is part of the BR family and designed for BR-type breakers with flush mounting to fit tightly in standard electrical rooms. Its 38 in length, 21 in width, and 11.25 in height align with common panel footprints, enabling easy retrofits and minimal modification during installation.
The loadcenter carries UL 67 and UL Listed certifications and is installed in a NEMA 1 enclosure. These standards validate safe indoor operation, reliability for industrial environments, and compliance with recognized safety requirements in electrical distribution.
Factory integrated surge protection reduces the need for additional external devices, lowers wiring complexity, and quickens commissioning. Coupled with a 10-year warranty, the solution minimizes maintenance events and downtime, delivering lower total cost of ownership and faster return on investment for facilities relying on continuous power availability.