Eaton LGU4400FAW Complete MCB - UL Listed, 400 A
Part Number: LGU4400FAW
Quick Summary
The Eaton LGU4400FAW is a complete molded case circuit breaker designed for panel protection in industrial electrical systems. Engineers often struggle with nuisance trips and complex coordination, but this model combines fixed thermal trip with adjustable magnetic trip to optimize selectivity and uptime. It carries UL Listed, IEC rated, and CSA certified marks, with CE marking for global compliance and HACR-rated suitability for motor protection. Designed for Series G LG-frame panels, it supports 50/60 Hz operation and 400 A ratings while delivering reliable protection with compact form. The combination of robust protection, clear documentation, and straightforward installation translates into lower lifecycle costs and easier procurement for panel builders and maintenance teams.
Product Information
Extended Description
LGU4400FAW Eaton: Eaton Series G molded case circuit breaker, LG-frame, LG, Fixed thermal, adjustable magnetic trip, Four-pole, 400A, 200 kAIC at 240 Vac, 150 kAIC at 480 Vac, 65 kAIC at 600 Vac, Without terminals, 50/60 Hz, 80% rated
Product Name
Eaton Series G complete molded case circuit breaker
Catalog Number
LGU4400FAW
UPC
786685241326
Product Length/Depth
4.09 in
Product Height
7.22 in
Product Width
7.22 in
Product Weight
17.6 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.
Compliances
CE Marked
Certifications
UL Listed IEC Rated CSA Certified
Catalog Notes
LG breaker is HACR rated
Type
Complete breaker
Amperage Rating
400 A
Trip Type
T185
Circuit breaker type
LG
Circuit breaker frame type
Complete breaker
Rating
80% rated
Series
Series G
Terminals
Without terminals
Frame
LG
Frequency rating
50 to 60 Hz
Interrupt rating
65 kAIC at 600 Vac 200 kAIC at 240 Vac 150 kAIC at 480 Vac
Number of poles
Four-pole
Application of Multi-Wire Terminals for Molded Case Circuit Breakers
Application of Multi-Wire Terminals for Molded Case Circuit Breakers
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
High performance operating handles for Series G circuit breakers product aid
Breaker service centers
Circuit Protection, Molded Case Circuit Breakers, Volume 4, Tab 2
MOEM MCCB product selection guide
MOEM MCCB product selection guide
MOEM MCCB product selection guide
Feature: 400 A amperage rating with a four-pole LG frame. Business Impact: Enables robust protection for main feeders in large panels, improving uptime and fault tolerance in industrial distribution. Application: Ideal for motor control centers and equipment rooms where high-current protection is required. Feature: LG series G complete breaker design with a compact LG frame. Business Impact: Simplifies retrofits and new installations by ensuring compatibility with existing Series G MCCBs and available accessories. Application: Helps maintainers achieve fast, reliable replacements in control panels and switchgear. Feature: Fixed thermal trip with adjustable magnetic trip (T185). Business Impact: Delivers precise overload protection and selectable magnetic trip, reducing nuisance trips and enabling coordinated protection schemes. Application: Suitable for motors and process loads in 50/60 Hz environments. Feature: High interrupt ratings (65 kAIC at 600 V, 200 kAIC at 240 V, 150 kAIC at 480 V). Business Impact: Withstands high fault currents, protecting feeders and downstream equipment while meeting code requirements. Application: Main feeders in industrial facilities, data centers, and manufacturing lines. Feature: Compliance and certifications (UL Listed, IEC Rated, CSA Certified, CE Marked) with HACR rating. Business Impact: Ensures regulatory compliance across North America and international projects, simplifying project approvals and supplier qualification. Application: Suitable for global panel builds and harmonized protection schemes. Feature: 50/60 Hz, 80% rated, four-pole design. Business Impact: Supports common industrial power systems with efficient operation and reliable performance under partial-load conditions. Application: Industrial power distribution, machine controls, and panel assembly where consistent performance is required.
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FAQs
LGU4400FAW is a four-pole, 400 A molded case circuit breaker designed for Series G LG-frame panels. It is supplied without terminals, so plan to use compatible bus bars or add-on lug assemblies. Ensure mounting aligns with standard Series G footprints, verify bus connection clearances, and follow Eaton torque recommendations during terminal connections to ensure reliable operation and optimal heat dissipation.
Key specs include a 400 A amperage rating, four poles, and interrupt ratings of 65 kAIC at 600 V, 200 kAIC at 240 V, and 150 kAIC at 480 V. The trip type is T185 with fixed thermal and adjustable magnetic trip, operating at 50/60 Hz, and it is 80% rated for standard panel loading. These features support reliable protection and selective coordination in demanding environments.
Yes. The LGU4400FAW is HACR-rated and designed for motor protection alongside general 50/60 Hz panel protection. Its Series G LG-frame compatibility, four-pole construction, and adjustable magnetic trip help achieve selective coordination in motor control centers, reducing nuisance trips while safeguarding motors and feeders in industrial processes.
LGU4400FAW carries UL Listed, IEC Rated, and CSA Certified marks, plus CE Marked compliance. HACR rating adds motor-protection suitability. These certifications enable broader regulatory acceptance and easier approval in North American and international projects, supporting documentation and procurement workflows.
Eaton warranty policy 25-000 offers one year from the date of installation or eighteen months from shipment, whichever occurs first. For service, rely on Eaton-authorized parts and technicians, with access to the product literature, replacement parts, and authorized service centers to minimize downtime and extend protection system life.