Eaton LGU3400FAG Molded Case Breaker - UL Listed & IEC Rated
Part Number: LGU3400FAG
Quick Summary
The Eaton LGU3400FAG molded case circuit breaker protects power distribution panels in industrial environments. It delivers reliable overcurrent protection with a fixed thermal trip and adjustable magnetic trip, designed to minimize nuisance trips and improve protection coordination across feeders. Users often struggle with inconsistent performance when panels span multiple voltages or when breakers trip due to short-term surges; this model addresses that with precise T185 trip characteristics and robust Series G LG-frame construction. UL Listed, CSA Certified, and IEC Rated certifications ensure compliance for critical equipment and global deployments, while CE marking supports international projects. Designed for efficiency, it pairs with metric mounting hardware and a compact LG frame to reduce installation time and lifecycle costs.
Product Information
Extended Description
LGU3400FAG Eaton: Eaton Series G molded case circuit breaker, LG-frame, LG, Fixed thermal, adjustable magnetic trip, Three-pole, 400A, 200 kAIC at 240 Vac, 150 kAIC at 480 Vac, 65 kAIC at 600 Vac, Line and load, Metric, 50/60 Hz, 80% rated
Product Name
Eaton Series G complete molded case circuit breaker
Catalog Number
LGU3400FAG
UPC
786685185057
Product Length/Depth
4.09 in
Product Height
5.48 in
Product Width
5.48 in
Product Weight
11.9 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 CSA Certified IEC Rated
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
Line and load
Frame
LG
Frequency rating
50 to 60 Hz
Mounting hardware
Metric
Interrupt rating
150 kAIC at 480 Vac 65 kAIC at 600 Vac 200 kAIC at 240 Vac
Number of poles
Three-pole
Application of Tap Rules to Molded Case Breaker Terminals
Application of Tap Rules to Molded Case Breaker Terminals
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
NG and ND-Frame molded case circuit breakers
NG and ND-Frame molded case circuit breakers
NG and ND-Frame molded case circuit breakers
The LGU3400FAG is a Series G complete molded case breaker with LG-frame construction and fixed thermal trip complemented by adjustable magnetic trip (T185). This combination provides precise overcurrent protection for up to 400 A circuits, reducing nuisance trips and improving coordination in shared feeders. The high interrupt ratings—200 kAIC at 240 VAC, 150 kAIC at 480 VAC, and 65 kAIC at 600 VAC—enable reliable fault interruption in demanding industrial environments, which translates to less downtime and safer maintenance windows. Installation and compatibility are streamlined by metric mounting hardware, line-and-load terminals, and a three-pole design that fits standard panels without custom adapters. Certifications and reliability are reinforced by UL Listed, CSA Certified, IEC Rated, and CE Marked status, supporting global deployment and regulatory compliance. Industry insights show a trending shift toward Series G MCCBs for compact protection with easy accessory integration, further reducing total cost of ownership for control panels.
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FAQs
Yes. The LGU3400FAG uses the LG frame and metric mounting hardware designed for Series G molded case breakers, aligning with standard 3-pole configurations and line-and-load terminals. This streamlines panel substitutions, minimizes retrofit time, and ensures consistent protective coordination across existing installations.
The device is rated for 400 A with a fixed thermal and adjustable magnetic trip (T185). It provides interrupt ratings of 200 kAIC at 240 VAC, 150 kAIC at 480 VAC, and 65 kAIC at 600 VAC, operates at 50/60 Hz, and is 80% rated. These specs support reliable protection in motor loads and distribution panels while enabling selective coordination.
LGU3400FAG excels in power distribution panels, motor control centers, and process automation applications where compact protection with high interrupt ratings and robust trip engineering is required. Its Series G LG-frame design and HACR-rated catalog notes support safe operation in commercial, industrial, and heavy manufacturing environments.
LGU3400FAG is UL Listed, CSA Certified, IEC Rated, and CE Marked, ensuring compliance across North American and international markets. HACR-rated catalog notes further indicate suitability for motor control protection, while CE marking supports deployment in EU and other markets.
The product carries Eaton’s warranty policy 25-000 (one year from installation or 18 months from shipment, whichever occurs first). Access to Breaker Service Centers and a broad ecosystem of accessories helps maintain uptime, simplify replacements, and optimize lifecycle costs through predictable maintenance and availability of replacement parts.