Eaton LGU4320AAG Complete MCCB - 320 A UL Listed
Part Number: LGU4320AAG
Quick Summary
The Eaton LGU4320AAG is a complete molded case circuit breaker used to protect industrial power distribution panels by interrupting fault currents. Operators often struggle with coordinating thermal and magnetic trips across four-pole configurations, leading to nuisance trips and downtime. UL Listed and HACR rated, with 50/60 Hz compatibility for IEC markets, help ensure safe, regulation-compliant protection in global installations. Selecting Series G MCCBs standardizes protection characteristics, reduces spare parts, and speeds panel commissioning. With a 320 A rating and metric mounting hardware, this device supports reliable protection while simplifying installation and maintenance.
Product Information
Extended Description
LGU4320AAG Eaton: Eaton Series G molded case circuit breaker, LG-frame, LG, Adjustable thermal, adjustable magnetic trip, Four-pole, 320A, 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
LGU4320AAG
UPC
786685184982
Product Length/Depth
4.09 in
Product Height
7.22 in
Product Width
7.22 in
Product Weight
15.7 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
Catalog Notes
Adjustable thermal, adjustable magnetic trip units are typically used in IEC markets and are not UL or CSA listed, LG breaker is HACR rated
Type
Complete breaker
Amperage Rating
320 A
Trip Type
Adjustable thermal, adjustable magnetic
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
200 kAIC at 240 Vac 65 kAIC at 600 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: LG frame, four-pole complete breaker with line and load terminals and metric mounting hardware. Business Impact: simplifies panel design and reduces wiring time, enabling faster commissioning. Application: ideal for control panels and motor circuits in IEC markets. Feature: Adjustable thermal and magnetic trip units. Business Impact: precise coordination, reduces nuisance trips, and improves machine uptime. Application: adaptable to varying motor loads and control sequences in multi-cabinet systems. Feature: High interrupt ratings—200 kAIC at 240 VAC, 150 kAIC at 480 VAC, 65 kAIC at 600 VAC. Business Impact: enhances fault current handling and safety compliance in demanding environments. Application: suits heavy motor loads and short-circuit events in manufacturing lines. Feature: 80% rated and HACR rated capabilities. Business Impact: supports safe continuous operation under typical industrial loads while complying with building protection standards. Application: ideal for IEC-driven control panels and motor control centers. Feature: Series G, line-and-load terminals, metric mounting. Business Impact: standardized protection characteristics across fleets, reducing maintenance complexity. Application: easy integration into existing Eaton protection schemes and modular panel designs.
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FAQs
The LGU4320AAG uses a four-pole LG frame with line and load terminals and metric mounting hardware, designed for straightforward panel integration. Ensure correct alignment with the panel busbar arrangement, secure mounting per metric standards, and verify that the device fits within the available space while maintaining proper clearances for safe operation.
The adjustable thermal and magnetic trip units allow precise setting of overload and short-circuit protection to match motor load profiles and startup characteristics. This reduces nuisance trips, improves coordination between devices, and supports optimized protection schemes across multi-pole configurations in industrial panels.
Yes. The LGU4320AAG is designed for IEC-market compatibility with adjustable trip features while carrying UL Listed certification for reliable protection in global installations. Always confirm the specific product listing to ensure the variant meets local regulatory requirements and application needs.
This MCCB is UL Listed and HACR rated, aligning with common electrical protection standards and motor control practices. These certifications support safe operation in regulated facilities, facilitate panel approvals, and help meet safety and performance expectations for industrial environments.
ROI benefits arise from standardized protection across panels, reduced downtime due to fewer nuisance trips, and streamlined maintenance with a single part family. The 320 A rating and robust interrupt capabilities also help avoid costly fault events, while easy compatibility with existing Series G components lowers total ownership costs.