Eaton LGH3320AAG Complete molded case circuit breaker - UL Listed HACR Rated
Part Number: LGH3320AAG
Quick Summary
Eaton LGH3320AAG complete molded case circuit breaker protects power distribution panels in industrial automation and plant electrical rooms. This design helps engineers avoid nuisance trips by offering adjustable thermal and magnetic trip settings to match load profiles. It is UL Listed and HACR rated with 50/60 Hz compatibility, supporting IEC markets and panel-integrator requirements. The LG frame and metric mounting provide a compact, space-efficient protection solution, delivering reliable performance across diverse industrial applications while aligning with cost- and safety-conscious project goals.
Product Information
Extended Description
LGH3320AAG Eaton: Eaton Series G molded case circuit breaker, LG-frame, LG, Adjustable thermal, adjustable magnetic trip, Three-pole, 320A, 100 kAIC at 240 Vac, 65 kAIC at 480 Vac, 35 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
LGH3320AAG
UPC
782116120604
Product Length/Depth
4.09 in
Product Height
5.48 in
Product Width
5.48 in
Product Weight
16 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
65 kAIC at 480 Vac 35 kAIC at 600 Vac 100 kAIC at 240 Vac
Number of poles
Three-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: Adjustable thermal and magnetic trip units enable precise protection tailored to motor and feeder loads. Business Impact: Reduces nuisance tripping and equipment wear, improving uptime and maintenance planning. Application: Ideal for motor control centers and feeders in manufacturing environments. Feature: High interrupt ratings (100 kAIC at 240 VAC, 65 kAIC at 480 VAC, 35 kAIC at 600 VAC) increase protection against short circuits. Business Impact: Limits fault energy transfer, safeguarding downstream equipment and reducing downtime. Application: Heavy-duty power distribution panels and switchgear in plants. Feature: Three-pole LG frame with line and load terminals and metric mounting hardware simplifies installation. Business Impact: Faster commissioning, safer wiring, and consistent field assembly. Application: New builds and panel upgrades in IEC-aligned facilities. Feature: 320 A rating with 80% rated operation supports continuous loading and efficient panel sizing. Business Impact: Optimizes conductor sizing and energy usage while maintaining protection integrity. Application: Feeder and distribution circuits in automation lines. Feature: UL Listed and HACR rated with 50/60 Hz compatibility provide essential compliance and motor-load suitability. Business Impact: Streamlines procurement and regulatory acceptance, reducing project risk. Application: Industrial equipment protection in global facilities.
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FAQs
The LGH3320AAG is designed for protection in industrial power distribution panels, including motor control centers and switchgear. With a 320 A rating and adjustable thermal and magnetic trip, it supports precise protection coordination for three-phase loads, reducing nuisance trips and improving equipment uptime in manufacturing, process, and automation environments.
The adjustable thermal and magnetic trip units allow you to tailor the breaker’s response to load characteristics. The thermal element handles long-term overcurrent, while the magnetic element provides instantaneous protection for short-circuit events. Properly set, they minimize nuisance trips for motor startups and feeder circuits, boosting reliability and reducing maintenance costs.
LGH3320AAG has a 320 A continuous rating with interrupt ratings of 100 kAIC at 240 VAC, 65 kAIC at 480 VAC, and 35 kAIC at 600 VAC. This wide range supports protection across various distribution voltages and loads, providing robust short-circuit protection for panel boards and motor circuits in industrial plants.
Yes. The LGH3320AAG is designed with metric mounting hardware and LG frame geometry suitable for IEC-style installations. While catalog notes reference IEC market usage for adjustable trip units, the unit is also UL Listed and HACR rated, offering cross-market applicability while meeting local safety requirements.
The LGH3320AAG carries Eaton’s standard warranty policy (25-000) with one year from installation or eighteen months from shipment, whichever comes first. Regular inspections, torque checks on terminations, and trip unit calibration verification are recommended to ensure ongoing protection and performance in demanding environments.