Eaton LGU3320AAW Complete MCCB - UL Listed, 320 A
Part Number: LGU3320AAW
Quick Summary
The Eaton LGU3320AAW is a complete molded case circuit breaker designed for reliable protection in industrial power distribution and control panels. This LG-frame MCCB delivers precise trip coordination with adjustable thermal and magnetic trip units, enabling tailored protection for varied loads and short-circuit scenarios. A common challenge is selecting a device that fits IEC-style control schemes while meeting UL requirements; LGU3320AAW bridges that gap with configurable protection and robust ratings. It carries UL Listed certification and is HACR rated for motor and HVAC applications, supporting safe operation across typical plant environments. With Series G compatibility, a 50/60 Hz supply, and straightforward maintenance benefits, it provides dependable protection with clear long-term cost advantages.
Product Information
Extended Description
LGU3320AAW Eaton: Eaton Series G molded case circuit breaker, LG-frame, LG, Adjustable thermal, adjustable magnetic trip, Three-pole, 320A, 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
LGU3320AAW
UPC
786685241142
Product Length/Depth
4.09 in
Product Height
5.48 in
Product Width
5.48 in
Product Weight
13.5 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
Without terminals
Frame
LG
Frequency rating
50 to 60 Hz
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
MOEM MCCB product selection guide
MOEM MCCB product selection guide
MOEM MCCB product selection guide
Feature LG-frame three-pole design enables compact, robust protection for feeders up to 320 A, reducing panel footprint while maintaining reliable protection. Business Impact This supports higher-current applications in control panels and industrial cabinet layouts, with improved space utilization and easier wiring. Application Suitable for manufacturing lines, process controls, and machine feeders that demand dependable three-pole protection without compromising clearance or accessibility. Feature Adjustable thermal and magnetic trip units allow precise coordination to match load profiles and streamline commissioning. Business Impact Reduces nuisance trips and improves selectivity, lowering downtime and service costs while enabling safer, faster fault isolation. Application Ideal for motors, pumps, conveyors, and HVAC equipment where protective settings must adapt to changing load conditions. Feature High interrupt ratings of 200 kAIC at 240 Vac, 150 kAIC at 480 Vac, and 65 kAIC at 600 Vac provide strong fault withstand. Business Impact This enhances system resilience in high-energy applications and supports compliance with design worst-case fault scenarios. Application Suitable for critical feeders and main distribution panels in heavy industry. Feature 50 to 60 Hz compatibility and 80% rated performance ensure reliable operation across global power networks. Business Impact Enables flexible deployment in multinational facilities without derating margins, improving maintenance planning. Application Tight integration with Series G accessories and compatible lugs simplifies installation and service. Feature Terminals are without terminals, offering flexibility to select appropriate terminal kits or lugs for your panel design. Business Impact Reduces stock complexity and accelerates project timelines by enabling tailored termination options. Application Ideal for panel builders who specify custom termination schemes. Feature Warranty and support references Eaton Selling Policy 25-000 providing a one-year warranty from installation or eighteen months from shipment, whichever occurs first. Business Impact Improves total cost of ownership through predictable coverage and streamlined service planning. Application Useful for procurement teams budgeting long-term maintenance and uptime.
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FAQs
LGU3320AAW is a three-pole LG-frame MCCB designed for panel mounting without terminals. Plan for compatible terminal kits or lugs to meet your panel termination scheme, and confirm space for the 5.48 in width and 5.48 in height. Ensure mounting aligns with Series G accessories and follow UL Listed installation guidelines for safe, compliant panel assemblies.
The unit features adjustable thermal and magnetic trip to tailor protection to load profiles. It is rated at 320 A with 50/60 Hz operation and supports high fault withstands of up to 200 kAIC at 240 Vac, 150 kAIC at 480 Vac, and 65 kAIC at 600 Vac, enabling precise coordination and rapid isolation during faults.
Yes, the LG Series G MCCB is designed with adjustable trip units commonly used in IEC markets and is HACR rated for motor and HVAC applications. While the catalog notes trip units are IEC-oriented, the device is UL Listed and intended for industrial control panels and feeder protection where adjustable coordination enhances reliability.
LGU3320AAW carries UL Listed certification and is HACR rated for general motor and HVAC protection. Warranty terms follow Eaton Selling Policy 25-000: one year from installation or eighteen months from shipment, whichever occurs first, providing coverage for manufacturing defects and early-life reliability concerns.
Key specs include 320 A amperage, three-pole LG frame, adjustable thermal and magnetic trip, 50/60 Hz, and interrupt ratings of 200 kAIC at 240 Vac, 150 kAIC at 480 Vac, and 65 kAIC at 600 Vac. It ships without terminals, requiring compatible termination accessories and integration with Series G MCCB accessories.