Eaton LG3500A12S03 Molded Case Circuit Breaker - Series C

Part Number: LG3500A12S03
LG3500A12S03
Manufacturer
Eaton
Part number
LG3500A12S03
Category

Quick Summary

Eaton LG3500A12S03 molded case circuit breaker protects electrical distribution panels by delivering precise overcurrent protection in demanding environments. This unit is designed for up to 500 A and 600 Vac, with an L-frame, Three-pole configuration that supports engine-generator applications. A common challenge is achieving reliable tripping without nuisance outages; LG3500A12S03 addresses this with fixed thermal and fixed magnetic trip for fast, predictable response. The product’s UL-listed documentation and Series C design help simplify compliance workflows and spare parts planning. For engineers and procurement teams, that translates into reduced downtime, simplified stocking, and safer remote operation through built-in shunt trip and auxiliary switch features. Available accessories and service documentation enhance lifecycle management.

Product Information

Extended Description

LG3500A12S03 Eaton: Eaton Series C complete molded case circuit breaker, L-frame, Fixed thermal, fixed magnetic trip, Three-pole, 500A, 600 Vac, Engine generator, 2A-2B same side w/ right pigtail, 12-24 Vac/dc opposite side w/ left pigtail, Reverse feed
Product Name
Eaton Series C complete molded case circuit breaker
Catalog Number
LG3500A12S03
UPC
786685913261
Product Length/Depth
5.48 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.
Compliances
Contact Manufacturer
Amperage Rating
500 A
Voltage rating
600 Vac
Trip Type
T186
Circuit breaker frame type
Complete breaker
Auxiliary switch
2A-2B same side with right pigtail
Series
Series C
Shunt trip
12-24 Vac/dc left pigtail opposite
Frame
L
Class
Engine generator
Number of poles
Three-pole
Functions
Reverse
UL listed 100%-rated molded case circuit breakers UL listed 100%-rated molded case circuit breakers UL listed 100%-rated molded case circuit breakers Motor protection circuit breakers product aid Motor protection circuit breakers product aid Motor protection circuit breakers product aid Motor protection circuit breakers product aid Motor protection circuit breakers product aid Motor protection circuit breakers product aid Motor protection circuit breakers product aid Breaker service centers Circuit Protection, Molded Case Circuit Breakers, Volume 4, Tab 2 Circuit breakers explained Circuit breakers explained Eaton Specification Sheet - LG3500A12S03 Eaton Specification Sheet - LG3500A12S03 Eaton Specification Sheet - LG3500A12S03 Eaton Specification Sheet - LG3500A12S03 Eaton Specification Sheet - LG3500A12S03 Selling Policy 25-000 - Distribution and Control Products and Services
Feature: 500 A amperage rating with a 600 Vac rating in an L-frame, three-pole design. Business Impact: Delivers robust protection for medium-to-heavy load applications, reducing fault-related downtime. Application: Ideal for panel boards and motor-start environments in industrial facilities. Feature: Fixed thermal and fixed magnetic trip. Business Impact: Provides predictable, fast isolation during overloads and short circuits, improving safety and equipment longevity. Application: Critical in motors, pumps, and process equipment where stable coordination matters. Feature: Shunt trip 12-24 Vac/dc on the left with a right-side 2A-2B auxiliary switch. Business Impact: Enables remote interlock and centralized control for safer start-up/shutdown sequences. Application: Control rooms and safety interlocks in packaged power systems. Feature: Reverse feed capability. Business Impact: Supports generator back-up configurations and safe power transfer scenarios. Application: Engine-generator backed facilities and critical load pathways. Feature: Series C, engine-generator class and compatibility with standard Eaton accessories. Business Impact: Streamlines installation, spare parts provisioning, and serviceability, lowering lifecycle costs. Application: Medium- to large-distribution panels requiring reliable MCCB protection with expansion options.

Get a Quick Quote for a Eaton LG3500A12S03

Chat with us on WhatsApp - fast responses guaranteed

Need to speak with someone? We'll call you back within 2 hours during business hours

Interested in Eaton LG3500A12S03? Enquire Now

FAQs

Yes. LG3500A12S03 uses the Series C/MCCB form factor with an L-frame footprint (5.48 in depth/height/width) and three-pole configuration. It supports standard Eaton accessories, including right-side 2A-2B auxiliary switch, left-side shunt trip (12-24 Vac/dc), and compatible terminals, simplifying retrofit or new panel installations while minimizing the need for custom adapters.
LG3500A12S03 is a 500 A, 600 Vac three-pole MCCB with a fixed thermal and fixed magnetic trip, designed for predictable fault isolation. The trip type is specified as T186 in its product specs, and time-current performance is supported by Eaton’s series C documentation and current curves. For exact coordination against motor loads, reference the Eaton time-current curves in the LG3500A12S03 datasheets.
Yes. The LG3500A12S03 is explicitly described as Engine Generator class with a three-pole frame and reverse feed capability. It includes a shunt trip (12-24 Vac/dc on the left) and generous current and voltage ratings (500 A, 600 Vac), making it suitable for generator-backed power systems where safe remote operation and reliable fault isolation are essential.
LG3500A12S03 aligns with UL-listed MCCB standards, with Eaton providing UL-listed documentation for 100%-rated molded case breakers in this series. Compliance details and installation guidance are available in Eaton’s specification sheets and application notes, though for formal regulatory confirmation contacting Eaton or reviewing the linked datasheets is recommended.
Maintenance benefits arise from robust Series C design, UL-listed reliability, and modular accessories (shunt trip, auxiliary switch) that simplify diagnostics and remote control. The 16 lb unit fits standard panel budgets and reduces downtime, while Eaton’s warranty policy and service centers support long-term investment protection, lowering lifecycle costs and improving ROI through safer, continuous operation.