Eaton LG3450S03 MCCB - UL 489 / CSA / IEC 947-2
Part Number: LG3450S03
Quick Summary
Eaton LG3450S03 MCCB provides reliable short-circuit protection for industrial switchgear and power distribution panels. Engineers often contend with nuisance trips and challenging wiring layouts in complex systems; this unit reduces trips through precise timing and adaptable terminations. UL 489, CSA C22.2 No. 5, and IEC 947-2 certifications anchor safety, compliance, and cross-border interoperability. Built around Series C and an L-frame design, it supports three poles, a left-side shunt trip, and line-load terminals, delivering straightforward installation and dependable protection for critical assets while streamlining maintenance and test cycles.
Product Information
Extended Description
LG3450S03 Eaton: Eaton Series C complete molded case circuit breaker, L-frame, Fixed thermal, fixed magnetic trip, Three-pole, 450A, 600 Vac, Line and load, Engine generator, 12-24 Vac/dc opposite side w/ left pigtail, Reverse feed, TA450LD, TA450LD
Product Name
Eaton Series C complete molded case circuit breaker
Catalog Number
LG3450S03
UPC
782113491738
Product Length/Depth
5.48 in
Product Height
5.48 in
Product Width
5.48 in
Product Weight
16 lb
Certifications
UL 489 CSA Std. C22.2 No. 5 IEC 947-2
Amperage Rating
450 A
Voltage rating
600 Vac
Trip Type
T186
Circuit breaker frame type
Complete breaker
Series
Series C
Shunt trip
12-24 Vac/dc left pigtail opposite
Terminals
Line and load
Frame
L
Class
Engine generator
Line
TA450LD
Prod load
TA450LD
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
Power metering and monitoring with Modbus RTU product aid
Power metering and monitoring with Modbus RTU product aid
Power metering and monitoring with Modbus RTU product aid
Power metering and monitoring with Modbus RTU product aid
Power metering and monitoring with Modbus RTU product aid
Power metering and monitoring with Modbus RTU product aid
Power metering and monitoring with Modbus RTU product aid
Breaker service centers
Circuit Protection, Molded Case Circuit Breakers, Volume 4, Tab 2
Circuit Breakers Explained
Circuit Breakers Explained
MOEM MCCB product selection guide
MOEM MCCB product selection guide
MOEM MCCB product selection guide
MOEM MCCB product selection guide
MOEM MCCB product selection guide
Feature: 450 A amperage rating with a 600 Vac maximum. The business impact is reduced panel complexity, lower fault current interruptions, and fewer devices needed to protect a single circuit. This is ideal for motor feeders and high-power distribution in industrial automation setups. Feature: Fixed thermal and fixed magnetic trip (T186) for fast, predictable isolation under overload or short-circuit conditions, reducing equipment damage and downtime. This supports safer startup sequences and smoother maintenance windows in demanding manufacturing environments. Feature: Shunt trip option (12-24 Vac/dc left pigtail) and line-load terminals enable remote or automatic tripping while simplifying wiring and field retrofit projects. Application flexibility improves protection coordination with generators and backup power. Feature: Series C, L-frame design with a three-pole configuration ensures standardized replacement parts and consistent performance across panels, improving maintenance planning and vendor support. Feature: TA450LD line/load compatibility and reverse-feed capability support engine generator integration, enabling safe, compliant operation in standby power systems and critical facilities.
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FAQs
LG3450S03 is a three-pole, Series C molded case breaker designed for line-and-load terminations. Its L-frame, TA450LD compatibility, and left-side shunt trip enable seamless replacement in common industrial panels and switchgear. This compatibility simplifies retrofits, minimizes wiring edits, and maintains consistent protection across existing equipment while supporting engine-generator interface needs.
The LG3450S03 is rated for 450 A and 600 Vac with a fixed thermal and fixed magnetic trip configured as T186. This combination provides rapid isolation under overload and short-circuit conditions, helping prevent equipment damage. The three-pole design supports balanced fault clearing in multi-phase circuits common to motor feeders.
Yes. The LG3450S03 is designed for engine generator applications and supports reverse feed scenarios. With a shunt trip option (12-24 Vac/dc left pigtail) and line-load terminals, it can be integrated into standby power and generator interlock configurations, ensuring safe automatic or remote shutoff when fault conditions occur.
LG3450S03 carries UL 489, CSA C22.2 No. 5, and IEC 947-2 certifications. These standards guarantee safe operation, electrical interoperability across North America and international markets, and compliance with stringent protection requirements for molded case circuit breakers in diverse industrial settings.
Consider installing LG3450S03 in panels with line-load terminations and left-side shunt trip for remote control. Its three-pole L-frame design, Series C compatibility, and TA450LD references simplify part stocking and field replacements. This reduces downtime, lowers maintenance complexity, and improves uptime for mission-critical equipment and standby power systems.