Square D LGM36400U31X 400A 3-Pole 600 V Circuit Breaker

Meet the Square D LGM36400U31X 400A 3-Pole 600 V Circuit Breaker — a rugged, high-capacity solution designed to guard demanding electrical distributions. Built as part of the trusted Square D line, this molded-case breaker delivers dependable overcurrent protection for 3‑phase systems up to 600 V, making it a reliable choice for industrial and commercial installations that demand steady performance and easy maintainability.

• 400 A current rating provides solid protection for large feeders, motors, and heavy-duty equipment without compromising system uptime.
• 3-pole design ensures balanced, simultaneous shutdown across all three phases, minimizing risk from phase imbalances during faults.
• 600 V voltage rating accommodates common industrial distribution needs, allowing safe operation in demanding environments.
• Square D compatibility integrates smoothly with existing Square D panels and the broader LGM family, simplifying replacement and stocking.
• Precise part identification with the exact model number LGM36400U31X makes ordering, maintenance, and future upgrades straightforward and error-free.

This 400A 3-pole 600 V circuit breaker is ideal for data centers, manufacturing floors, large HVAC systems, motor control centers, and service entrances where reliable protection and quick, decisive interruption are essential. Use it to protect main feeders, distribution panels, and critical loads, ensuring that a fault on one phase doesn’t cascade into costly downtime for your operations.

Why choose this specific Square D model? It’s a genuine replacement that aligns with the Square D ecosystem, offering predictable performance, consistent trip characteristics, and straightforward installation in compatible enclosures. The LGM36400U31X part number is your assurance of a correct fit, reducing speculation during procurement and maintenance planning.

Specifications at a glance

• Current rating: 400 A
• Poles: 3
• Voltage rating: 600 V
• Part number: LGM36400U31X
• Type: Molded-case circuit breaker (MCCB)