Square D LGL36400U31X - 400A, 3-Pole, Circuit Breaker

Introducing the Square D LGL36400U31X, a rugged 400A, 3-pole circuit breaker designed to protect demanding electrical systems with precision. This unit is built to deliver dependable overcurrent protection in panelboards, switchboards, and control panels, helping keep critical processes running safely and smoothly.

Key specifications at a glance

• Current rating: 400A — suited for high-load feeders and large motor circuits.
• Poles: 3-Pole — ideal for three-phase systems, providing balanced interruption across all phases.
• Breaker type: Circuit Breaker — reliable fault-current interruption for safe, automatic shutdown during overloads.
• Applications: Flexible use in panelboards, switchboards, and control panels.
• Ideal for: Industrial, commercial, and OEM environments needing durable protection in distribution panels and motor control centers.

Practical use cases and benefits

In facilities with substantial electrical demand, the LGL36400U31X safeguards three-phase motors, drives, and feeders, reducing the risk of equipment damage and unplanned downtime. It’s well-suited for motor control centers (MCCs) and other large distribution setups where a single protective device must reliably cover key circuits.

Why choose this model matters: the 400A, 3-pole configuration aligns with the needs of three-phase distribution and control-panel layouts, delivering dependable protection where it matters most. It’s a purpose-built solution for industrial workflows, commercial power systems, and OEM assemblies that require robust, long-lasting current protection.