Square D | LGP36400U31X | Circuit Breaker | 400A | 3-Pole | 600V

The Square D LGP36400U31X circuit breaker is your precise, dependable solution for maintenance, retrofit, and replacement projects where exact specification matching matters. Designed to integrate seamlessly into compatible Square D panels, this 400 A, 3-pole unit delivers reliable protection for three-phase electrical systems at up to 600 V.

Key Specifications

• Part Number: LGP36400U31X
• Amperage: 400 A
• Poles: 3-Pole
• Voltage: 600 V
• Series: LGP
• Type: Circuit Breaker
• Applications: Maintenance, Retrofit, Replacement

Why this LGP36400U31X stands out

• Exact part-number alignment ensures compatibility with Square D panels and related accessories, reducing guesswork during replacements or upgrades.
• Three-pole design is ideal for three-phase electrical environments, providing appropriate protection for larger loads and equipment.
• 600 V rating supports common industrial and commercial mains, enabling safe protection across a range of applications.
• Built for retrofit and replacement scenarios, helping you modernize or refresh existing electrical infrastructure without extensive panel modifications.
• Part of the Square D lineup, offering dependable performance and predictable interaction with other Square D components.

Ideal use cases

• Maintenance cycles in facilities with older or aging panels that require a like-for-like replacement.
• Retrofits where system loads have increased and upgrading to a higher-current breaker is necessary, while staying within existing panel architecture.
• Replacement during panel refresh projects to maintain consistency with the original protection plan and wiring schemes.

Fit, verification, and installation tips

• Confirm fit and ratings before ordering. The part number LGP36400U31X is the primary reference for compatibility.
• Check that your panel accepts LGP-series breakers and that the surrounding bus and mounting hardware match the unit’s specifications.
• Follow standard electrical safety practices: disconnect power, use insulated tools, and consult your panel’s labeling for proper installation guidelines.
• After installation, verify proper alignment and secure mounting to ensure reliable operation under voltage and load conditions.

When you need a precise, compatible 400 A, 3-pole, 600 V circuit breaker for maintenance, retrofit, or replacement, the Square D LGP36400U31X delivers the trusted performance you expect—paired with the confidence that comes from using the exact part reference for your system.