Square D | LGA36400CU44X | Circuit Breaker | 400A | 3-Pole

Square D LGA36400CU44X is a rugged 400A, 3-pole circuit breaker designed for demanding electrical environments. This OEM device is the right choice for maintenance, retrofit, or replacement projects where exact specifications matter, delivering reliable protection and consistent performance within Square D panel systems.

Whether you’re upgrading an aging panel, swapping in a failed unit, or doing routine maintenance, this 3-pole breaker provides the robust current handling and clear trip protection needed in commercial or industrial applications. The part number LGA36400CU44X is the trusted reference for compatibility, so verify that this model matches your panel’s requirements before ordering.

Key specifications and what they mean for you

• Amperage: 400A — ample capacity for high-demand circuits and main-breaker replacements in larger systems.
• Poles: 3-Pole — designed for three-phase electrical setups common in commercial power distribution.
• Part number: LGA36400CU44X — using the exact model ensures proper fit, electrical characteristics, and compatibility with Square D panels.

Ideal use cases

• Maintenance projects where a precise, OEM replacement is required to restore original protection curves and trip behavior.
• Retrofit upgrades in facilities transitioning to higher-current distribution without changing the overall panel architecture.
• Replacement of a failed or obsolete breaker in systems that depend on Square D reliability and compatibility.

Why this model stands out

• Authentic Square D reliability: Built to meet the stringent standards of commercial and industrial electrical systems, delivering predictable performance under load.
• Exact compatibility: The LGA36400CU44X part number is your best reference to ensure a correct fit across compatible Square D panels.
• Clear path to compliance: Using the correct amperage and pole configuration reduces the risk of improper protection, helping you meet safety and code requirements.

Practical tips for a smooth installation

• Always confirm fit and ratings against your panel model before purchase. Even small deviations in model number can affect compatibility and protection characteristics.
• Prepare the workspace with the applicable safety procedures and ensure the main power is isolated before replacing a breaker.
• Keep a record of the part number (LGA36400CU44X) for future maintenance needs or when sourcing replacement units.

Choosing the Square D LGA36400CU44X means prioritizing reliability, precise compatibility, and a clear path to dependable protection in your 400A, 3-pole installations. It’s the practical, exact-match solution for professionals who insist on OEM quality when maintenance, retrofit, or replacement is on the schedule.