Square D | MXF36400G | Circuit Breaker | 400A | 3-Pole | 600V

Meet the Square D MXF36400G, a purpose-built circuit breaker engineered for robust protection in demanding 3-phase systems. With a 400A rating and 3-pole configuration, this breaker is designed to guard equipment and personnel in commercial and industrial applications while fitting within compatible Square D panels and switchgear.

• Current and configuration: 400A, 3-pole, 600V maximum, providing reliable protection for three-phase circuits.
• Targeted use cases: Ideal for maintenance, retrofit, and replacement projects where exact specifications and a precise fit are required.
• Compatibility reference: The part number MXF36400G is your best reference for matching panels and ratings—always confirm fit with the panel manufacturer before ordering.
• Installation mindset: Designed to integrate into compatible Square D systems, enabling straightforward replacement without extensive rewiring in supported configurations.

Why choose this MXF36400G in your next upgrade or service project? It delivers consistent, dependable protection for three-phase loads at up to 600V, helping minimize downtime and protect motors, drives, and distribution equipment. Use cases include replacing aging breakers in distribution panels, upgrading a feeder to handle increased load, or retrofitting a panel to meet new electrical demands in manufacturing floors, data centers, or processing facilities.

Practical tips for a smooth purchase

• Always verify fit and ratings with the panel documentation—the MXF36400G is the strongest compatibility reference for this exact part.
• Double-check the panel accepts a 3-pole, 400A device and that a 600V rating aligns with your system’s nominal voltage.
• Keep the replacement workflow efficient by preparing the correct torque specs and ensuring system de-energization procedures are followed during swap-out.

In short, the Square D MXF36400G is a purpose-driven choice for professionals who need a precise, reliable 400A, 3-pole, 600V circuit breaker that aligns with established Square D ecosystems. It’s built to support maintenance cycles, retrofit initiatives, and steady, safe operation of three-phase electrical networks.