Square D | MA26400 | Circuit Breaker | 400A | 2-Pole | 600V

Meet the Square D MA26400 circuit breaker — a rugged, OEM-grade protection device designed for demanding 600V systems. With a 400A capacity and a 2-pole configuration, it’s built to guard high-current circuits in commercial and light industrial panels where reliability matters most.

Why the MA26400 stands out

• Authentic Square D part: the MA26400 provides the best compatibility reference for Square D/Schneider panels and assemblies
• High-current protection: supports 400 amperes for robust, safeguarded circuits
• Two-pole design: efficient protection for dual-conductor circuits requiring shared interruption
• 600V rating: suitable for industrial distribution and equipment protection in higher-voltage environments
• Maintenance-friendly: ideal for retrofit and replacement projects when matching specs are essential
• Clear fit guidance: the provided notes emphasize confirming fit and ratings before ordering to ensure proper operation

Ideal use scenarios

Designed for situations where you need precise, OEM-matched protection: replacing worn or failed breakers in 600V panels, upgrading circuitry in commercial facilities, or performing retrofit work that demands exact amperage (400A) and voltage (600V) specifications.

How to verify compatibility

Because the MA26400 is identified by a specific part number, use MA26400 as your primary reference when checking panel compatibility. Before purchasing, compare your panel model, bus configuration, and the required amperage and voltage to ensure a seamless fit and uninterrupted protection.

Technical snapshot

• Amperage: 400 A
• Poles: 2-Pole
• Voltage: 600 V

For reliable, OEM-grade protection of high-demand circuits, the Square D MA26400 delivers consistent performance and peace of mind in demanding electrical environments.