Square D | MAL26400 | Circuit Breaker | 400A | 2-Pole | 600V

Protect critical equipment with confidence using the Square D MAL26400 Circuit Breaker. Delivering 400 amps of reliable, clean shutdown in a compact 2-pole, 600-volt package, this genuine Square D breaker is built for demanding maintenance, retrofit, and replacement projects where exact specs matter.

Key specifications at a glance

• Amperage: 400 A
• Poles: 2-Pole
• Voltage: 600 V
• Part number: MAL26400
• Brand: Square D

Why this MAL26400 matters for your installation: the 400A, 2-pole design provides robust protection for feeders and service connections in commercial and industrial panels. The 600V rating makes it suitable for higher voltage distribution environments, helping ensure safe, simultaneous disconnection of both conductors for enhanced protection and code compliance. Using a genuine Square D part helps maintain electrical system integrity and consistent performance over time.

Ideal applications and use cases

• Maintenance replacements in 600V panels where a precise 400A, 2-pole unit is required.
• Retrofit projects that demand exact part match to support upgraded load demands without changing the panel footprint.
• Industrial or commercial installations with heavy motor loads that rely on dependable, high-capacity protection.

How to ensure a proper fit

Before ordering, confirm that MAL26400 matches your panel’s catalog and rating. The part number is the best reference for compatibility, ensuring you get the exact Square D specification needed for safe and reliable operation.

Practical considerations and tips

• Use only in panels and bus configurations designed for MAL-series breakers to maintain proper fit and performance.
• Plan for safe handling and proper disconnection procedures when replacing or upgrading breakers in live systems.