Square D | MAF36400 | Circuit Breaker | 400A | 3-Pole | 600V

The Square D MAF36400 is a robust 400A, 3-pole circuit breaker designed for demanding electrical environments. Engineered for maintenance, retrofit, and replacement projects, this unit helps you maintain reliable protection in medium- to high-power systems where precise matching of specs matters.

• Amperage: 400A
• Poles: 3-Pole
• Voltage: 600V
• Reference: Part number MAF36400 serves as the best compatibility reference.
• Application: Ideal for upgrade, service, or replacement tasks where exact spec alignment is required.

What makes the MAF36400 stand out

In industrial and commercial panels, reliable interruption at the exact current and configuration is essential. The MAF36400 delivers a precise 400A capacity across three phases, enabling synchronized protection for multi-phase circuits at voltages up to 600V. Because it’s a genuine Square D component identified by the exact part number, you gain confidence that it will drop into the same footprint, wiring scheme, and electrical characteristics as the original device.

Key benefits include:

• Exact-match compatibility: Use the MAF36400 part number to verify fit and ratings before ordering, ensuring seamless replacement without modification.
• Three-phase protection: The 3-pole design provides balanced interruption across all phases, helping minimize fault conditions and protect downstream equipment.
• High-voltage readiness: Rated for systems up to 600V, suitable for a wide range of industrial and commercial installations.
• Maintenance-friendly retrofit: Designed to slot into established panels where a like-for-like replacement is required, reducing downtime and project risk.

Who's this for and how you’ll use it

This breaker is ideal for facilities managers, electrical contractors, and maintenance teams overseeing three-phase electrical distributions in warehouses, manufacturing floors, and large commercial buildings. Use cases include:

• Upgrading aging protection in a legacy panel to restore reliable fault interruption.
• Replacing a failed 400A, 3-pole 600V breaker with an exact spec match to minimize compatibility issues.
• Retrofit projects where maintaining the original electrical architecture is critical for safety and compliance.

Before you order, confirm fit and ratings against your panel’s manufacturer documentation. The MAF36400 part number is the most reliable reference for compatibility, helping you avoid mismatches and ensure a smooth installation process.

Trust in a purpose-built Square D solution that emphasizes precise specs, dependable protection, and a straightforward path to reliable three-phase circuit interruption.