Square D | MHP36400V | Circuit Breaker | 400A | 3-Pole | 36400V

Square D MHP36400V Circuit Breaker — a rugged, high-capacity protection solution designed for demanding industrial environments. With a 400 A rating, 3-pole configuration, and a 36,400 V rating, this breaker is built to safeguard large feeders and complex power distribution networks. Whether you’re performing maintenance, retrofit, or replacement, this device aligns precisely with your Square D system’s specs.

Key specifications

• Amperage: 400 A
• Poles: 3-Pole
• Voltage: 36,400 V
• Part number: MHP36400V

Why this breaker stands out

Engineered for reliability in high-load, high-voltage feeders, the MHP36400V delivers dependable protection for critical equipment. Its mounting pattern and form factor are tailored to integrate with Square D panels, enabling a straightforward, drop-in replacement in compatible installations and minimizing downtime during upgrades.

What problems it solves

Protects large electrical feeders from overloads and short circuits, reducing the risk of equipment damage and unplanned outages. In retrofit projects, it preserves existing system architecture while delivering modern protection, helping you bring older installations up to current standards without a full panel replacement.

Fit, compatibility, and best practices

Before ordering, confirm fit and ratings based on your specific setup. The part number MHP36400V is the best reference for compatibility, ensuring correct trip characteristics, mounting alignment, and bus connections within your distribution panel.

Ideal use cases

Best suited for industrial facilities with high-power feeders, large-scale data center power distribution, manufacturing lines, and utility-grade panels that rely on Square D protection. It serves as a main feeder breaker or sub-feed protection in robust, 3-phase distribution networks.

Installation and maintenance tips

• Have a qualified electrician perform installation and ensure equipment is de-energized according to safety standards.
• Inspect the breaker for any signs of damage or contamination before installation. Store components in clean, dry conditions.
• Adhere to manufacturer torque specifications to secure reliable electrical connections.