Square D | MH36400CBA | Circuit Breaker | 400A | 3-Pole | 600V

Square D MH36400CBA Circuit Breaker — 400A, 3-Pole, 600V

This high-capacity circuit breaker from Square D is built for reliability in demanding electrical systems. The MH36400CBA is ideal for maintenance, retrofit, and replacement projects where exact specifications matter, ensuring you restore three-phase protection quickly and confidently.

Designed for compatibility with Square D panels and enclosures, this 400A, 3-pole unit delivers synchronized protection across all phases in systems up to 600V. Its precise part-number reference (MH36400CBA) is the best way to guarantee a match with your existing equipment.

• Amperage: 400A — for high-current three-phase circuits in commercial or light-industrial settings
• Poles: 3-Pole — provides coordinated protection across all three phases
• Voltage: 600V — suitable for standard industrial distribution networks
• Compatibility: Part number MH36400CBA ensures you’re selecting the exact replacement for your Square D system
• Application: Primarily intended for maintenance, retrofit, and replacement where matching specs are required

Important compatibility note: Confirm fit and ratings before ordering. The part number MH36400CBA is the best reference for compatibility with your panel labeling and service configuration.

Ideal use cases include:

• Replacing a failed breaker in compatible Square D panels
• Retrofit projects where a 400A, 3-pole, 600V unit is required
• Maintenance shutdowns that demand quick, reliable restoration of three-phase power

Practical installation and handling tips

• Power down and follow appropriate lockout/tagout procedures before replacing a breaker
• Verify your panel’s labeling matches a 400A, 3-pole, 600V configuration
• Ensure the replacement matches the mounting and bus connection style used in your enclosure

Choose Square D for dependable circuit protection and a clear path to serviceability in high-demand electrical environments. The MH36400CBA is designed to meet the precision requirements of professional electrical installations, delivering peace of mind when upgrading or maintaining your three-phase power distribution.