Square D MH364002100 Circuit Breaker, 400A, 3-Pole, 600V

The Square D MH364002100 Circuit Breaker is built for rugged industrial environments where reliable protection is non-negotiable. With a robust 400 A rating, a three-pole design for true three-phase protection, and a 600 V maximum system voltage, this breaker is purpose-built for demanding electrical service, maintenance, and replacement projects.

What makes this breaker stand out

• High-current protection: 400 A rating handles substantial loads common in industrial facilities, helping prevent downstream damage and unplanned downtime.
• Three-pole configuration: Ensures balanced protection across all three phases, which is essential for motors, drives, and other three-phase equipment.
• 600 V operating range: Suitable for typical industrial distribution networks and equipment designed for higher voltage service.
• OEM-part integrity: Identified by the exact part number MH364002100—verify fit by part number and application requirements to ensure seamless compatibility.
• Industrial-focused purpose: Specifically described for industrial service, maintenance, and replacement scenarios, making it a trusted choice for ongoing facility upkeep.
• Supportive compatibility checks: If you’re unsure whether this exact model fits your panel or disconnect, we can assist with compatibility confirmation based on your application.

Ideal use cases and applications

• Replacing a failed breaker in existing Square D installations that require a 400 A, 3-pole, 600 V protective device.
• Protecting feeders and distribution circuits in manufacturing floors, warehouses, and processing facilities.
• Integrating into new installations where three-phase protection is needed for motors, conveyors, pumps, and HVAC systems operating at up to 600 V.
• Maintenance projects where a sturdy, Field-tested Square D solution is preferred to minimize downtime and simplify future servicing.

Compatibility and how to confirm fit

Always verify compatibility by matching the exact part number, MH364002100, to your equipment specifications and application requirements. If you’re unsure about fit, send us a message with your panel or disconnect details and we’ll help verify whether this MH-series breaker is the right choice for your system.

Key specifications at a glance

• Part number: MH364002100
• Manufacturer: Square D
• Product type: Circuit Breaker
• Amperage: 400 A
• Poles: 3
• Voltage: 600 V