Eaton HMCP400X5 - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

Meet the Eaton HMCP400X5 — a robust 400 A, 600 V, 3-pole molded case circuit breaker designed to deliver reliable branch-circuit overcurrent and short-circuit protection in panelboards and loadcenters. Built for residential, commercial, and light industrial distribution, it provides dependable protection where it’s needed most.

What makes the HMCP400X5 unique

• Space-efficient molded case design maximizes panel real estate and simplifies wiring in compact installations.
• Thermal-magnetic trip unit delivers stable, repeatable protection by combining precise thermal overload sensing with an instantaneous magnetic trip for short circuits.
• 3-pole configuration supports three-phase distribution and aligns with common panelboard layouts for reliable, coordinated protection.
• 600 V rating enables use in higher-voltage residential, commercial, and light industrial applications.
• OEM-loadcenter compatibility is designed to drop into Eaton’s matching loadcenters and panelboards for straightforward replacement and consistent performance.

Technical specifications

• Manufacturer: Eaton
• Part Number: HMCP400X5
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 400 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Ideal applications and practical use

The HMCP400X5 is well-suited for larger feeders and main protection in distribution panels found in residential complexes, commercial spaces, and light industrial environments. Use it to protect heavy-load circuits, motor feeders, or critical branch circuits where reliable trip performance is essential. When upgrading or retrofitting, pairing this breaker with matching OEM loadcenters ensures coordinated protection and simplified maintenance.

Installation, compatibility, and practical tips

• Pair the HMCP400X5 with Eaton’s compatible loadcenters and panelboards to guarantee fit, fitment integrity, and consistent trip characteristics.
• Verify that your installation aligns with the 400 A, 600 V rating and the 3-pole configuration to meet system design requirements.
• Follow applicable electrical codes and Eaton installation guidelines to ensure safe, reliable operation over the life of the panel.

Equip your electrical distribution with the Eaton HMCP400X5 for durable, precise protection that helps keep large feeders and critical circuits safe, compliant, and efficiently managed.