Eaton HMCP400X5C - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Eaton HMCP400X5C is a 400A, 600V, 3-pole molded case circuit breaker designed to deliver dependable branch circuit protection in panelboards and load centers. Built for reliable performance in demanding commercial and light industrial environments, this breaker combines compact form with robust protection capabilities.

• Compact molded-case design optimizes panel space, making it easier to fit high-capacity protection into tight electrical enclosures without compromising accessibility or serviceability.
• Thermal-magnetic trip unit provides stable, repeatable protection by combining thermal overload sensing with instantaneous magnetic tripping on severe faults, reducing nuisance trips and helping protect equipment.
• OEM-compatible with matching loadcenters and panelboards for straightforward replacements and coordinated protection across Eaton-based systems.
• Three-pole configuration at 400A, 600V ideal for 3-phase circuits, delivering reliable protection for large branch circuits in commercial and light-industrial settings.
• Versatile installation scope suitable for residential panels, commercial distribution, and light industrial power distributions where space and reliability matter.

Why this matters in real-world setups: in busy facilities, panel space is at a premium and equipment downtime can be costly. The HMCP400X5C’s compact design frees room for future expansions, while its thermal-magnetic trip ensures quick, coordinated isolation of faults. The 3-pole, 400A, 600V rating supports essential motor loads, lighting feeders, and other heavy circuits common in offices, retail centers, small manufacturing, and warehouses.

Technical specifications

• Manufacturer: Eaton
• Part Number: HMCP400X5C
• Type: Thermal-magnetic molded case circuit breaker
• Amperage Rating: 400A
• Voltage Rating: 600V
• Number of Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Practical use cases include replacing a failed breaker in existing panelboards, protecting high-load feeders feeding motors or HVAC circuits, and adding reliable, code-compliant protection in new or renovated commercial or light-industrial electrical distributions. When selecting protection for your panel, the HMCP400X5C offers a proven balance of space efficiency, trip accuracy, and compatibility with Eaton loadcenters and panelboards, ensuring you meet safety requirements while keeping downtime to a minimum.