Eaton HMCP400G5Y - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

Eaton HMCP400G5Y is a 400A, 600V, 3-pole molded case circuit breaker designed to protect panelboards and load centers from overcurrent and short circuits. Its compact profile and dependable thermal-magnetic trip unit deliver reliable protection for demanding electrical installations.

Designed to integrate seamlessly with matching OEM load centers and panelboards, the HMCP400G5Y offers a streamlined installation and consistent performance across the system. This 3-pole configuration is ideal for three‑phase applications, delivering robust protection in residential, commercial, and light industrial environments.

Key advantages

• Space-efficient design: Compact molded case construction frees up panel space, helping you design efficient, scalable electrical cabinets.
• Thermal-magnetic trip: Delivers stable, repeatable protection by responding to both overloads and short circuits, reducing nuisance trips and enhancing reliability.
• Three-pole configuration: Suited for three-phase systems with a 400A rating at 600V, capable of handling substantial loads safely.
• OEM-compatible: Engineered for use with matching Eaton OEM load centers and panelboards, ensuring compatibility and straightforward maintenance.
• Versatile application: Ideal for branch circuit overcurrent and short-circuit protection across a range of settings from small to mid-sized facilities.

Use cases and practical scenarios

• Protecting main feeders and branch circuits in panelboards for commercial spaces with three-phase service.
• Providing reliable protection in load centers within light industrial installations.
• Replacing or upgrading existing breakers in compatible Eaton OEM panels to maintain system integrity and safety.

Technical specifications

• Manufacturer: Eaton
• Part number: HMCP400G5Y
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 400 A
• Voltage rating: 600 V
• Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Choose the HMCP400G5Y for a reliable, space-conscious protection solution that integrates smoothly with Eaton panel ecosystems, delivering consistent performance and easier maintenance in residential, commercial, and light industrial setups.