Eaton HMCP400R5X - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

Eaton HMCP400R5X is a robust 400 A, 600 V, 3-pole molded case circuit breaker designed to deliver reliable branch circuit protection in panelboards and load centers. Built with a focus on space efficiency and dependable performance, this unit helps safeguard electrical systems across residential, commercial, and light industrial environments.

Key advantages of the HMCP400R5X:

• Compact molded case design frees panel space while delivering full protection for demanding circuits.
• Thermal-magnetic trip unit provides stable, repeatable protection against overcurrent and short-circuit events, reducing nuisance trips and ensuring consistent operation.
• 3-pole configuration for balanced protection across all phases in three-phase systems.
• 400 A rating at 600 V offers high-current capability suitable for main or sub-feed protection in larger panelboards and load centers.
• OEM loadcenter compatibility designed to integrate seamlessly with matching Eaton loadcenters and panelboards for streamlined installation and reliability.
• Versatile applications ideal for residential, commercial, and light industrial circuits that require strong protection without sacrificing space or performance.

Why this breaker stands out

Unlike generic substitutes, the HMCP400R5X is purpose-built to align with Eaton’s OEM panel ecosystems, ensuring precise trip characteristics and dependable coordination with other protection devices. The molded case design translates to rugged durability in challenging environments, while the thermal-magnetic mechanism delivers fast, predictable responses when faults occur. This combination makes it well-suited for main feeders, branch circuits, and critical loads where reliability is non-negotiable.

Use cases and practical scenarios

• Upgrading an aging panel to meet current protection standards in a mid-size home or commercial space.
• Providing branch circuit protection for heavy-demand equipment in light industrial setups, such as small manufacturing or workshop environments.
• Installing alongside compatible OEM loadcenters to ensure coherent protection strategies across multiple panels.
• Replacing failing or undersized breakers that risk nuisance trips or insufficient protection during fault events.

Technical specifications at a glance

• Manufacturer: Eaton
• Part number: HMCP400R5X
• 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 in panelboards and load centers

What to consider during installation and use

Ensure compatibility with the specific OEM panelboard or load center and follow manufacturer installation guidelines. The HMCP400R5X is designed to deliver reliable protection in crowded electrical environments, so verify that the panel’s rating and bus configuration align with a 3-pole, 400 A, 600 V device. Regular inspection and torque checks on connections help maintain optimal performance and longevity of the protection system.