Eaton HMCP400L5 - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Eaton HMCP400L5 is a 400A, 600V, 3-pole molded‑case circuit breaker designed to deliver reliable branch‑circuit overcurrent and short‑circuit protection inside panelboards and load centers. Built for demanding electrical distributions, it combines a compact form factor with dependable protection performance.

Key advantages that set this model apart:

• 400 A nominal rating handles high-load circuits without frequent trips, helping keep critical equipment powered during peak demand.
• 600 V voltage rating supports common commercial and light industrial power distribution needs, accommodating three‑phase systems with confidence.
• 3-pole design provides comprehensive protection across all phases in three‑phase installations, simplifying integration in standard panelboards.
• Thermal-magnetic trip unit offers stable, repeatable protection by combining a thermal element for overload detection and a magnetic element for instantaneous short-circuit interruption.
• Compact molded-case construction maximizes panel space and eases installation in crowded enclosures without compromising protection.
• OEM-compatible is designed to work with matching Eaton OEM load centers and panelboards for a seamless, reliable fit.
• Versatile applications ideal for residential, commercial, and light industrial electrical distributions requiring robust, predictable protection.

Specifications at a glance

• Amperage rating: 400 A
• Voltage rating: 600 V
• Number of poles: 3
• Type: Thermal-magnetic molded case circuit breaker
• Part number: HMCP400L5
• Application: Branch circuit overcurrent and short-circuit protection

Practical use and installation guidance

• Ensure panel compatibility with matching OEM loadcenters and panelboards to maintain coordinated protection and convenient replacement.
• Confirm the host panel can accommodate 400 A protection and a 3-pole device within the intended circuit layout.
• Install in accordance with OEM recommendations and standard electrical practices to guarantee proper trip performance and safe operation.
• Use this breaker for subfeed protection, service panels, and distribution blocks where three‑phase protection and space efficiency are priorities.

For electrical systems that demand dependable overcurrent and short‑circuit protection without sacrificing panel space, the Eaton HMCP400L5 delivers clear, tangible value. Its combination of a robust 400 A rating, 600 V compatibility, and a compact molded‑case design makes it a practical, reliable choice for protecting essential loads in panelboards and load centers.