Eaton HMCP400N5 - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Eaton HMCP400N5 is a 400 A, 600 V, 3-pole molded case circuit breaker engineered to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for space-efficient panel layouts and consistent performance, it’s a reliable choice for modern electrical rooms.

• Compact molded case design maximizes panel space, allowing cleaner, more efficient electrical layouts in both new installs and panel upgrades.
• Thermal-magnetic trip unit provides stable, repeatable protection by combining thermal sensing for overload with magnetic actuation for rapid response to short circuits.
• OEM-compatible designed to work with matching Eaton OEM load centers and panelboards, ensuring a straightforward fit and streamlined replacement when upgrading or servicing panels.
• Versatile applications suitable for residential, commercial, and light industrial environments that require reliable 3-pole protection for three-phase systems.

Specifications at a glance

• Manufacturer: Eaton
• Part Number: HMCP400N5
• 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

Smart use cases for the HMCP400N5

• Feed and protect essential services in mid-size residential panels or multi‑load centers where a single 3‑pole 400 A breaker is needed.
• Provide main or sub-feed protection in light commercial panelboards that energize HVAC, pumps, or other three-phase equipment.
• Support reliable startup and shutdown of three‑phase motors in small industrial spaces, with fast fault clearing to minimize equipment damage.

The HMCP400N5 delivers a clear value proposition: it combines a compact footprint, dependable thermal-magnetic protection, and guaranteed compatibility with Eaton’s own panel systems. For installers and facilities managers, that means easier planning, quicker replacements, and predictable protection performance. If you need robust 3‑pole protection for a 400 A, 600 V circuit in residential, commercial, or light industrial settings, the Eaton HMCP400N5 is engineered to perform when it matters most.