Eaton HMCP400G5X - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

Meet the Eaton HMCP400G5X—a 400 A, 600 V, 3-pole molded‑case circuit breaker designed to deliver dependable branch circuit protection for panelboards and loadcenters. Built to handle demanding loads, this breaker combines compact form factor with robust protection for three‑phase systems, making it a smart choice for modern electrical installations.

• Compact molded-case design maximizes panel space, enabling cleaner, easier layouts in both new builds and retrofit projects.
• Thermal‑magnetic trip unit provides stable, repeatable protection across a range of fault conditions, helping prevent nuisance trips while still delivering fast short‑circuit interruption when it matters most.
• 400 A, 600 V, 3‑pole configuration ideal for three‑phase branch circuits and higher current feeders, supporting residential, commercial, and light industrial applications.
• OEM compatibility designed to work with matching Eaton loadcenters and panelboards, ensuring seamless integration and reliable coordination with existing protection schemes.
• Protection you can trust focused on preventing damage from overcurrents and short circuits in critical distribution points—panels, feeders, and service equipment.

Why professionals choose the HMCP400G5X

For electricians and facilities managers, this breaker offers a precise balance of capacity and control. Its 400 A rating supports sizable feeders without requiring multiple devices, while the 600 V rating gives you flexibility across commercial and light industrial environments. The compact profile helps you fit into tight panel enclosures, reducing installation complexity and helping maintain orderly wiring aisles. When safety and reliability are non‑negotiable, the HMCP400G5X provides a dependable shield against overcurrent and short circuits for essential electrical systems.

Ideal use cases

• New panel installations in commercial spaces and light industrial facilities requiring sturdy three‑phase protection
• Retrofits or uprates in existing panelboards and loadcenters needing high‑current three‑pole protection
• Service panels and main distribution locations where OEM compatibility simplifies ongoing maintenance
• Any application demanding precise thermal‑magnetic protection to minimize downtime and protect downstream equipment

Technical specifications at a glance

• Manufacturer: Eaton
• Part Number: HMCP400G5X
• 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

Choose the HMCP400G5X for a proven combination of high current capacity, reliable protection, and panel‑friendly integration. It’s designed to keep your electrical distribution resilient, organized, and ready to support the demands of modern loads.