Eaton HMCP400F5 - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

Eaton HMCP400F5: 400 A, 600 V, 3-Pole Molded-Case Circuit Breaker for Reliable Panel Protection

The Eaton HMCP400F5 is a high-capacity, three-pole molded-case circuit breaker designed to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. With a 400 A rating and a 600 V maximum, it is built to handle demanding commercial, light industrial, and residential installations where reliable protection matters most.

What sets this breaker apart is its compact molded-case design, which helps maximize panel space without compromising protection. The thermal-magnetic trip unit delivers stable, repeatable performance across varying electrical loads—giving you precise protection during normal operation and rapid response during fault conditions. When paired with matching Eaton HMCP loadcenters or OEM-labeled panelboards, the HMCP400F5 integrates smoothly into existing designs, ensuring consistent protection and easier maintenance or replacement.

Designed for real-world use, it protects essential circuits in a wide range of environments—from office buildings and retail spaces to light manufacturing and mechanical rooms. Whether you’re upgrading an aging panel, configuring a new installation, or replacing a like-for-like device, this breaker provides the reliability and compatibility you need.

Key Features and Benefits

• Compact molded-case design maximizes panel space and simplifies installation in tight electrical enclosures.
• Thermal-magnetic trip unit delivers stable protection for both long-term overcurrents and instantaneous short circuits, reducing nuisance trips and equipment wear.
• 400 A, 600 V, 3-pole configuration ideal for three-phase feeders and large branch-circuit protection in commercial and light industrial settings.
• OEM-compatible designed to work with matching Eaton HMCP panelboards and other OEM-labeled loadcenters for a seamless retrofit or new-build.
• Versatile application suitable for residential, commercial, and light industrial protection scenarios, from service entrances to motor feeders.

Use Cases: Real-World Scenarios

• Protect large branch circuits in commercial panelboards serving lighting, outlets, and HVAC equipment.
• Replace aging breakers in existing HMCP or OEM-labeled loadcenters with a like-for-like 400 A, 3-pole solution to restore reliable protection.
• Install as a main or sub-feed protective device in three-phase distribution networks up to 600 V.
• Integrate into new-builds where compact panel design and robust overload/short-circuit protection are priorities.

Technical Snapshot

• Manufacturer: Eaton
• Part Number: HMCP400F5
• 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 short, the Eaton HMCP400F5 delivers precise, dependable protection in a compact form factor, with OEM-friendly compatibility that makes it a practical, long-lasting choice for professional electrical installations. Choose this breaker when you need robust three-phase protection, efficient panel utilization, and seamless integration with Eaton HMCP or OEM-labeled loadcenters.