Eaton HMCP400L5X - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Eaton HMCP400L5X is a high-capacity, 3-pole molded case circuit breaker rated at 400 A and 600 V, built to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters. Available through AmpState, this breaker is designed to meet the demanding needs of commercial, residential, and light-industrial electrical installations while fitting seamlessly into your existing Eaton ecosystem.

• Compact molded-case design: Maximizes panel space and simplifies layout, helping you achieve cleaner, more efficient panel installations.
• Thermal-magnetic trip unit: Delivers stable, repeatable protection by reliably responding to overloads and short circuits, reducing nuisance trips and ensuring long-term reliability.
• 3-pole configuration for three-phase systems: Provides coordinated protection across all three phases up to 600 V, ideal for modern commercial and light-industrial power networks.
• 400 A continuous rating: Supports heavy-duty branch circuits without compromising protection, making it suitable for high-load panels and distribution nodes.
• OEM loadcenter compatibility: Crafted to be drop-in compatible with matching Eaton OEM loadcenters and panelboards for straightforward retrofits and upgrades.
• Versatile applications: An excellent choice for residential, commercial, and light-industrial environments that require reliable overcurrent and short-circuit protection.

Use cases include upgrading aging panels to handle higher loads, equipping new three-phase installations with robust protection, and simplifying panel design by consolidating multiple protections into a single, reliable 3-pole device. The HMCP400L5X is purpose-built for environments where space is at a premium, yet protection must be uncompromising and consistent across all phases.

How it helps you solve real-world problems: with its compact form, proven thermal-magnetic protection, and easy compatibility with Eaton loadcenters, this breaker minimizes installation complexity while maximizing panel safety and reliability. It’s the practical, scalable choice when you need solid, industry-standard protection that aligns with your existing Eaton infrastructure.

Practical tips for selection and installation: verify your panelboard is rated for molded-case breakers and designed to accept a 3-pole, 400 A device up to 600 V. Pair the HMCP400L5X with compatible OEM loadcenters for a clean retrofit, and ensure installation is performed by qualified personnel following applicable electrical codes. With Eaton HMCP400L5X, you’re choosing a proven solution that combines space efficiency, robust protection, and straightforward integration.