Eaton HMCP400K5Y - 400 A, 600 V, 3-Pole Circuit Breaker | AmpState

The Eaton HMCP400K5Y stands up to demanding electrical environments as a 400 A, 600 V, 3-pole molded case circuit breaker engineered for reliable branch circuit overcurrent and short‑circuit protection. Built to integrate smoothly with Eaton panelboards and load centers, this breaker is a precise, space‑savvy solution for modern electrical rooms, service upgrades, and retrofit projects.

• Compact molded case design maximizes panel efficiency by saving space without compromising protection or accessibility, making it ideal for tight electrical chambers and crowded load centers.
• Thermal‑magnetic trip unit delivers stable, repeatable protection across temperature changes and load fluctuations, reducing nuisance trips and ensuring dependable performance when it matters most.
• 3‑pole configuration supports three‑phase circuits, enabling clean, coordinated power distribution for commercial and light industrial equipment.
• 400 A at 600 V rating handles robust branch circuits while remaining compatible with standard industrial and commercial equipment, providing a wide operating envelope for diverse installations.
• OEM‑level compatibility designed to pair with matching Eaton OEM load centers and panelboards, simplifying replacements, upgrades, and panel modernization projects.
• Versatile use across settings ideal for residential, commercial, and light industrial applications where dependable protection and straightforward maintenance are priorities.

Why this matters for your project

With the HMCP400K5Y, you’re choosing a proven solution that aligns with real-world electrical demands—short‑circuit events, prolonged overloads, and the need for predictable trips. Its compact footprint means you can fit more protection in the same panel footprint, while the thermal‑magnetic trip unit provides consistent performance across a broad range of operating conditions. This isn’t just a breaker; it’s a reliable safeguard for wiring, devices, and occupants.

Ideal applications

Use this 3‑pole molded case breaker for:

• Updating or expanding panelboards in offices, retail spaces, and multi‑tenant buildings
• Protecting feeders and branch circuits in light industrial environments
• Replacing aging breakers in existing Eaton load centers to maintain compatibility and reliability

Key specifications

• Manufacturer: Eaton
• Part Number: HMCP400K5Y
• Type: Thermal‑magnetic molded case circuit breaker
• Amperage Rating: 400 A
• Voltage Rating: 600 V
• Number of Poles: 3
• Applications: Branch circuit overcurrent and short‑circuit protection in panelboards and load centers

Choose the Eaton HMCP400K5Y for a dependable, space‑efficient, and OEM‑compatible protection solution that keeps critical electrical systems running smoothly across residential, commercial, and light industrial environments.