Eaton HMCPE100T3Y - 100 A, 480 V, 3-Pole Circuit Breaker | AmpState

Eaton HMCPE100T3Y is a 100 A, 480 V, 3-pole molded case circuit breaker engineered to deliver dependable branch circuit overcurrent and short-circuit protection in panelboards and loadcenters.

Take advantage of a compact molded-case design that maximizes panel space without sacrificing protection. The integrated thermal-magnetic trip unit delivers stable, repeatable protection across varying temperatures and fault scenarios, helping to minimize nuisance trips while ensuring fast response to actual faults.

Designed for seamless compatibility, the HMCPE100T3Y is built to pair with matching OEM loadcenters and panelboards, ensuring precise fit, coordinated protection, and straightforward installation. Its 3-pole configuration is ideal for 480 V systems and three-phase feeders commonly found in commercial, light industrial, and select residential applications that require higher-voltage protection.

• Compact molded case design optimizes panel layout and wiring efficiency
• Thermal-magnetic trip unit provides reliable protection across operating conditions
• Guaranteed compatibility with Eaton OEM loadcenters and panelboards
• Suitable for residential, commercial, and light industrial deployments

Who benefits most: electrical contractors, facilities managers, and panel builders upgrading or expanding three-phase, high-voltage distribution networks. Use cases include feeding 480 V three-phase circuits in commercial spaces, protecting new or retrofit feeders in panelboards, and adding reliable subpanel protection for demanding loads.

• Manufacturer: Eaton
• Part number: HMCPE100T3Y
• Type: Thermal-magnetic molded case circuit breaker
• Amperage rating: 100 A
• Voltage rating: 480 V
• Poles: 3
• Application: Branch circuit overcurrent and short-circuit protection

Compared to non-molded or single-mechanism breakers, this Eaton design consolidates space-efficient protection with precise coordination for modern panel systems. It’s a practical choice when you need reliable, long-term protection for high-voltage distributions while keeping installation clean, accessible, and compliant with OEM equipment.