Eaton HMCP100R3C Cutler-Hammer HMCP Series Thermal Magnetic Circuit Breakers

Here's a comprehensive overview of the Eaton HMCP100R3C / Cutler-Hammer HMCP Series circuit breaker:

Eaton HMCP100R3C Specifications

Type: Heavy-duty molded case protector (MCCP)

Ampere Rating: 100A

Poles: 3P (3-phase)

Voltage Rating:

480V AC (standard)

600V AC (verify specific model)

Interrupting Capacity: 65kA @ 480V

Trip Type: Thermal-magnetic (combined overload + short-circuit protection)

Standards: UL 489, CSA, IEC

Key Features

Motor Circuit Protection:

Designed specifically for motor applications

Thermal element protects against overloads

Magnetic element provides instantaneous short-circuit protection

Industrial-Grade Construction:

Robust design for harsh environments

Suitable for high-vibration applications

Mounting Options:

Available in fixed or plug-in versions

Compatible with Eaton C-Series and Pow-R-Line panels

Comparison with Similar Models

Model Poles Current Protection Type Neutral Pole Best For

HMCP100R3C 3P 100A Thermal-magnetic No Motor circuits

HMCP100R4C 4P 100A Magnetic-only Yes 3P+N systems

GJL100 3P 100A Thermal-magnetic No General purpose

Installation Notes

Thermal Protection: Built-in thermal element provides overload protection

Coordination: May be used with motor starters (combinations require verification)

Accessories: Available with shunt trips, auxiliary switches, and alarm contacts

Typical Applications

Industrial motor control centers

Pump and compressor systems

Heavy machinery power distribution

Manufacturing equipment protection

Replacement Information

Direct Replacement: HMCP100R3C (current production model)

Cross References:

Cutler-Hammer HMCP100R3C (same device)

Eaton FAZ-C100/3 (similar magnetic-only version)