Eaton HMCP100H3C Cutler-Hammer HMCP Series Thermal Magnetic Circuit Breakers

The Eaton HMCP100H3C (also sold under the Cutler-Hammer brand) is a 100A, 3-pole, 480V/600V AC magnetic-only circuit protector from Eaton's HMCP Series, designed specifically for heavy-duty motor circuit protection.

Key Specifications

Type: Magnetic-only circuit 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: Magnetic-only (instantaneous trip)

Standards: UL 489, CSA

Critical Features

Motor-Specific Protection:

Provides instantaneous short-circuit protection only

Must be used with separate overload protection (e.g., Eaton EOCR relay)

Designed to coordinate with motor starting currents

Heavy-Duty Construction:

Higher withstand rating than standard breakers

Rugged design for industrial environments

Mounting:

Fixed or plug-in versions available

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

Comparison with Similar Models

Model Protection Type Overload Protection Best For

HMCP100H3C Magnetic-only Requires external relay Heavy motor loads

HMCP100R3C Thermal-magnetic Built-in General motor circuits

GJL100 Thermal-magnetic Built-in Non-motor loads

Installation Requirements

Mandatory: Must be paired with properly sized overload relay

Coordination: Select overload relay to match motor FLA

Accessories: Available with shunt trips, auxiliary contacts

Typical Applications

Large industrial motors (pumps, compressors)

High-inrush applications

Mission-critical motor circuits

Ordering Information

Catalog Number: HMCP100H3C

Replacement: Current production model

Cross Reference: Cutler-Hammer HMCP100H3C