Eaton HMCP100L3 Cutler-Hammer HMCP Series Thermal Magnetic Circuit Breakers

The Eaton HMCP100L3 (also sold under the Cutler-Hammer brand) is a 100A, 3-pole thermal-magnetic circuit breaker from Eaton's HMCP Series, designed for motor circuit protection and general power distribution in industrial applications.

Key Specifications:

Type: Thermal-magnetic molded case circuit protector (MCCP)

Current Rating: 100A

Poles: 3P (3-phase)

Voltage Rating:

480V AC (standard)

600V AC (verify specific model)

Interrupting Capacity: 65kA @ 480V AC

Trip Type:

Thermal (overload protection)

Magnetic (short-circuit protection)

Standards: UL 489, CSA

Key Features:

Dual Protection:

Thermal element for overload protection

Magnetic element for instantaneous short-circuit protection

Motor Circuit Applications:

Suitable for motor branch circuit protection

Can be used with or without additional overload relay (depending on application requirements)

Industrial Design:

Heavy-duty construction

High interrupting capacity

Comparison with Similar HMCP Models:

Model Protection Type Overload Protection Best For

HMCP100L3 Thermal-magnetic Built-in General motor circuits

HMCP100H3C Magnetic-only External required Heavy motor loads

HMCP100R3C Thermal-magnetic Built-in Standard motor circuits

Installation Notes:

Can be used as standalone protection (unlike magnetic-only HMCP models)

For critical motor applications, consider adding an overload relay

Non-adjustable trip settings

Available in fixed or plug-in versions

Typical Applications:

Motor control centers

Industrial machinery

Pump and compressor systems

Power distribution panels

Ordering Information:

Current Catalog Number: HMCP100L3

Replacement: Still in production

Cross Reference: Cutler-Hammer HMCP100L3