Eaton / Cutler-Hammer HK3100 Molded Case Circuit Breaker
- 100A
- 3 Pole
- Panel Mount
Quantity
Eaton / Cutler-Hammer HK3100-R - 100A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Belonging to the Series C lineup, the Eaton HK3100 is a 3-pole, 100A molded case circuit breaker built for commercial and industrial applications. It features thermal-magnetic LI protection to safeguard critical infrastructure. This K-frame breaker mounts into Eaton panelboards, switchboards, and motor control centers. It replaces legacy Cutler-Hammer units and includes line and load lugs. Rated for 600VAC, it delivers a 65kAIC rating at 480V.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | HK3100-R |
| Series | HK |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Panel Mount |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 100kA @ 240VAC, 65kA @ 480VAC, 35kA @ 600VAC, 22kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 3 AWG - 350 kcmil |
| Max Wire | 350 kcmil |
| Min Wire | 3 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Adjustable Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment, Motor Operator, Rotary Handle |
|---|---|
| Accessories | Line and Load Lugs Included |
| Standards | CSA C22.2 No. 5, IEC 60947-2, NEMA AB 1, UL 489 |
| Approval | CE, CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, High Interrupting Capacity |
Product FAQs
6 answersWhat type of enclosures or equipment is this breaker compatible with?
This K-frame breaker is designed for installation in Eaton Series C panelboards, switchboards, and motor control centers.
What does the H in the HK3100 catalog number indicate?
The H designates this as a High Interrupting Capacity breaker within the Series C K-frame family, providing a 65kAIC rating at 480VAC to safely clear severe faults.
How does the adjustable magnetic trip function operate on this 100A breaker?
The thermal-magnetic trip unit features a fixed thermal element for overload protection and an adjustable magnetic element for short-circuit protection. The magnetic pickup can typically be set between 5 and 10 times the continuous current rating, allowing an instantaneous trip range of 500A to 1000A.
Can this unit replace older Westinghouse or Cutler-Hammer HK breakers?
Yes. Eaton acquired the Westinghouse distribution equipment business, and this Series C breaker serves as a direct, drop-in replacement for legacy Cutler-Hammer and Westinghouse HK3100 models.
Is this circuit breaker suitable for HVAC equipment protection?
Yes, this breaker is HACR rated, meaning it is certified for the safe protection of heating, air conditioning, and refrigeration equipment circuits.
What wire sizes are accepted by the terminals on this breaker?
The breaker comes equipped with line and load lugs that accommodate wire gauges ranging from 3 AWG up to 350 kcmil.
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