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Eaton / Westinghouse G3100 Molded Case Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Eaton / Westinghouse
G3100
Molded Case Circuit Breaker
Brand
Eaton / Westinghouse
SKU
G3100
Quantity
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Eaton / Westinghouse G3100 - 100A 3 Pole Molded Case Circuit Breaker
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Description
Serving as a drop-in replacement for legacy systems, the Eaton G3100 3-pole, 100A molded case circuit breaker belongs to the Series C G-Frame family. This bolt-on MCCB installs into older Westinghouse and Cutler-Hammer panelboards or motor control centers. It serves as an exact legacy substitute, eliminating the need for expensive panel upgrades or newer GHB3100 retrofits. Rated for 600VAC with an 18kAIC capacity at 240V, it features HACR certification and reverse feed capabilities.Specifications
| Brand | Eaton / Westinghouse |
|---|---|
| Part Number | G3100-R |
| Series | G |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 18kA @ 240VAC, 14kA @ 480VAC, 10kA @ 600VAC, 14kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Westinghouse Panelboards, Motor Control Centers |
| Wire Gauge | 10-1/0 AWG |
| Max Wire | 1/0 AWG |
| Min Wire | 10 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Shunt Trip, Auxiliary Switch, Undervoltage Release, Alarm Switch |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, NEMA AB-1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40°C |
| Construction Features | HACR Rated, Reverse Feed |
Product FAQs
8 answersWhat equipment is the G3100 circuit breaker compatible with?
The G3100 is designed for installation in legacy Westinghouse and Cutler-Hammer panelboards, as well as motor control centers that accept G-frame bolt-on breakers.
Are Eaton and Westinghouse G3100 breakers interchangeable?
Yes. Eaton acquired the Westinghouse distribution equipment division, so the G3100 may be branded as Eaton, Cutler-Hammer, or Westinghouse. They are physically and electrically identical.
What wire sizes are compatible with the G3100 lugs?
The load-side lugs on the G3100 accept wire sizes ranging from 10 AWG up to 1/0 AWG.
Does the G3100 include lugs on both the line and load sides?
No. As a bolt-on breaker, the line side bolts directly to the panelboard bus. It comes equipped with load-side lug terminals for outgoing wire connections.
Can the G3100 be used in DC electrical systems?
Yes, this breaker is rated for DC applications up to 250VDC, providing a maximum interrupting capacity of 14kA at that voltage.
Are the trip settings on the G3100 adjustable?
No, the G3100 features a fixed thermal and fixed magnetic trip unit. The long-time and instantaneous trip thresholds cannot be adjusted in the field.
Is the G3100 a direct replacement for older Westinghouse G-frame breakers?
Yes, the G3100 serves as an exact drop-in replacement for legacy Westinghouse and Cutler-Hammer 100A, 3-pole G-frame breakers, allowing you to replace the breaker without modifying the panelboard.
Is the G3100 suitable for reverse feed applications?
Yes, the G3100 is capable of being reverse fed, which provides flexibility for specific panelboard or motor control center configurations.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 4 reviews.
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4 reviews
- TFThomas F.Verified BuyerRated 5 out of 5 stars10/6/25Quick shipping
They got me what I needed on time—-perfect transaction
- BJBrandon J.ReviewingEaton HLK6 Padlock DeviceI recommend this productRated 5 out of 5 stars1/23/23item correct - shipped fast
got the order in 15 minutes before their next day cut off. it arrived early the next morning. cant ask for much more.
- AFAndrew F.ReviewingEaton/Cutler-Hammer TA1000NB1 Lug KitI recommend this productRated 5 out of 5 stars9/7/21great Service
great service and assistance, had my parts overnight
- KPKen P.Rated 5 out of 5 stars1/17/18great service
product received as promised. good pricing