Eaton / Cutler-HammerGHB3100S1
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Eaton / Cutler-Hammer GHB3100 Molded Case Circuit Breaker
- 100A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
GHB3100
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
GHB3100
Quantity
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Eaton / Cutler-Hammer GHB3100 - 100A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Quantity
Eaton / Cutler-Hammer GHB3100 - 100A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | GHB3100 |
| Series | GHB |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 125/250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 14kA @ 480Y/277VAC, 14kA @ 125/250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Pow-R-Line Panelboards, Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 10-1/0 AWG (Cu/Al) |
| 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, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, Federal Specification W-C-375B, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip, Quick-Make/Quick-Break, Trip-Free Mechanism |
Quantity
Eaton / Cutler-Hammer GHB3100 - 100A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | GHB3100-R |
| Series | GHB |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 125/250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 14kA @ 480Y/277VAC, 14kA @ 125/250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Pow-R-Line Panelboards, Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 10-1/0 AWG (Cu/Al) |
| 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, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, Federal Specification W-C-375B, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip, Quick-Make/Quick-Break, Trip-Free Mechanism |
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Description
Belonging to the Series C G-Frame family, the Eaton GHB3100 is a 3-pole, 100A MCCB for commercial electrical systems. It delivers consistent thermal-magnetic protection for demanding environments. This bolt-on breaker installs into Eaton Pow-R-Line panelboards and motor control centers. It accepts 10-1/0 AWG wire and features a non-interchangeable trip unit with quick-make, quick-break mechanisms. Rated 14 kAIC at 480Y/277VAC, the unit is HACR rated and suitable for reverse feed applications.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | GHB3100-R |
| Series | GHB |
| Amperage | 100A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480Y/277VAC, 125/250VDC |
| Phase | 3 |
| AIC Rating | 65kA @ 240VAC, 14kA @ 480Y/277VAC, 14kA @ 125/250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Eaton Pow-R-Line Panelboards, Eaton Series C Panelboards, Switchboards, Motor Control Centers |
| Wire Gauge | 10-1/0 AWG (Cu/Al) |
| 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, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, Federal Specification W-C-375B, NEMA AB 1, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Reverse Feed, Non-Interchangeable Trip, Quick-Make/Quick-Break, Trip-Free Mechanism |
Product FAQs
7 answersIs the Eaton GHB3100 suitable for a 480V 3-phase ungrounded delta system?
No. The 480Y/277VAC rating restricts this breaker to solidly grounded wye systems where the line-to-ground voltage does not exceed 277V. It must not be installed on 480V ungrounded or corner-grounded delta systems.
Which panelboards are compatible with the GHB3100 circuit breaker?
This bolt-on breaker is designed for Eaton and Cutler-Hammer Pow-R-Line series panelboards, including the PRL1a, PRL2a, and PRL3a chassis. It is also compatible with legacy Series C panelboards, switchboards, and motor control centers.
Can I use this breaker to replace an older Westinghouse or Cutler-Hammer GHB3100?
Yes. Eaton acquired Cutler-Hammer and the legacy Westinghouse distribution equipment lines. The modern Eaton GHB3100 is the exact, direct replacement for those older branded breakers with the same catalog number.
What is the terminal torque specification for the GHB3100?
Torque requirements depend on the wire gauge being terminated. According to Eaton specifications for G-frame breakers, 14 to 10 AWG wire requires 20 lb-in, 8 AWG requires 40 lb-in, and 6 to 1/0 AWG requires 45 lb-in. Always verify the exact torque values printed on the breaker nameplate before final installation.
Are the line and load terminals on the GHB3100 field-replaceable?
No. Unlike larger Eaton Series C frame breakers, the aluminum pressure lugs on G-frame GHB breakers are factory-installed and cannot be swapped, removed, or replaced in the field.
Can I adjust the trip settings on this 100A breaker?
No. The GHB3100 features a non-interchangeable trip unit with fixed thermal (long-time) and fixed magnetic (instantaneous) overcurrent protection.
Does the GHB3100 support standard DIN rail mounting?
No. This is a bolt-on circuit breaker specifically engineered to bolt directly to the busbars of compatible Eaton and Cutler-Hammer equipment. It cannot be mounted onto a DIN rail.
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Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
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Reviews
Review summary
Customers rate this product 4.8 out of 5 based on 30 reviews.
Reviews Summary
Generated by AI from 30 most recent customer reviews
Last updated 9/20/26
Customers say these breakers function reliably and arrive quickly with proper packaging. The ordering process is straightforward, and products consistently match descriptions. Many reviews highlight fast shipping, competitive pricing, and availability. Users appreciate the condition of refurbished units and easy online ordering. One customer reported receiving an incorrect amperage breaker despite paying for expedited delivery. Another noted disappointment when duplicate orders were not consolidated to reduce freight costs. Overall, customers value the quick procurement and dependable product quality.
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Rating
30 reviews
- TGTimothy G.Verified BuyerReviewingEaton / Cutler-Hammer GHB3020 - 20A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/17/26Used model
Breaker ohm tested out fine and currently working on load test with a longer term battery charger. So far so good. Packaged very well no visible damages during shipping. Even received a follow up call from customer that I missed.
- CKChristopher K.Verified BuyerReviewingEaton / Cutler-Hammer GHB3030 - 30A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/16/26Great and easy support
Easy ordering process, and always helpful over support
- DMDustin M.Verified BuyerReviewingEaton / Cutler-Hammer GHB3030 - 30A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/31/26Great Price and Worked as Expected
Bought the renewed breaker and all works as expected and saved us money. Great price and availability. Thank you.
- MWMARK W.Verified BuyerReviewingEaton / Cutler-Hammer GHB1020 - 20A 1 Pole Molded Case Circuit BreakerRated 3 out of 5 stars7/21/26Good Product, but Disappointed With the Service
Good product, but I was disappointed with the service. I accidentally placed two separate orders and ended up paying freight on both. I had requested that they combine the orders, and had that been done with the freight waived, it would have saved me money.
Other than that, everything was good. I’m just disappointed that no one communicated this to me.
- AWAnthony W.Verified BuyerReviewingEaton / Cutler-Hammer GHB3080 - 80A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/7/26Breaker
Item came quick and as described. Simple and easy process!