Eaton / Cutler-HammerGHB3070S1
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Eaton / Cutler-Hammer GHB3070 Molded Case Circuit Breaker
- 70A
- 3 Pole
- Bolt-On
Eaton / Cutler-Hammer
GHB3070
Molded Case Circuit Breaker
Brand
Eaton / Cutler-Hammer
SKU
GHB3070
Quantity
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Eaton / Cutler-Hammer GHB3070 - 70A 3 Pole Molded Case Circuit Breaker
New
Quantity
Quantity
Eaton / Cutler-Hammer GHB3070 - 70A 3 Pole Molded Case Circuit Breaker
New
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | GHB3070 |
| Series | GHB |
| Amperage | 70A |
| 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 GHB3070 - 70A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | GHB3070-R |
| Series | GHB |
| Amperage | 70A |
| 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
Built to handle demanding commercial loads, this 70A molded case circuit breaker utilizes a quick-make, quick-break mechanism. The trip-free design ensures contacts open under fault conditions even if the handle is restricted. As part of the Series C G-Frame family, this unit mounts into Eaton Pow-R-Line panelboards, switchboards, and motor control centers. The bolt-on connection guarantees a secure fit. It delivers 14kAIC at 480Y/277VAC and supports reverse feed applications.Specifications
| Brand | Eaton / Cutler-Hammer |
|---|---|
| Part Number | GHB3070 |
| Series | GHB |
| Amperage | 70A |
| 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 answersWhich commercial panelboards accept the GHB3070 circuit breaker?
The GHB3070 is designed for Eaton and Cutler-Hammer Pow-R-Line panelboards, specifically systems like the PRL1a and PRL2a. It is also compatible with Eaton Series C panelboards, commercial switchboards, and motor control centers.
Can the GHB3070 be applied on a 480V 3-phase delta system?
No. Type GHB breakers have a slash voltage rating of 480Y/277V. This means they are exclusively UL listed for solid-grounded wye systems where the voltage to ground does not exceed 277V. They cannot safely interrupt faults on a 3-wire, ungrounded 480V delta system.
What are the terminal torque specifications for the GHB3070?
The factory pressure lugs accept 10 AWG to 1/0 AWG copper or aluminum conductors. Proper tightening torque varies by wire gauge: use 20 lb-in for 10 AWG, 35 lb-in for 8 AWG, 45 lb-in for 6 to 4 AWG, and 50 lb-in for 3 to 1/0 AWG.
How does the GHB3070 mount inside an enclosure?
This G-Frame breaker features a bolt-on mounting configuration. The line side physically bolts directly to the panelboard busbar using captive screws, while the load side relies on standard pressure lugs for field wire termination.
Is the GHB3070 HACR rated for HVAC equipment protection?
Yes. Current production Eaton Series C G-Frame breakers, including the 70A GHB3070, carry an HACR rating. This makes them fully compliant for use as branch circuit protection for heating, air conditioning, and refrigeration equipment.
Does the GHB3070 carry an SWD rating for lighting control?
No. Under UL 489 standards, only 15A and 20A single-pole GHB breakers carry an SWD (Switching Duty) rating. A 70A 3-pole breaker like the GHB3070 is not listed to be used as a regular switch for fluorescent lighting loads.
Is the Eaton GHB3070 a direct replacement for the Westinghouse GHB3070?
Yes. Following Eaton's acquisition of the Westinghouse distribution equipment division in 1994, the two product lines were merged. A modern Eaton or Cutler-Hammer GHB3070 is an exact, UL-listed drop-in replacement for older Westinghouse breakers bearing the same catalog number.
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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!