ABB / General ElectricTHQB32080ST1
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ABB / General Electric THQB32070ST1 Miniature Circuit Breaker
- 70A
- 3 Pole
- Bolt-On
ABB / General Electric
THQB32070ST1
Miniature Circuit Breaker
Brand
ABB / General Electric
SKU
THQB32070ST1
Quantity
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ABB / General Electric THQB32070ST1 - 70A 3 Pole Miniature Circuit Breaker
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Description
Built to accommodate higher current demands in commercial facilities, this 70A thermal-magnetic breaker features an integrated shunt trip for remote actuation. It connects securely into GE A-Series panelboards and AQ lighting enclosures via standard bolt-on terminals. With a 10kAIC rating at 240VAC, the three-pole device provides dependable short-circuit and overload defense while supporting emergency power-off systems through its factory-installed auxiliary tripping mechanism.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | THQB32070ST1 |
| Series | THQB |
| Amperage | 70A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 120/240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC, 10kA @ 120/240VAC |
| Frame Type | THQB |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | GE A-Series Panelboards, GE AQ Lighting Panels |
| Wire Gauge | 6-1/0 AWG (Cu), 4-1/0 AWG (Al) |
| Max Wire | 1/0 AWG |
| Min Wire | 6 AWG (Cu), 4 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip (Factory Installed), Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR Rated, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip, Non-Interchangeable Trip, Quick-Make/Quick-Break |
Product FAQs
9 answersWhich panelboards are compatible with the THQB32070ST1 circuit breaker?
This bolt-on breaker is designed for use in GE A-Series panelboards and GE AQ lighting panels.
What does the ST1 suffix indicate on the THQB32070ST1?
The ST1 suffix indicates that this breaker includes a factory-installed 120VAC shunt trip accessory. This allows for remote tripping of the breaker via an external control signal.
What wire sizes are accepted by the box lugs on this 70A breaker?
The terminals accept 6 to 1/0 AWG copper wire or 4 to 1/0 AWG aluminum wire.
Is this 70A THQB breaker rated for HVAC equipment?
Yes, it is HACR rated, making it suitable for use with heating, air conditioning, and refrigeration equipment that requires a 70A overcurrent protection device.
How does the THQB32070ST1 mount into the panelboard?
It features a bolt-on connection type, meaning it securely bolts directly to the bus connections in compatible GE load centers and lighting panels.
Will I receive an ABB or GE branded breaker when ordering the THQB32070ST1?
Because ABB acquired GE Industrial Solutions, you may receive a breaker branded as either ABB or GE. The form, fit, and function remain identical regardless of the label.
What type of trip mechanism does the THQB32070ST1 utilize?
It uses a fixed thermal-magnetic trip unit with Long-Time and Instantaneous (LI) functions to protect against both prolonged overloads and sudden short circuits.
Can I field-install a shunt trip on a standard THQB breaker instead of buying the ST1 version?
No, the shunt trip mechanism on the THQB32070ST1 is factory-installed. Internal accessories for miniature Q-Line breakers cannot be added in the field.
Can the THQB32070ST1 be reverse fed?
Yes, this breaker is suitable for reverse feed applications, allowing it to be used as a main breaker or back-fed branch breaker where permitted by local electrical codes.
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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 4.9 out of 5 based on 110 reviews.
Reviews Summary
Generated by AI from 100 most recent customer reviews
Last updated 4/16/26
Customers say these circuit breakers arrive quickly and work as expected. Many reviews mention fast shipping, with some receiving orders overnight or within days. Users report the breakers fit properly, install easily, and function correctly in both residential and commercial applications. Common feedback includes competitive pricing and good packaging that protects products during shipping. While most praise the ordering process as straightforward, some note occasional issues with missing installation screws or receiving updated product versions instead of pictured models. Several contractors and electricians appreciate having access to hard-to-find or obsolete breakers when local suppliers lack inventory.
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Rating
110 reviews
- SPSarah P.Verified BuyerReviewingABB / General Electric THQB1120 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/15/26Exactly as Described
These are so hard to find at a good price. Will be ordering again.
- SBSeth B.Verified BuyerReviewingABB / General Electric THQB1120 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/8/26Hard to find older style breakers
I am pleased to have access to these breakers. We have a number of them at our church. Local suppliers said that they had never seen this kind of breaker. They fit our panel perfectly.
- TZThomas Z.Verified BuyerReviewingABB / General Electric THQB32040 - 40A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/30/26Great company
This company is awesome. Every time I call them and I need help with something. They’re right there to help me. They’re also very knowledgeable. They go out of their way to get you the product that you need right away and not a great price.
- TDTerry D.Verified BuyerReviewingABB / General Electric THQB2130GFT - 30A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/24/2630 AMP GFCI @ POLE
Breakers were new in box as advertised. Good turn around on orders Reasonable pricing much less than abb dealer
- LMLeslie M.Verified BuyerReviewingABB / General Electric THQB21100 - 100A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/16/26Perfect fit.
Always timely with delivery and a perfect.fit.