ABB / General Electric THQB2170ST1 Molded Case Circuit Breaker
- 70A
- 2 Pole
- Bolt-On
Quantity
ABB / General Electric THQB2170ST1 - 70A 2 Pole Molded Case Circuit Breaker
New
Quantity
Description
Part of the Q-Line family, the GE THQB2170ST1 is a 2-pole, 70-amp molded case circuit breaker designed for commercial electrical systems. It provides robust thermal-magnetic protection for branch circuits. This bolt-on breaker installs into GE A-Series panelboards and AQ lighting panels. It accepts 6-1/0 AWG copper or 4-1/0 AWG aluminum wire via standard box lug terminals. Rated for 10kAIC at 120/240VAC, this unit features a factory-installed shunt trip for remote disconnect capabilities.Specifications
| Brand | ABB / General Electric |
|---|---|
| Series | THQB |
| Amperage | 70A |
| Poles | 2 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 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, Undervoltage Release, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip |
| Standards | CSA C22.2 No. 5, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip, Quick-Make/Quick-Break, Non-Interchangeable Trip |
Product FAQs
6 answersWhat panelboards are compatible with the THQB2170ST1 circuit breaker?
This bolt-on breaker is designed specifically for commercial applications, installing directly into GE A-Series panelboards and GE AQ lighting panels.
What does the ST1 suffix mean in the THQB2170ST1 part number?
The ST1 suffix indicates that the breaker includes a factory-installed 120VAC shunt trip accessory. This feature allows the breaker to be tripped remotely via an external control signal for emergency shutdowns or automated control.
Can I use the THQB2170ST1 in a standard GE residential load center?
No. The THQB series features a bolt-on connection designed for commercial panels. Standard GE residential load centers require plug-on breakers, such as the THQL series.
Will my THQB2170ST1 breaker arrive branded as ABB or General Electric?
Following ABB's acquisition of GE Industrial Solutions, Q-Line breakers may feature either ABB or GE branding. The form, fit, function, and panel compatibility remain exactly the same regardless of the label.
How does the bolt-on connection of the THQB2170ST1 differ from plug-on breakers?
Bolt-on breakers like the THQB2170ST1 physically screw into the panel's bus bar. This creates a highly secure, vibration-resistant connection typically required in commercial and industrial environments, unlike plug-on breakers that simply snap into place.
Does the THQB2170ST1 include ground fault or arc fault protection?
No. This is a standard thermal-magnetic breaker providing long-time and instantaneous (LI) overcurrent protection. It does not include GFCI or AFCI capabilities.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 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.