ABB / General ElectricTHQB21100ST1
Free Shipping Over $99
ABB / General Electric THQB2190ST1 Miniature Circuit Breaker
- 90A
- 2 Pole
- Bolt-On
ABB / General Electric
THQB2190ST1
Miniature Circuit Breaker
Brand
ABB / General Electric
SKU
THQB2190ST1
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
ABB / General Electric THQB2190ST1 - 90A 2 Pole Miniature Circuit Breaker
New
Quantity
Similar Items
ABB / General ElectricTHQB2180ST1
80A 2 Pole Miniature Circuit Breaker
ABB / General ElectricTHQB2160ST1
60A 2 Pole Miniature Circuit Breaker
ABB / General ElectricTHQB2150ST1
50A 2 Pole Miniature Circuit Breaker
Description
Engineered for commercial and industrial applications, this 90-amp bolt-on component provides reliable thermal-magnetic protection. The factory-installed 120VAC shunt trip mechanism enables remote opening of the circuit for enhanced facility control and safety protocols. It installs into GE A-Series panelboards and AQ lighting panels using standard box lug terminals. The unit accommodates 6-1/0 AWG copper or 4-1/0 AWG aluminum wire. Rated for 10kAIC at 120/240VAC, it includes an HACR rating.Specifications
| Brand | ABB / General Electric |
|---|---|
| Series | THQB |
| Amperage | 90A |
| 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 AQ Lighting Panels, GE A-Series Panelboards |
| 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 (Factory Installed), Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, UL 489, NEMA AB 1 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Internal Common Trip, Quick-Make/Quick-Break |
Product FAQs
7 answersWhich panelboards are compatible with the THQB2190ST1 circuit breaker?
This bolt-on breaker is designed specifically for installation in GE AQ Lighting Panels and GE A-Series Panelboards. It is not compatible with standard plug-in load centers.
What does the ST1 suffix indicate on the THQB2190ST1?
The ST1 suffix designates a factory-installed 120VAC shunt trip mechanism. This allows the breaker to be tripped remotely via an external control signal, which is commonly used for emergency shutdowns or automated safety protocols.
What wire sizes are accepted by the box lugs on this 90A breaker?
The terminals accommodate 6 to 1/0 AWG copper conductors or 4 to 1/0 AWG aluminum conductors. Ensure proper torque specifications are followed during installation.
Is the THQB2190ST1 manufactured by GE or ABB?
ABB acquired GE Industrial Solutions in 2018. The Q-Line series continues production under the exact same catalog numbers, meaning a THQB2190ST1 is identical and fully interchangeable whether the label reads GE, ABB, or GE by ABB.
Can I use the THQB2190ST1 if my panel requires a 22kAIC rating?
No, the THQB2190ST1 is rated for a maximum of 10kAIC at 120/240VAC. If your system requires a 22kAIC interrupting capacity, you will need to source the THHQB equivalent.
Does the THQB2190ST1 provide ground fault or arc fault protection?
No, this model features standard thermal-magnetic protection with Long-Time and Instantaneous (LI) trip functions. It does not include GFI, GFEP, or AFCI protection.
How does the bolt-on connection of the THQB2190ST1 differ from plug-in models?
Bolt-on breakers like the THQB series secure directly to the panel bus with screws, providing a rigid, vibration-resistant connection typical in commercial and industrial environments. Plug-in models (THQL) are not interchangeable with bolt-on panels.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
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.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
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.
Search
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.