ABB / General ElectricTHQB32030ST1
ABB / General Electric THQB32025ST1 Miniature Circuit Breaker
- 25A
- 3 Pole
- Bolt-On
ABB / General Electric
THQB32025ST1
Miniature Circuit Breaker
Brand
ABB / General Electric
SKU
THQB32025ST1
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
ABB / General Electric THQB32025ST1 - 25A 3 Pole Miniature Circuit Breaker
New
Quantity
Similar Items
ABB / General ElectricTHQB32020ST1
20A 3 Pole Miniature Circuit Breaker
ABB / General ElectricTHQB32035ST1
35A 3 Pole Miniature Circuit Breaker
ABB / General ElectricTHQB32040ST1
40A 3 Pole Miniature Circuit Breaker
Description
Part of the Q-Line family, this 25A miniature circuit breaker is engineered for commercial and industrial applications requiring remote shutdown capabilities. The three-pole device features a factory-installed 120VAC shunt trip mechanism for integrated control systems. It mounts securely into GE A-Series panelboards, AQ lighting panels, and ReliaGear RQ load centers via a standard bolt-on connection. Rated for 10kAIC at 240VAC, the unit utilizes fixed thermal-magnetic trip technology.Specifications
| Brand | ABB / General Electric |
|---|---|
| Series | THQB |
| Amperage | 25A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC |
| Phase | 3 |
| AIC Rating | 10kA @ 240VAC |
| Frame Type | THQB |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | GE A-Series Panelboards, GE AQ Lighting Panels, ReliaGear RQ Panelboards |
| Wire Gauge | 14-8 AWG (Cu), 12-8 AWG (Al) |
| Max Wire | 8 AWG |
| Min Wire | 14 AWG (Cu), 12 AWG (Al) |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Auxiliary Switch, Alarm Switch, Undervoltage Release |
|---|---|
| Accessories | Shunt Trip (120VAC) |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip, Quick-Make/Quick-Break, Non-Interchangeable Trip |
Product FAQs
6 answersWhich panelboards are compatible with the THQB32025ST1 circuit breaker?
This bolt-on breaker is designed for installation in GE A-Series Panelboards, GE AQ Lighting Panels, and ABB ReliaGear RQ Panelboards.
What does the ST1 suffix mean on this GE circuit breaker?
The ST1 suffix indicates the breaker includes a factory-installed 120V shunt trip. This allows the breaker to be tripped remotely by an external control signal, commonly used for emergency shutdown applications.
What wire gauges are supported by the terminals on this 25A breaker?
The box lugs accept 14 to 8 AWG copper conductors or 12 to 8 AWG aluminum conductors.
Can I substitute a THQL breaker for this THQB model?
No. THQB breakers feature a bolt-on connection for commercial panels, while THQL breakers use a plug-on mounting style. You must use the specific mounting type required by your panelboard bus.
Why is this breaker listed under both ABB and General Electric brands?
ABB acquired GE Industrial Solutions. Legacy GE Q-Line breakers are now manufactured under the ABB brand but remain fully backward compatible with existing GE panels.
Does this breaker provide ground fault or arc fault protection?
No. The THQB32025ST1 provides standard thermal-magnetic protection for overloads and short circuits. It does not include GFCI or AFCI protection, which would be indicated by suffixes like GFT or AF2.
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.