ABB / General ElectricTHQB1120ST1
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ABB / General Electric THQB1115ST1 Miniature Circuit Breaker
- 15A
- 1 Pole
- Bolt-On
ABB / General Electric
THQB1115ST1
Miniature Circuit Breaker
Brand
ABB / General Electric
SKU
THQB1115ST1
Quantity
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ABB / General Electric THQB1115ST1 - 15A 1 Pole Miniature Circuit Breaker
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Description
Part of the Q-Line family, the GE THQB1115ST1 is a 1-pole, 15A breaker featuring a factory-installed 120VAC shunt trip for remote shutdown capabilities. The bolt-on design mounts into GE A-Series panelboards and AQ lighting panels. It utilizes standard box lugs accepting 14-8 AWG copper or 12-8 AWG aluminum wire. Delivering 10kAIC at 120/240VAC, the breaker uses thermal-magnetic trip technology. It includes a trip-free mechanism and is SWD-rated for fluorescent lighting.Specifications
| Brand | ABB / General Electric |
|---|---|
| Series | THQB |
| Amperage | 15A |
| Poles | 1 |
| 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 | 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 |
| Available Options | Auxiliary Switch, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip |
| Standards | CSA C22.2 No. 5, NEMA AB 1, UL 489 |
| Approval | CSA, HACR, SWD, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, SWD Rated, Quick-Make/Quick-Break, Trip-Free Mechanism |
Product FAQs
7 answersWhat does the ST1 suffix indicate on the THQB1115ST1?
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 shutdown or automated control systems.
Which panelboards are compatible with this bolt-on breaker?
This unit is designed for use in GE A-Series panelboards and GE AQ lighting panels. It requires a bolt-on connection to the panel bus and cannot be used in plug-on load centers.
What are the acceptable wire sizes for the box lugs on this breaker?
The terminals accept 14 to 8 AWG copper wire or 12 to 8 AWG aluminum wire. Ensure proper torque specifications are followed during installation to maintain a secure connection.
How is the shunt trip wired for remote operation?
The factory-installed shunt trip includes external pigtail leads that must be connected to a 120VAC control circuit. When voltage is applied to these leads, the internal coil energizes and mechanically trips the breaker.
Is the THQB1115ST1 rated for switching duty and HVAC applications?
Yes, this 15A breaker is SWD rated for switching 120VAC fluorescent lighting loads. It is also HACR rated for use with heating, air conditioning, and refrigeration equipment.
Does this breaker require a separate control power source for the shunt trip?
Yes, the factory-installed shunt trip requires an external 120VAC control voltage source to actuate the trip coil. It does not draw control power from the breaker's primary load circuit.
Can I use this bolt-on breaker in a standard GE PowerMark Gold load center?
No, this THQB series breaker features a bolt-on connection designed for commercial panelboards. Standard GE PowerMark Gold residential load centers require plug-in THQL series breakers.
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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.