ABB / General ElectricTHQB2150ST1
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ABB / General Electric THQB2150 Miniature Circuit Breaker
- 50A
- 2 Pole
- Bolt-On
ABB / General Electric
THQB2150
Miniature Circuit Breaker
Brand
ABB / General Electric
SKU
THQB2150
Quantity
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ABB / General Electric THQB2150 - 50A 2 Pole Miniature Circuit Breaker
New
Quantity
Quantity
ABB / General Electric THQB2150 - 50A 2 Pole Miniature Circuit Breaker
New
Quantity
| Brand | ABB / General Electric |
|---|---|
| Part Number | THQB2150 |
| Series | THQB |
| Amperage | 50A |
| 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 | 8-3 AWG (Cu/Al) |
| Max Wire | 3 AWG |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Internal Common Trip, Quick-Make/Quick-Break |
Sold out
Quantity
ABB / General Electric THQB2150 - 50A 2 Pole Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | ABB / General Electric |
|---|---|
| Part Number | THQB2150-R |
| Series | THQB |
| Amperage | 50A |
| 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 | 8-3 AWG (Cu/Al) |
| Max Wire | 3 AWG |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Internal Common Trip, Quick-Make/Quick-Break |
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Description
Engineered for heavy-duty commercial and industrial applications, this 50-amp miniature breaker provides dependable thermal-magnetic protection. It mounts into GE A-Series panelboards and AQ lighting panels, utilizing a bolt-on design for maximum stability in high-vibration environments. The two-pole configuration includes quick-make/quick-break mechanisms to extend contact life. Rated at 10kAIC for 120/240VAC systems, the unit is also HACR certified for HVAC motor loads.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | THQB2150 |
| Series | THQB |
| Amperage | 50A |
| 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 | 8-3 AWG (Cu/Al) |
| Max Wire | 3 AWG |
| Min Wire | 8 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Load Side Lugs Included |
| Standards | CSA C22.2 No. 5, HACR, UL 489 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Internal Common Trip, Quick-Make/Quick-Break |
Product FAQs
8 answersWhat panels are compatible with the THQB2150 circuit breaker?
This breaker is designed for use in standard GE A-Series panelboards and GE AQ lighting panels that require a bolt-on connection. It mounts directly to the panel bus.
What is the difference between a GE THQB and THQL breaker?
The THQB2150 is a bolt-on circuit breaker intended for commercial panels like the AQ lighting panel line. THQL breakers are plug-in style breakers typically used in residential PowerMark load centers. They are not interchangeable.
Why is the THQB2150 listed under both ABB and General Electric?
ABB acquired GE Industrial Solutions. Depending on the manufacturing date, new stock of this circuit breaker may carry GE branding, ABB branding, or a combination of both. The fit and function remain identical.
Is the THQB2150 HACR rated?
Yes, this breaker carries an HACR rating, making it suitable for use with heating, air conditioning, and refrigeration equipment motor loads.
Can I replace a THHQB2150 with a standard THQB2150?
The THHQB2150 is the 22kAIC version of this breaker. The THQB2150 is only rated for 10kAIC. You cannot replace a THHQB with a THQB unless the panel and circuit strictly require a 10kAIC maximum interrupt rating.
Can the THQB2150 be used for reverse feed applications?
Yes, standard GE Q-Line miniature breakers like the THQB series are suitable for reverse feed applications. They can be back-fed when installed according to local electrical codes.
What do the LI trip functions indicate on the THQB2150?
The LI designation means this thermal magnetic breaker provides Long-Time overload and Instantaneous short circuit protection. These standard trip settings are fixed and non-adjustable.
What wire sizes and materials are supported by the THQB2150 box lugs?
The factory box lugs accept conductors from 8 AWG up to 3 AWG. The terminals are dual-rated for both copper and aluminum wiring.
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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.