ABB / General ElectricTHQB2150
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ABB / General Electric THQB2145 Miniature Circuit Breaker
- 45A
- 2 Pole
- Bolt-On
ABB / General Electric
THQB2145
Miniature Circuit Breaker
Brand
ABB / General Electric
SKU
THQB2145
Quantity
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ABB / General Electric THQB2145 - 45A 2 Pole Miniature Circuit Breaker
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Description
Part of the Q-Line family, this 45-amp miniature breaker delivers robust overcurrent protection for residential, commercial, and industrial electrical systems. Fastening into GE A-Series panelboards guarantees a rigid mechanical and electrical connection that withstands vibration. The two-pole unit features an internal common trip mechanism and quick-make/quick-break contacts. It carries a 10kAIC rating at 120/240VAC and is HACR rated for use with heating and air conditioning equipment.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | THQB2145 |
| Series | THQB |
| Amperage | 45A |
| 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 |
| 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 Thermal, Fixed Magnetic |
| 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, Non-Interchangeable Trip, Visual Trip Indicator, Reverse Feed |
Product FAQs
7 answersWhat panelboards are compatible with the THQB2145?
The THQB2145 is designed for use in GE A-Series panelboards and AQ lighting panels. It is a bolt-on breaker and will not fit residential PowerMark load centers that require plug-in breakers.
What is the difference between GE THQB and THQL circuit breakers?
THQB breakers feature a bolt-on connection for commercial panelboards, while THQL breakers use a plug-in connection for residential load centers. Despite having similar electrical ratings, they mount differently and cannot be interchanged.
Are ABB and General Electric THQB breakers identical?
Yes. Following ABB acquiring GE Industrial Solutions, the THQB product line remained the same. Breakers labeled under ABB, GE, or both brands are identical in fit, form, and function.
What are the lug torque specifications for the THQB2145?
The required torque depends on the wire size used. Torque 8 AWG wire to 40 in-lb, 6 AWG to 4 AWG wire to 45 in-lb, and 3 AWG wire to 50 in-lb.
How is the THQB2145 installed in a panel?
This breaker bolts directly to the panelboard busbar using mounting screws. This bolt-on design provides a secure, vibration-resistant connection required in many commercial and industrial environments.
What does the Q-Line family designation indicate?
Q-Line is the standard General Electric miniature circuit breaker platform featuring a 1-inch width per pole. As a 2-pole breaker, the THQB2145 occupies 2 inches of space on the panel bus.
Is the THQB2145 HACR rated?
Yes, this breaker is HACR rated. It is approved for use with heating, air conditioning, and refrigeration equipment that requires a breaker with this specific safety listing.
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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.