ABB / General ElectricTHQB1150
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ABB / General Electric THQB1145 Miniature Circuit Breaker
- 45A
- 1 Pole
- Bolt-On
ABB / General Electric
THQB1145
Miniature Circuit Breaker
Brand
ABB / General Electric
SKU
THQB1145
Quantity
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ABB / General Electric THQB1145 - 45A 1 Pole Miniature Circuit Breaker
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Description
Providing reliable thermal-magnetic protection, the GE THQB1145 is a 1-pole, 45A miniature breaker from the Q-Line family. It features a quick-make, quick-break mechanism for safe operation. This breaker bolts into GE A-Series panelboards and AQ lighting panels, and is suitable for reverse feed applications to offer flexibility in complex configurations. With a 10kAIC rating at 120/240VAC, it delivers dependable instantaneous protection. The unit is also HACR rated for HVAC equipment.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | THQB1145 |
| Series | THQB |
| Amperage | 45A |
| 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 | 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, 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, Quick-Make/Quick-Break, Non-Interchangeable Trip, Reverse Feed |
Product FAQs
6 answersWhat panelboards are compatible with the THQB1145 circuit breaker?
This bolt-on breaker is designed specifically for use in GE A-Series panelboards and GE AQ lighting panels. It is not compatible with standard residential plug-in load centers.
What is the difference between GE THQB and THQL circuit breakers?
THQB breakers feature a bolt-on mounting style intended for commercial panelboards. THQL breakers are plug-in devices designed for residential load centers. Because of the different mounting configurations, they are not interchangeable.
Can I use a THHQB breaker in place of a THQB1145?
Yes, THHQB breakers share the same physical dimensions and bolt-on mounting as THQB breakers but offer a higher interrupting rating of 22kAIC compared to the 10kAIC of the standard THQB line.
What are the recommended lug torque specifications for the THQB1145?
For the accepted 8-3 AWG wire range, the recommended torque is 40 in-lb for 8 AWG, 45 in-lb for 6-4 AWG, and 50 in-lb for 3 AWG conductors. Always verify with the manufacturer label on the breaker before finalizing the installation.
Is the THQB1145 circuit breaker HACR rated?
Yes, GE THQB series circuit breakers are HACR rated, making them suitable for use with heating, air conditioning, and refrigeration equipment that requires this specific designation.
Does the THQB1145 accept both copper and aluminum wiring?
Yes, the box lugs on this breaker are rated for both copper and aluminum conductors within the 8-3 AWG size range. When terminating aluminum wire, ensure a suitable anti-oxidant compound is applied to the stripped conductor.
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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.