ABB / General ElectricTHQB2150GFT2
ABB / General Electric THQB2145GFT2 GFCI Miniature Circuit Breaker
- 45A
- 2 Pole
- Bolt-On
ABB / General Electric
THQB2145GFT2
GFCI Miniature Circuit Breaker
Brand
ABB / General Electric
SKU
THQB2145GFT2
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ABB / General Electric THQB2145GFT2 - 45A GFCI Miniature Circuit Breaker
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Description
Engineered for commercial and industrial applications, the GE THQB2145GFT2 delivers 5mA Class A ground fault protection. This 2-pole, 45A miniature circuit breaker features a self-test module to ensure continuous safety compliance. It mounts into GE A-Series panelboards and AQ lighting panels using a secure bolt-on connection. The unit accepts 8-3 AWG copper or aluminum wire via box lug terminals. With a 10kAIC rating at 120/240VAC, this Q-Line breaker utilizes thermal-magnetic trip technology.Specifications
| Brand | ABB / General Electric |
|---|---|
| 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, 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 | LIG |
| Trip Function | Long-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Fixed |
| Special Classification | GFCI |
|---|---|
| Available Options | Shunt Trip, Auxiliary Switch, Alarm Switch, Undervoltage Release, Padlock Attachment |
| Accessories | Self-Test Feature |
| Standards | CSA C22.2 No. 5, HACR, UL 489, UL 943 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Internal Common Trip, Non-Interchangeable Trip, Quick-Make/Quick-Break, Self-Test |
Product FAQs
7 answersWhich panelboards are compatible with the THQB2145GFT2?
This bolt-on breaker is designed for use in GE A-Series panelboards and GE AQ or ReliaGear lighting panels. It will not fit in standard residential load centers that require plug-on breakers.
Can I use the THQB2145GFT2 to replace a THQL breaker?
No. The THQB series features a bolt-on connection, whereas THQL breakers use a plug-on connection. They are not interchangeable.
Does this breaker require a dedicated neutral connection?
Yes. As a GFCI breaker, it includes a pigtail neutral wire that must be connected to the neutral bus bar in the panel for the ground fault circuitry to function correctly.
What wire sizes are accepted by the box lugs on this breaker?
The terminals are designed to accept copper or aluminum conductors ranging from 8 AWG to 3 AWG.
What level of ground fault protection does the THQB2145GFT2 provide?
The GFT2 suffix indicates it provides Class A personnel protection, tripping at a 5mA ground fault threshold. This differs from GFEP models, which provide 30mA equipment protection.
How does the internal common trip function work on this 2-pole breaker?
The internal common trip mechanism ensures that if one pole experiences an overload, short circuit, or ground fault, both poles will disconnect simultaneously to prevent single phasing.
How do I test the ground fault functionality after installation?
Once installed and energized, press the integrated test button on the front of the breaker. The breaker should trip immediately, confirming the ground fault circuitry is operating correctly.
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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 111 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
111 reviews
- DWDouglas W.Verified BuyerReviewingABB / General Electric THQB1120 - 20A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars10/5/26Ge breaker
Exactly what I needed and fast fast delivery
- 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