ABB / General ElectricTHQB2120GF
Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
Free Shipping Over $99
ABB / General Electric THQB2120GFT GFCI Miniature Circuit Breaker
- 20A
- 2 Pole
- Bolt-On
ABB / General Electric
THQB2120GFT
GFCI Miniature Circuit Breaker
Brand
ABB / General Electric
SKU
THQB2120GFT
Quantity
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ABB / General Electric THQB2120GFT - 20A GFCI Miniature Circuit Breaker
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Description
Rated 10 kAIC at 120/240V, this two-pole GFCI breaker delivers continuous ground fault monitoring for commercial and industrial applications. It installs into GE A-Series panelboards using a secure bolt-on connection, ensuring reliable power distribution in demanding environments. The integrated self-test feature automatically verifies the protection circuit, meeting updated NEC requirements for wet or damp locations while replacing the older THQB2120GF model.Specifications
| Brand | ABB / General Electric |
|---|---|
| Series | THQB |
| Amperage | 20A |
| 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 | 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 | LIG |
| Trip Function | Long-Time, Instantaneous, Ground Fault |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Special Classification | GFCI |
|---|---|
| Available Options | Padlock Attachment, Handle Lock |
| Accessories | Self-Test Feature (Integrated) |
| Standards | CSA C22.2 No. 5, UL 489, UL 943, NEMA AB 1 |
| Approval | CSA, HACR, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip, Quick-Make/Quick-Break, Self-Test |
Product FAQs
5 answersWhat panelboards are compatible with the THQB2120GFT breaker?
This bolt-on circuit breaker is designed exclusively for installation in GE A-Series panelboards and AQ lighting panels. It cannot be used in residential load centers and is not interchangeable with plug-in THQL or THQP style breakers.
What level of ground fault protection does the THQB2120GFT provide?
It provides Class A ground fault protection with a 5mA trip threshold. This is specifically designed for personnel protection to prevent severe electric shock in commercial kitchens, bathrooms, and damp outdoor environments.
How is the neutral connection wired on this GFCI breaker?
The THQB2120GFT features a standard pigtail neutral wire. During installation, this curled white wire must be connected directly to the neutral bus bar in the panelboard to power the internal ground fault sensing circuitry.
What is the difference between the THQB2120GFT and THQB2120GFT2?
The THQB2120GFT2 is the direct manufacturer successor to the THQB2120GFT. It retains the exact same bolt-on mounting, trip ratings, and physical footprint, but adds updated electronics that include an automatic self-test function and LED trip indication.
Can I substitute a THQL2120GFT for this THQB2120GFT breaker?
No. While both models provide identical GFCI protection, the THQL version features a plug-in connection designed for standard residential load centers. The THQB2120GFT utilizes a bolt-on connection required for commercial A-Series panels.
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Shipping
Free Shipping Policy
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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We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
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Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
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All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.
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.