ABB / General Electric THHQB1120GFT GFCI Miniature Circuit Breaker
- 20A
- 1 Pole
- Bolt-On
Quantity
ABB / General Electric THHQB1120GFT - 20A GFCI Miniature Circuit Breaker
New
Quantity
Description
Rated at 22 kAIC, this 20A bolt-on GFCI breaker provides Class A 5mA ground-fault protection for commercial electrical systems. The GE THHQB1120GFT is part of the Q-Line family, engineered to safeguard personnel in wet or damp locations per NEC code. It installs into GE A-Series and ReliaGear panelboards, serving as an upgraded replacement for the THHQB1120GF. Featuring built-in self-test technology, it routinely verifies its protective functions and carries HACR and SWD ratings.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | THHQB1120GFT |
| Series | THHQB |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120VAC |
| Frame Type | THQB |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | GE A-Series Panelboards, ReliaGear 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 |
| Special Classification | GFCI |
|---|---|
| Available Options | Shunt Trip, Auxiliary Switch, Padlock Attachment |
| Accessories | Self-Test Feature |
| Standards | CSA C22.2 No. 5, UL 489, UL 943 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, SWD Rated, Quick-Make/Quick-Break, Non-Interchangeable Trip, Self-Test |
Product FAQs
6 answersCan the THHQB1120GFT be used in standard residential load centers?
No. This is a bolt-on circuit breaker designed specifically for commercial and industrial panelboards, such as GE A-Series and ReliaGear panels. Standard residential load centers typically require plug-in Q-Line breakers, such as the THQL or THHQL series.
Does the THHQB1120GFT replace older GE ground-fault breakers?
Yes, the THHQB1120GFT is the direct, self-testing replacement for the discontinued THHQB1120GF. The "GFT" designation indicates the addition of built-in self-test technology required by current UL 943 standards for GFCI devices.
Does this breaker require a neutral connection to function properly?
Yes, this GFCI breaker includes a pigtail neutral wire that must be connected directly to the panelboard neutral bus for the ground-fault protection circuitry to operate correctly.
What does the "LIG" trip function indicate on this breaker?
LIG stands for Long-Time, Instantaneous, and Ground-Fault. This means the breaker provides thermal overload protection (Long-Time), short-circuit protection (Instantaneous), and ground-fault circuit interruption (Ground-Fault).
How does the THHQB1120GFT differ from a standard THQB1120GFT breaker?
The "HH" in the THHQB prefix designates a high-interrupting rating. This breaker is rated for 22kAIC at 120VAC, whereas a standard THQB breaker is typically rated for a lower 10kAIC short-circuit capacity.
What is the purpose of the self-test feature on the THHQB1120GFT?
The self-test functionality automatically conducts routine internal tests to verify the ground-fault detection circuitry is working correctly. If the breaker fails the self-test, it will trip and deny power, indicating that the unit must be replaced.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 13 reviews.
- JLJames L. L.Verified BuyerReviewingABB / General Electric THHQB21100 - 100A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/6/26ABB / General Electric THHQB21100
Fast Service and delivery, The breaker was as described and brand new! Great pricing and great Service. I paid extra for UPS ground, it was delivered quickly.
- SNScott N.Verified BuyerReviewingABB / General Electric THHQB32030 - 30A 3 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars12/30/25Perfect
The correct breaker the first time - every time.
- AGAlejandra G.Verified BuyerReviewingABB / General Electric THHQB1140 - 40A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/4/25Everithing is good!
Everithing is good!
- LMLuis M.ReviewingABB / General Electric THHQB2145 - 45A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/19/23Good product and good service
Good product and good service
- SHScott H.ReviewingABB / General Electric THHQB2180 - 80A 2 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars6/21/2280amp commercial breaker
Great how easy it was to order and how fast I got it. I will order one again when needed