ABB / General Electric THQC2120GFT GFCI Molded Case Circuit Breaker
- 20A
- 2 Pole
- DIN Rail
Quantity
ABB / General Electric THQC2120GFT - 20A GFCI Molded Case Circuit Breaker
New
Quantity
Description
Engineered for demanding environments, this 20-amp device supplies 5mA ground-fault monitoring for commercial facilities. It helps contractors meet strict NEC codes for areas prone to moisture. The compact Q-Line footprint fastens onto standard DIN rail configurations within OEM equipment. It serves as an upgraded replacement for the legacy THQC2120GF model. Advanced self-testing circuitry periodically checks protection status without manual intervention. It includes a pigtail neutral wire.Specifications
| Brand | ABB / General Electric |
|---|---|
| Series | THQC |
| Amperage | 20A |
| Poles | 2 |
| Mounting Style | DIN Rail |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120/240VAC |
| Frame Type | THQC |
|---|---|
| Terminal Type | Lugs |
| For Use With | DIN Rail Systems, OEM Panels, Enclosures |
| 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 | Padlock Attachment |
| Accessories | Load Side Lugs Included, Pigtail Neutral |
| Standards | HACR, UL 489, UL 943 |
| Approval | CSA, UL |
| Temp Rating | 10C to 50C |
| Construction Features | HACR Rated, Common Trip, Quick-Make/Quick-Break, Visual Trip Indicator, Self-Test |
| Special Features | Self-Test |
Product FAQs
7 answersIs the ABB THQC2120GFT identical to the GE THQC2120GFT?
Yes. Following ABB's acquisition of GE Industrial Solutions, the THQC series remains in production under the ABB brand. The breakers retain the exact same physical dimensions, electrical characteristics, and catalog numbers as the legacy GE versions.
What is the ground fault trip sensitivity of this breaker?
The THQC2120GFT provides Class A ground fault protection with a 5mA trip threshold. This sensitivity level is required for personnel protection in locations where water and electricity may come into contact.
How is the THQC2120GFT mounted within an enclosure?
Unlike plug-in residential breakers, the THQC series utilizes a feed-thru lug design. It is typically mounted onto standard 35mm DIN rail systems or secured to a backplate using dedicated mounting hardware within OEM panels and control enclosures.
How do I wire the neutral connection for the ground fault circuitry?
This breaker is equipped with a factory-installed pigtail neutral wire. To ensure the internal ground fault monitoring functions correctly, the pigtail must be routed and terminated directly to the neutral bus bar of the panel or enclosure.
What does the T suffix in the THQC2120GFT part number signify?
The T indicates that the breaker includes an automatic self-test function. The internal circuitry periodically runs diagnostic checks to verify that the ground fault protection remains fully operational, complying with modern NEC safety standards.
Can a THQC2120GFT be used as a direct replacement for a THQL2120GFT?
No. Although both are 20A, 2-pole GFCI breakers from the Q-Line family, they feature different mounting mechanisms. The THQC is a lug-to-lug breaker for DIN rail or base mounting, while the THQL is a plug-in breaker designed exclusively for GE load centers.
Are the thermal and magnetic trip settings adjustable on this model?
No. The THQC2120GFT features a fixed thermal-magnetic trip unit. The long-time delay for overload protection and the instantaneous magnetic trip for short circuits are factory calibrated and cannot be modified in the field.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 42 reviews.
- POPaul O.Verified BuyerReviewingABB / General Electric THQC2150 - 50A 2 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars9/3/26Recent Breaker Purchases
These breakers matched perfectly for my main AC supplies for my boat. I had the original 43-year-old Chinese (GenFu) breakers that failed and these GEs were a perfect match. My only reservation for not providing a 5-star review is breakers do not arrive in GE's original packaging which can lead to questions whether they are truly "new" breakers. Otherewise, happy I found some that replaced my originals. Thanks SB!
- AAAlfredo A.Verified BuyerReviewingABB / General Electric THQC2150 - 50A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars8/26/26Replacement of disconnect switches
Good product and price
- JSJoe S.Verified BuyerReviewingABB / General Electric THQC32015WL - 15A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars5/22/26THQC tough to find…
Works as should
- MPMike P.Verified BuyerReviewingABB / General Electric THQC2150 - 50A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars4/6/26Everything worked out just fine. I would recommend it again.
Considering how old the panel was the breaker worked out just fine. Were you again?
- QPQuang P.Verified BuyerReviewingABB / General Electric THQC2130 - 30A 2 Pole Molded Case Circuit BreakerI recommend this productRated 4 out of 5 stars2/10/26Fast Shipping & Quality Service
Great experience with SuperBreakers! The GE THQL 60A and 30A breakers arrived with fast shipping and professional packaging. The free shipping was a huge bonus. My HVAC is back up and running—excellent service!