ABB / General Electric THHQC2120GFT GFCI Miniature Circuit Breaker
- 20A
- 2 Pole
- DIN Rail
Quantity
ABB / General Electric THHQC2120GFT - 20A GFCI Miniature Circuit Breaker
New
Quantity
Description
Designed for versatile installation, this 20-amp dual-pole unit provides reliable ground fault monitoring for industrial and commercial systems. It clips onto standard DIN rails or mounts within OEM enclosures, making it ideal for custom control panels. The integrated self-test function automatically verifies protection integrity, while the 22kAIC rating handles higher fault currents in demanding environments.Specifications
| Brand | ABB / General Electric |
|---|---|
| Series | THHQC |
| Amperage | 20A |
| Poles | 2 |
| Mounting Style | DIN Rail |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120/240VAC |
| Frame Type | THQC |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | OEM Panels, Enclosures, DIN Rail Adapters |
| 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 | Auxiliary Switch, Shunt Trip, Padlock Attachment |
| Accessories | Lugs |
| Standards | CSA C22.2 No. 5, UL 489, UL 943 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, Common Trip, Quick-Make/Quick-Break, Visual Trip Indicator, Self-Test |
Product FAQs
6 answersWhat does the GFT suffix indicate on the THHQC2120GFT?
The GFT suffix designates this as a Ground Fault Circuit Interrupter (GFCI) equipped with an automatic self-test feature. The breaker periodically runs internal diagnostics to verify that the ground fault circuitry is functioning correctly, meeting UL self-test requirements.
What is the ground fault trip threshold for this breaker?
This is a Class A GFCI device. It is designed to trip when it detects a ground fault current leakage of 5mA, providing personnel protection against electrical shock.
What is the difference between the THQC2120GFT and the THHQC2120GFT?
Both are 20A, 2-pole GFCI breakers with self-test capabilities, but they differ in short circuit interrupting ratings. The standard THQC model is rated for 10kAIC, while the THHQC version provides a higher interrupting capacity of 22kAIC at 240V.
How must the pigtail neutral be wired for the GFCI to function?
The white pigtail wire must be connected directly to the neutral bar in the panel or enclosure. Without this connection to the system neutral, the breaker cannot power its internal circuitry to monitor for ground faults.
Where is the THHQC2120GFT typically installed?
This feed-thru breaker features box lugs on both the line and load sides. It is designed for OEM panels, custom control enclosures, or DIN rail mounting when used with compatible DIN rail adapters. It does not plug onto a standard load center busbar.
How are the load wires connected to this GFCI breaker?
The ungrounded (hot) conductors connect to the load terminals on the breaker. If the 120/240V circuit includes a neutral, the load neutral must connect directly to the breaker's designated load neutral terminal rather than the panel neutral bar to prevent nuisance tripping.
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