ABB / General Electric THHQB1120AF2 AFCI Molded Case Circuit Breaker
- 20A
- 1 Pole
- Bolt-On
Quantity
ABB / General Electric THHQB1120AF2 - 20A AFCI Molded Case Circuit Breaker
New
Quantity
Description
Meeting stringent NEC requirements for modern electrical systems, this 20-amp combination AFCI detects both high-energy parallel and low-energy series arcing faults. It mounts firmly into GE A-Series and ReliaGear lighting panelboards using a dependable bolt-on configuration. This model serves as the upgraded replacement for the older THHQB1120AF branch/feeder version. With a 22kAIC rating and built-in self-test capabilities, it delivers premium safety for commercial and residential spaces.Specifications
| Brand | ABB / General Electric |
|---|---|
| Part Number | THHQB1120AF2 |
| Series | THHQB |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Bolt-On |
| Voltage | 120/240VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120/240VAC |
| Frame Type | THQB |
|---|---|
| Terminal Type | Box Lugs |
| For Use With | GE A-Series Panelboards, ReliaGear Lighting Panelboards |
| Wire Gauge | 14-10 AWG (Cu/Al) |
| Max Wire | 10 AWG |
| Min Wire | 14 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed |
| Special Classification | AFCI |
|---|---|
| Available Options | Padlock Attachment |
| Accessories | Combination Arc Fault Circuit Interrupter |
| Standards | CSA C22.2 No. 5, UL 489, UL 1699 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, SWD Rated, Quick-Make/Quick-Break, Trip-Free Mechanism, Non-Interchangeable Trip, Combination Arc Fault Protection |
Product FAQs
6 answersWhat is the difference between the THHQB1120AF2 and the THQB1120AF2?
The primary difference is the interrupting rating. The THHQB1120AF2 has a 22kAIC rating, while the THQB1120AF2 is rated for 10kAIC. Both are 20A, 1-pole combination arc fault breakers.
What does the "AF2" suffix indicate on this GE circuit breaker?
The "AF2" suffix designates a newer generation Combination Arc Fault Circuit Interrupter (CAFCI). Unlike older "AF" models that used a 30mA ground fault trip to detect arcs to ground, AF2 breakers use advanced arc detection logic. This eliminates the ground fault trip component, reducing nuisance tripping on shared neutral or multi-wire branch circuits.
How do I connect the pigtail neutral on the THHQB1120AF2?
The white pigtail wire must be connected directly to the panel's neutral bus bar. This connection is required to power the breaker's internal arc fault detection circuitry.
What is the recommended terminal screw torque for the box lugs on this breaker?
The recommended terminal screw torque for the load lugs on THHQB series breakers is 20 in-lb. Always verify the exact torque specification printed on the breaker label before installation.
Can I use the THHQB1120AF2 to replace a standard THHQB1120 breaker?
Yes, you can replace a standard THHQB1120 with this AFCI version if arc fault protection is required by updated electrical codes. However, you must ensure your panel has space on the neutral bus bar to connect the breaker's pigtail neutral.
Which panelboards are compatible with the THHQB1120AF2?
This bolt-on breaker is designed for use in GE A-Series Panelboards and ReliaGear Lighting Panelboards that accept THQB or THHQB frame breakers.
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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