Siemens QF120AH GFCI Miniature Circuit Breaker
- 20A
- 1 Pole
- Plug-On
Quantity
Siemens QF120AH - 20A GFCI Miniature Circuit Breaker
New
Quantity
Description
Built for electrical systems requiring elevated short-circuit protection, this 22kAIC single-pole unit combines Class A 5mA sensitivity with automated diagnostic checks. The plug-on configuration installs into Siemens PL, ES, EQ, and Ultimate load centers, providing code-compliant safety for damp and wet environments. Replacing the discontinued QF120H, this upgraded model features a factory-installed pigtail neutral and Insta-Wire connections for faster setup.Specifications
| Brand | Siemens |
|---|---|
| Part Number | QF120AH |
| Series | QF |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Plug-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 22kA @ 120VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens PL, ES, EQ, Ultimate Load Centers |
| 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 | Pigtail Neutral |
| Standards | CSA C22.2 No. 144, UL 489, UL 943 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, SWD Rated, High Interrupting Capacity, Self-Test, Insta-Wire |
Product FAQs
6 answersWhat is the difference between the Siemens QF120 and the QF120AH?
The primary difference is the interrupting rating. The standard QF120 (and the newer QF120A) is rated at 10kAIC, while the QF120AH is rated for 22kAIC at 120V for electrical systems requiring elevated short-circuit protection.
Does the QF120AH replace any older Siemens breakers?
Yes, the QF120AH is the direct replacement for the discontinued QF120H. This upgraded model features updated electronics, automated diagnostic checks, and Insta-Wire connections for faster installation.
What level of ground fault protection does the QF120AH provide?
This breaker provides Class A ground fault protection, meaning it is designed to trip when a ground fault of 5mA (milliamps) or higher is detected. This provides code-compliant safety for damp and wet environments like kitchens, bathrooms, and outdoor receptacles.
How is the neutral connection handled on the QF120AH?
The QF120AH utilizes a factory-installed pigtail neutral wire. This pigtail must be connected directly to the neutral bus bar in the panelboard to ensure the ground-fault sensing circuitry operates correctly.
Which load centers are compatible with the QF120AH breaker?
This plug-on breaker is designed for use in Siemens PL, ES, EQ, and Ultimate series load centers. It requires one standard 1-inch space on the bus bar.
Does the QF120AH feature self-testing capabilities?
Yes, as a modern GFCI breaker engineered to meet updated UL 943 requirements, it conducts periodic automated diagnostic checks to confirm the internal ground-fault mechanism remains fully operational.
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Reviews
Review summary
Customers rate this product 4.9 out of 5 based on 22 reviews.
- TSTHOMAS S.Verified BuyerReviewingSiemens QF220 - 20A GFCI Miniature Circuit BreakerI do not recommend this productRated 2 out of 5 stars3/30/26Double check correct version
I received the Q220”A” version. Superbreaker was easy to work with for a return.
- KHKarmen H.ReviewingSiemens QF120A - 20A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/31/23Very happy
I am a small contractor in MN and when I get to the hard to find or not readily available in out are I always turn to SuperBreakers, for great selection and quick shipping.
- KHKarmen H.ReviewingSiemens QF115A - 15A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars7/31/23Breaker
I am a small contractor in MN and when I get to the hard to find or not readily available in out are I always turn to SuperBreakers, for great selection and quick shipping.
- JHJeff H.ReviewingSiemens QF120AN - 20A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars1/26/23all good
all good
- DBDean B.ReviewingSiemens QF130 - 30A GFCI Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars8/25/22Master Electrician
Lets me keep this short and simple.. Order from Super Breakers and you won’t be disappointed!!
Thank you for your business Super Breakers!