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Siemens Q120AF AFCI Miniature Circuit Breaker
- 20A
- 1 Pole
- Plug-On
Siemens
Q120AF
AFCI Miniature Circuit Breaker
Brand
Siemens
SKU
Q120AF
Quantity
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Siemens Q120AF - 20A AFCI Miniature Circuit Breaker
New
Quantity
Quantity
Siemens Q120AF - 20A AFCI Miniature Circuit Breaker
New
Quantity
| Brand | Siemens |
|---|---|
| Part Number | Q120AF |
| Series | Q |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Plug-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens EQ, EQL, SEQ, EQG, PL, ES Load Centers |
| Wire Gauge | 14-8 AWG (Cu), 12-8 AWG (Al) |
| Max Wire | 8 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 | Pigtail Neutral |
| Standards | CSA C22.2 No. 5, UL 1699, UL 489 |
| Approval | CSA, HACR, SWD, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, SWD Rated, Insta-Wire, Visual Trip Indicator |
Sold out
Quantity
Siemens Q120AF - 20A AFCI Miniature Circuit Breaker
Re-Certified
Quantity
| Brand | Siemens |
|---|---|
| Part Number | Q120AF-R |
| Series | Q |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Plug-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens EQ, EQL, SEQ, EQG, PL, ES Load Centers |
| Wire Gauge | 14-8 AWG (Cu), 12-8 AWG (Al) |
| Max Wire | 8 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 | Pigtail Neutral |
| Standards | CSA C22.2 No. 5, UL 1699, UL 489 |
| Approval | CSA, HACR, SWD, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, SWD Rated, Insta-Wire, Visual Trip Indicator |
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Description
Built for residential circuit safety, this 20-amp branch/feeder arc-fault breaker identifies dangerous line-to-ground and line-to-neutral arcing conditions. The device features a standard pigtail neutral wire and Insta-Wire connectors for efficient termination. Mounts into Siemens EQ, EQL, SEQ, PL, and ES series load centers using a standard plug-on connection. While this model provides reliable protection, it is often replaced by the QA120AFC combination AFCI for modern code compliance.Specifications
| Brand | Siemens |
|---|---|
| Part Number | Q120AF |
| Series | Q |
| Amperage | 20A |
| Poles | 1 |
| Mounting Style | Plug-On |
| Voltage | 120VAC |
| Phase | 1 |
| AIC Rating | 10kA @ 120VAC |
| Frame Type | Q |
|---|---|
| Terminal Type | Lugs |
| For Use With | Siemens EQ, EQL, SEQ, EQG, PL, ES Load Centers |
| Wire Gauge | 14-8 AWG (Cu), 12-8 AWG (Al) |
| Max Wire | 8 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 | Pigtail Neutral |
| Standards | CSA C22.2 No. 5, UL 1699, UL 489 |
| Approval | CSA, HACR, SWD, UL |
| Temp Rating | 40C |
| Construction Features | HACR Rated, SWD Rated, Insta-Wire, Visual Trip Indicator |
Product FAQs
6 answersWhich load centers are compatible with the Q120AF circuit breaker?
This breaker is designed for use in Siemens EQ, EQL, SEQ, EQG, PL, and ES series load centers.
Does the Q120AF provide branch/feeder or combination arc fault protection?
The Q120AF is a branch/feeder arc fault circuit interrupter. It detects line-to-ground and line-to-neutral arcing conditions but does not provide the series arc detection found in newer combination AFCI breakers.
Does this breaker use a pigtail neutral or a plug-on neutral connection?
The Q120AF features a standard pigtail neutral wire that must be connected directly to the neutral bus bar in the panel.
What is the recommended terminal torque for the Q120AF breaker?
The load terminals on this breaker should be torqued to 25 lb-in during installation.
What is the combination AFCI replacement for the Q120AF?
The QA120AFC is the modern combination AFCI replacement for this older branch/feeder breaker. It provides both series and parallel arc fault detection to comply with current NEC standards.
Can I use aluminum wire with this 20A AFCI breaker?
Yes, the lugs accept 12-8 AWG aluminum wire, as well as 14-8 AWG copper wire.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 49 reviews.
Reviews Summary
Generated by AI from 91 most recent customer reviews
Last updated 8/1/25
Customers say these circuit breakers arrive quickly and match their specifications perfectly. Many reviews mention success finding hard-to-locate specialty breakers through this supplier. Common feedback includes praise for the accurate product descriptions, reliable shipping, and competitive pricing. While some note occasional stock limitations, users consistently report the breakers fit and function as intended.
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Rating
49 reviews
- BBBrent b.Verified BuyerReviewingSiemens Q33000S01 - 30A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars11/14/26Fit and fine
These breakers are newly required here in Los Angeles County and they fit right in. Due to the forth space I had to be careful with phasing and moving singles but it all went great.
- DTDawn T.Verified BuyerReviewingSiemens Q2150B - 150A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars10/8/26Timely
This is exactly what I was looking for! Worked perfectly, arrived promptly, no hassles.
- CGCrocefissa G.Verified BuyerReviewingSiemens Q115 - 15A 1 Pole Miniature Circuit BreakerI recommend this productRated 5 out of 5 stars9/18/26Quick delivery and great price.
The circuit breakers are at a great cost.
- JBJason B.Verified BuyerReviewingSiemens Q2150B - 150A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/18/26Great experience
The product was exactly what I needed and it arrived on time.
- DQDon Q.Verified BuyerReviewingSiemens Q3100 - 100A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars9/14/26Siemens breaker
Great customer experience, great prices and fast shipping... Definitely will be buying her again.