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Siemens Q120AFCP AFCI Miniature Circuit Breaker
- 20A
- 1 Pole
- Plug-On
Siemens
Q120AFCP
AFCI Miniature Circuit Breaker
Brand
Siemens
SKU
Q120AFCP
Quantity
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Siemens Q120AFCP - 20A AFCI Miniature Circuit Breaker
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Description
Engineered to detect both parallel and series arcing, this 20-amp single-pole breaker delivers comprehensive combination AFCI protection. The unit utilizes a traditional pigtail neutral wire to connect to the panel's neutral bar, ensuring reliable performance in residential applications. It mounts into standard Siemens and Murray load centers, serving as a replacement for older Q120AF models. The plug-on design features Insta-Wire connections to speed up the installation process.Specifications
| Brand | Siemens |
|---|---|
| Part Number | Q120AFCP |
| 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 Load Centers, Murray 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 | 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, LED Trip Indicator |
Product FAQs
8 answersWhat load centers are compatible with the Siemens Q120AFCP breaker?
This breaker is designed for use in standard Siemens and legacy Murray load centers. It can also be installed in Siemens plug-on neutral panels by connecting the pigtail to the neutral bar.
Does the Q120AFCP require a plug-on neutral panel?
No. This breaker features a traditional pigtail neutral connection, meaning it wires directly to the neutral bar and does not require a specialized plug-on neutral load center.
What type of arc fault protection does this breaker provide?
It is a Combination Arc Fault Circuit Interrupter (CAFCI), meaning it detects both high-energy parallel arcing and low-energy series arcing to help prevent electrical fires.
How do I identify the cause of a tripped Q120AFCP breaker?
This unit includes integrated LED trip indicators near the handle. These LEDs help electricians quickly determine if the trip was caused by an arc fault or a standard overload.
Can I use the Q120AFCP to replace older Siemens AFCI breakers?
Yes, this combination AFCI model serves as a direct replacement for older branch/feeder AFCI breakers like the Q120AF, providing upgraded series and parallel arc detection.
Is this 20-amp AFCI breaker rated for switching duty?
Yes, it carries an SWD (Switching Duty) rating, meaning it is approved for switching 120V fluorescent lighting circuits on and off on a regular basis.
What does the P in the Q120AFCP catalog number indicate?
The P indicates that this breaker uses a pigtail neutral connection rather than a plug-on neutral design.
What is the difference between the Q120AFCP and QA120AFCP?
The QA120AFCP is the second-generation version of this arc fault breaker. Both models offer the same 20-amp combination AFCI protection with a pigtail neutral connection and are directly interchangeable in Siemens load centers.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 47 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
47 reviews
- 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.
- CSChristopher S.Verified BuyerRated 5 out of 5 stars8/12/26Siemens 60
Perfect new condition
- GSGeorge S.Verified BuyerReviewingSiemens Q2150B - 150A 2 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/4/26Great service
Every time I call or go online you have the parts I'm looking for.