Siemens Q120AFCNL AFCI Miniature Circuit Breaker
- 20A
- 1 Pole
- Plug-On
Siemens
Q120AFCNL
AFCI Miniature Circuit Breaker
Brand
Siemens
SKU
Q120AFCNL
Quantity
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Siemens Q120AFCNL - 20A AFCI Miniature Circuit Breaker
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Description
Delivering combination arc-fault protection, this 20-amp single-pole breaker meets modern NEC requirements for residential living spaces. The unit utilizes thermal-magnetic trip technology alongside advanced electronic sensing to detect hazardous arcing conditions. It installs into Siemens plug-on neutral load centers, completely eliminating the need for a traditional pigtail connection.Specifications
| Brand | Siemens |
|---|---|
| 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 Plug-On Neutral 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 | Lugs Not Included |
| Standards | CSA C22.2 No. 5, UL 1699, UL 489 |
| Approval | CSA, HACR, SWD, UL |
| Temp Rating | 40C |
Product FAQs
5 answersWhat load centers are compatible with the Q120AFCNL?
This breaker requires a Siemens Plug-On Neutral load center, such as the SN or PN Series. It will not work in older legacy panels like the EQ series because it does not have a neutral pigtail.
How does the plug-on neutral design affect installation?
The Q120AFCNL eliminates the traditional neutral pigtail wire. It connects directly to the neutral bus bar when seated in a compatible panel, reducing wiring clutter and saving gutter space.
What is the difference between the Q120AFCNL and the Q120AFC?
The Q120AFCNL is the Plug-On Neutral version designed for modern Siemens SN and PN Series load centers. The Q120AFC is the pigtail version, which must be used in older panels that lack a plug-on neutral bus.
What type of arcing does this combination arc fault breaker detect?
As a Combination Arc Fault Circuit Interrupter (CAFCI), it detects both series and parallel arcing conditions to help prevent electrical fires, meeting NEC requirements for residential living areas.
Does the Q120AFCNL provide ground fault protection?
No, this model provides arc fault protection only. If a circuit requires both arc fault and ground fault protection, a Dual Function breaker is required instead.
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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.