Free Shipping Over $99
Siemens QA120AFCN AFCI Miniature Circuit Breaker
- 20A
- 1 Pole
- Plug-On
Siemens
QA120AFCN
AFCI Miniature Circuit Breaker
Brand
Siemens
SKU
QA120AFCN
Quantity
Shop with Confidence
Add an extra year of protection in your cart.
Siemens QA120AFCN - 20A AFCI Miniature Circuit Breaker
New
Quantity
Similar Items
20A AFCI Miniature Circuit Breaker
15A AFCI Miniature Circuit Breaker
15A AFCI Miniature Circuit Breaker
Description
Engineered for modern panels, the Siemens QA120AFCN is a 20A combination AFCI breaker that streamlines wiring while protecting against series and parallel arc faults. Featuring a plug-on neutral connection, it eliminates the pigtail wire for cleaner gutter space. It mounts into Siemens SN and PN series load centers, replacing the QA120AFC. Rated at 10kAIC at 120VAC, it includes Insta-Wire connectors for faster installation and an LED trip indicator to quickly diagnose circuit interruptions.Specifications
| Brand | Siemens |
|---|---|
| Series | QA |
| 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 (SN, PN Series) |
| 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 |
| Standards | CSA C22.2 No. 5, UL 1699, UL 489 |
| Approval | CSA, HACR, SWD, UL |
| Temp Rating | 40C |
Product FAQs
7 answersWhich load centers are compatible with the QA120AFCN breaker?
This unit requires a Siemens Plug-On Neutral (PON) load center, such as the SN or PN series. Because it mounts directly to the panel neutral bus, it cannot be installed in legacy load centers that require a traditional pigtail wire.
What is the difference between the Siemens QA120AFCN and QA120AFC?
The QA120AFCN is a Plug-On Neutral (PON) breaker that connects directly to the neutral bus in SN and PN series panels, which speeds up installation and keeps the gutter space clean. The QA120AFC includes a traditional pigtail neutral wire and is required for legacy Siemens panels that lack a plug-on neutral bus.
How do you identify the cause of a tripped QA120AFCN breaker?
This breaker features diagnostic LED trip indicators near the handle. Following a trip event, the LEDs will illuminate for 5 seconds when the breaker is turned back ON. This visual code allows you to identify the specific fault condition for up to 30 days after the trip.
What is the advantage of a Combination Type AFCI compared to older designs?
Combination Type AFCIs (CAFCI) offer comprehensive protection by detecting both high-energy parallel arcing faults (line-to-ground or line-to-neutral) and low-energy series arcing faults. Older Branch/Feeder AFCIs were only capable of detecting parallel arcs.
What is the recommended torque specification for the load terminal?
The load lug should be tightened to 25 lb-in. Always use a calibrated torque tool during installation to ensure a secure connection and prevent excessive heat buildup at the terminal.
Is this 20-amp breaker suitable for switching daily lighting loads?
Yes, this breaker carries an SWD (Switching Duty) rating. This indicates it has been tested and approved for regular use as a switch for 120VAC fluorescent lighting circuits without causing premature wear to the internal mechanism.
Is the QA120AFCN rated for use with HVAC equipment?
Yes, it is HACR rated, meaning it is certified for use with heating, air conditioning, and refrigeration equipment, provided the equipment nameplate specifies a 20-amp maximum overcurrent protection device.
SuperClub
Join free. Get 500 SuperPoints.
Earn points on eligible purchases and redeem them at checkout.
100 SuperPoints = $1 off.
Warranties
Add an extra year of protection
60-Day Warranty
Your purchase includes 60 days of SuperBreakers warranty coverage.
Add a 1-year warranty extension in your cart.
Get a Quote
Don’t see what you’re looking for?
We source obsolete and hard-to-find parts every day.
Shipping
Free Shipping Policy
Parcel shipments with item value over $99 qualify for free economy shipping within the continental US. Please call to confirm special handling instructions. We do not charge a handling fee or require a minimum amount on any order. SuperBreakers does not ship on customer accounts.
Same Day Shipping
We strive to ship out your items the same day the order is placed. In rare circumstances SuperBreakers may reserve up to 5 business days to consolidate orders for complete shipment.
Expedited Shipments
Orders being shipped via Next Day Air, 2 Day Shipping or 3 Day Shipping must be received by 3 PM EST to guarantee same-day shipments. Expedited orders only ship on normal business days. Shipments will NOT be sent out on Saturdays and Sundays.
International Shipping
All International orders require a $1,000 minimum order threshold. Due to the special nature of these shipments, we require that these be placed with a SuperBreakers representative. Additional shipping and instructions will apply. All International Orders are Non-Cancel and Non-Refundable.