Siemens QA120AFCNL AFCI Miniature Circuit Breaker
- 20A
- 1 Pole
- Plug-On
Siemens
QA120AFCNL
AFCI Miniature Circuit Breaker
Brand
Siemens
SKU
QA120AFCNL
Quantity
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Siemens QA120AFCNL - 20A AFCI Miniature Circuit Breaker
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Description
The QAF2 frame QA120AFCNL is a 20A combination AFCI breaker designed for residential applications. It provides advanced protection against series and parallel arc faults to meet NEC requirements. Engineered with a plug-on neutral connection, this unit eliminates pigtail wiring. It mounts into Siemens SN and PN series load centers, serving as the retail-packaged equivalent to the QA120AFCN. Rated at 10 kAIC, it features an LED trip indicator and Insta-Wire connectors to streamline installation.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 QA120AFCNL circuit breaker?
This breaker is designed exclusively for Siemens Plug-On Neutral load centers, specifically the SN and PN series. It will not fit older legacy panels that require a pigtail neutral connection.
Does the QA120AFCNL require a pigtail wire for the neutral connection?
No. This is a Plug-On Neutral breaker, meaning it connects directly to the neutral bus bar in compatible Siemens SN and PN series load centers without the need for a coiled pigtail wire.
What type of arc fault protection does the QA120AFCNL provide?
It functions as a Combination Type Arc Fault Circuit Interrupter (CAFCI). This means it detects both parallel and series arcing faults to help prevent electrical fires in branch circuits, meeting modern NEC requirements for living spaces.
Can I use the QA120AFCNL to replace a QA120AFC?
Only if your panel is a Siemens Plug-On Neutral (SN or PN series) load center. The QA120AFC features a pigtail neutral wire for legacy panels, whereas the QA120AFCNL requires a direct plug-on neutral connection.
How does the thermal-magnetic trip mechanism operate on this AFCI breaker?
The thermal-magnetic components provide standard overcurrent protection. The thermal element offers a long-time delay for gradual overloads, while the magnetic element provides an instantaneous trip for severe short circuits. This operates alongside the electronic arc fault detection circuitry.
Does the QA120AFCNL include diagnostic trip indicators?
Yes, this model features LED trip indicators to help electricians quickly identify the cause of a fault, distinguishing between an arc fault and a standard overcurrent trip.
What are the wiring benefits of the QAF2 frame on the QA120AFCNL?
The QAF2 frame features angled lugs for easier wiring and provides an additional 1/4 inch of wiring bend space compared to previous Siemens AFCI designs.
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