Overview
The Siemens QA120AFCN is a 20 amp, 120 volt, single-pole combination-type arc-fault circuit interrupter breaker for compatible Siemens plug-on-neutral load centers. It provides thermal-magnetic overcurrent protection plus branch/feeder and series arc-fault detection with a 10 kA interrupting rating.
Key Features
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Safety: Combination AFCI protection detects parallel and series arcing conditions that conventional overcurrent protection may not detect.
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Installation: Plug-on-neutral construction connects directly to the compatible neutral rail and eliminates a coiled neutral pigtail.
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Compatibility: Type QAF2N plug-on-neutral breaker for Siemens equipment specifically listed for the QA AFCI family.
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Performance: Rated 20 A, 1 pole, 120 V AC, and 10 kA interrupting capacity.
Specifications
- Manufacturer part number: QA120AFCN
- Official type / series: QAF2N
- Current rating: 20 A
- Voltage rating: 120 V AC
- Poles / phase: 1 pole / 1 phase
- Protection: combination AFCI, thermal-magnetic
- Mounting: plug-on neutral
- Wire range: 14–8 AWG copper; 12–8 AWG aluminum
- Temperature calibration: 40°C
- Interrupting rating: 10 kA
- Standards / markings: UL 489; UL 1699; HACR; SWD
Common Applications
- Dwelling-unit bedroom, family-room, hallway, and other branch circuits requiring combination AFCI protection.
- 20 A residential circuits in compatible Siemens plug-on-neutral load centers.
- Panel upgrades replacing the exact QA120AFCN catalog number.
- Installations where a pigtail-free neutral connection simplifies panel wiring.
