Siemens QA120AFC 20A 1P 120V Circuit Breaker, AFCI, Combination AFCI, Plug-On | AmpState

Engineered for reliable arc-fault protection in residential and light commercial panels, the Siemens QA120AFC 20A 1P 120V Circuit Breaker delivers consistent safety where it matters most. This Combination AFCI plug-on breaker guards electrical circuits against dangerous arcing, helping you meet modern wiring standards while keeping your panelboards, load centers, and distribution systems running smoothly. Ideal for replacement projects and stocking spares, QA120AFC is designed to align your BOM with the original part number, reducing guesswork during upgrades.

Key Features & Benefits

• Combination AFCI protection detects both series and parallel arcs, providing comprehensive arc-fault safety for living spaces and receptacle circuits.
• Plug-On design offers fast, tool-free installation that minimizes downtime during replacements.
• 1-pole, 20-amp, 120-volt configuration tailored for typical branch circuits in residential panels.
• Panel compatibility designed to fit Siemens QA family panels in panelboards, load centers, and electrical distribution setups.
• BOM-aligned replacement perfect for projects that require adherence to the original part number (QA120AFC).
• Stocking flexibility a smart spare to keep critical circuits protected without delaying installations.

Where it Fits

The QA120AFC is intended for use in panelboards, load centers, and electrical distribution systems where AFCI protection is required. It serves as a direct upgrade for circuits needing enhanced arc-fault safety, helping you meet current code expectations in living areas while maintaining a clean, organized electrical distribution layout.

Installation & Compatibility

The plug-on design enables quick replacement in compatible Siemens panels without complex wiring changes. Before installation, confirm that your panel supports QA-series breakers and that a 1-pole, 20A, 120V AFCI configuration matches the circuit you’re protecting. For best results, have a licensed electrician perform replacements to ensure secure connections and proper commissioning.

Why AmpState

AmpState offers the Siemens QA120AFC, with support to verify part compatibility and BOM alignment. If you’re unsure about fit, send us a message and we’ll help confirm the exact match for your panel and project needs.

Specifications

• Amperage: 20 A
• Poles: 1
• Voltage: 120V
• Type: Circuit Breaker
• Part Number: QA120AFC
• Product Type: Circuit Breaker
• AFCI: Combination AFCI
• Plug-On: Yes