Siemens QA120AFCWG 20A 1P 120V Circuit Breaker, AFCI, Combination AFCI, Plug-On | AmpState

Siemens QA120AFCWG is a 20 Amp, 1‑pole, 120V AFCI circuit breaker designed for dependable circuit protection in panelboards, load centers, and electrical distribution systems. This combination AFCI with Plug-On design offers robust arc-fault protection while simplifying installation and spare stocking, making it ideal for replacement projects and keeping your bill of materials (BOM) aligned to the original part number.

Why this AFCI breaker stands out:

• Combination AFCI protection detects both parallel and series arc faults, delivering enhanced safety for living spaces, kitchens, bedrooms, and outlets where arc faults are most likely to occur.
• Plug-On convenience enables straightforward swaps in compatible Siemens panels, reducing installation time and minimizing wiring complexity.
• Siemens QA compatibility aligns with the QA family’s fit and performance, helping maintain consistent trip characteristics and reliable operation within your existing electrical system.
• Stocking and BOM alignment—an excellent choice for replacements and service parts when you need to keep the BOM consistent with the original part number.
• Availability from AmpState, with support to confirm fit and compatibility for your panel and project needs.

Key specifications

• Amperage: 20 A
• Poles: 1-Pole
• Voltage: 120V
• Type: AFCI (Combination AFCI)
• Product Type: Circuit Breaker
• Part Number: QA120AFCWG

Ideal use cases

• Replacement installations where the original BOM specifies QA120AFCWG
• Residential panel upgrades or service panel maintenance needing AFCI protection
• New construction projects that require reliable 1‑pole AFCI protection for individual circuits
• Spare inventory for electricians and contractors to minimize downtime on service calls

Installation and care tips

• Power down the service and verify the panel is suitable for 1‑pole, 120V AFCI operation before replacing the breaker.
• Ensure the panel accepts QA‑series breakers and that the slot and wiring configuration match the Plug-On design.
• Follow local electrical codes and manufacturer instructions during installation. If in doubt, consult a licensed electrician.
• Keep a genuine spare on hand to preserve BOM integrity and simplify future replacements.

Need help confirming compatibility? Message AmpState and we’ll assist you in verifying fit for your specific panel or project, ensuring you choose the exact part that aligns with your original equipment.