Siemens QA120AFCH 20A 1P Circuit Breaker, AFCI, Combination AFCI | AmpState

Siemens QA120AFCH delivers reliable arc-fault protection in a compact 1-pole, 20-amp package designed for panelboards, load centers, and electrical distribution networks. This Combination AFCI breaker is engineered to detect and interrupt a wide range of arc faults, helping reduce fire risk and support code-compliant installations in both new constructions and retrofits.

What makes QA120AFCH unique

• Combination AFCI protection covers both parallel and series arc faults, providing comprehensive arc-fault detection for branch circuits.
• Direct part-number match—QA120AFCH is a precise Siemens part, simplifying replacements and inventory management for panel builders and maintenance teams.
• 20 A, 1-pole design suits typical lighting and receptacle circuits, offering a balance of protection and current capacity.
• Panelboard, load center compatibility designed for use in Siemens-based electrical distribution systems, ensuring reliable integration with existing gear.
• Stocked by AmpState with easy availability, backed by compatibility support to confirm fit for your panel or load center.

Ideal use cases

Great for residential upgrades where AFCI requirements apply, new-build panel installations in apartments or townhomes, and maintenance stock for electrical contractors and panel shops. If you're replacing an existing AFCI breaker or specifying parts for a Siemens-based distribution system, QA120AFCH provides a straightforward, code-ready solution.

Specifications at a glance

• Manufacturer: Siemens
• Part Number: QA120AFCH
• Product Type: Circuit Breaker
• Amperage: 20 A
• Poles: 1 Pole
• Protection Type: AFCI Combination

Need help confirming compatibility with your panel or bus arrangement? Message AmpState, and our team will verify the fit and recommend the best approach to integration.