{"product_id":"siemens-qa120afcncsa-20a-120v-1-pole-plug-in-circuit-breaker","title":"Siemens QA120AFCNCSA - 20 A, 120 V, 1-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens QA120AFCNCSA—a rugged 20A, 120V, 1-pole plug-in circuit breaker crafted to shield your electrical system from overcurrent and short-circuit events. Built for dependable performance in panelboards and loadcenters, this molded case breaker helps you protect residential, commercial, and light industrial circuits with confidence.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eFast plug-in connection:\u003c\/strong\u003e Simplifies installation and quick replacements, reducing downtime during panel maintenance or upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit:\u003c\/strong\u003e Delivers stable, repeatable protection by responding to both sustained overloads and instantaneous short circuits, while minimizing nuisance trips.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design:\u003c\/strong\u003e Specifically engineered to fit Siemens load centers and panelboards, ensuring reliable electrical contact and seamless integration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile protection:\u003c\/strong\u003e Ideal for a wide range of applications—home wiring, small businesses, and light industrial circuits that require solid 20A protection at 120V.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Siemens\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e QA120AFCNCSA\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage rating:\u003c\/strong\u003e 20A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 120V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of poles:\u003c\/strong\u003e 1\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting style:\u003c\/strong\u003e Plug-in\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eUse cases and who benefits\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eHomeowners upgrading or repairing a Siemens-compatible panelboard, replacing a failed or tripped breaker quickly and safely.\u003c\/li\u003e \u003cli\u003eElectrical contractors wiring kitchens, laundry rooms, or other high-demand circuits that require reliable 20A protection at 120V.\u003c\/li\u003e \u003cli\u003eSmall commercial setups and light industrial installations where fast plug-in installation minimizes downtime during panel servicing.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cp\u003eBeyond basic specs, the QA120AFCNCSA delivers practical benefits you’ll notice in everyday projects: a plug-in design that reduces installation complexity, a trip system tuned for consistent performance under varying loads, and seamless compatibility with Siemens OEM panelboards so you don’t have to chase mismatched components. This is protection that translates to safer, more reliable electrical systems with fewer interruptions.\u003c\/p\u003e \u003ch3\u003ePractical installation tips\u003c\/h3\u003e\n\u003cp\u003eFor best results, pair this breaker with a compatible Siemens panelboard, ensure the circuit load aligns with the 20A rating, and verify the slot is clean and free of debris before seating the breaker. When wiring, follow all manufacturer and local electrical codes, secure connections fully, and gently snap the unit into a properly aligned bus bar for a secure, reliable connection.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355158597794,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-qa120afcncsa-20-a-120-v-1-pole-plug-in-circuit-breaker-898.webp?v=1788736403","url":"https:\/\/www.ampstate.com\/products\/siemens-qa120afcncsa-20a-120v-1-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}