{"product_id":"siemens-single-pole-20-amp-gfci-circuit-breaker-qf120a","title":"Siemens Single Pole 20 AMP GFCI Circuit Breaker | QF120A","description":"\u003cp data-start=\"2103\" data-end=\"2811\"\u003eSiemens QF120A is a compact 1 pole, 20 amp GFCI breaker engineered to provide both overcurrent protection and ground fault sensing for 120 volt circuits commonly used in pool, spa, and outdoor electrical installations. The unit responds to leakage currents above 5 mA, helping prevent shock hazards while maintaining a 10 kA interrupt rating for dependable fault clearing performance. The breaker uses a plug in mounting design compatible with Siemens Q series load centers and accepts 14–10 AWG copper wiring for versatile branch circuit layouts. Certified to UL and CSA standards, the QF120A supports safe, code compliant operation in residential and light commercial systems.\u003c\/p\u003e\n\u003cp data-start=\"2103\" data-end=\"2811\"\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e The Siemens QF120A is the current model that has replaced the older QF120 model.\u003c\/p\u003e\n\u003ch3 data-start=\"2813\" data-end=\"2831\"\u003e\u003cstrong data-start=\"2817\" data-end=\"2831\"\u003eHighlights\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-start=\"2832\" data-end=\"3507\"\u003e\n\u003cli data-start=\"2832\" data-end=\"2981\"\u003e\n\u003cp data-start=\"2834\" data-end=\"2981\"\u003e\u003cstrong data-start=\"2834\" data-end=\"2868\"\u003e20A \/ 120V Circuit Protection:\u003c\/strong\u003e Safeguards equipment circuits such as pumps, patio outlets, and spa heaters from overloads and short circuits.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"2982\" data-end=\"3117\"\u003e\n\u003cp data-start=\"2984\" data-end=\"3117\"\u003e\u003cstrong data-start=\"2984\" data-end=\"3013\"\u003eIntegrated GFCI Function:\u003c\/strong\u003e Trip threshold of 5 mA provides essential safety for areas exposed to moisture or outdoor conditions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3118\" data-end=\"3263\"\u003e\n\u003cp data-start=\"3120\" data-end=\"3263\"\u003e\u003cstrong data-start=\"3120\" data-end=\"3149\"\u003e10 kA Fault Interruption:\u003c\/strong\u003e Rated to interrupt high fault currents, supporting reliable performance in typical household electrical panels.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3264\" data-end=\"3375\"\u003e\n\u003cp data-start=\"3266\" data-end=\"3375\"\u003e\u003cstrong data-start=\"3266\" data-end=\"3291\"\u003eQ Series Plug In Fit:\u003c\/strong\u003e Installs easily in Siemens load centers with standard plug in breaker provisions.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"3376\" data-end=\"3507\"\u003e\n\u003cp data-start=\"3378\" data-end=\"3507\"\u003e\u003cstrong data-start=\"3378\" data-end=\"3410\"\u003eFlexible Wire Compatibility:\u003c\/strong\u003e Supports 14–10 AWG copper and select aluminum conductor sizes for varied circuit configurations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-start=\"5917\" data-end=\"5936\"\u003eAdditional Info\u003c\/h3\u003e\n\u003cp data-start=\"5937\" data-end=\"6360\"\u003eThe Siemens QF120A 20 amp GFCI breaker provides 120-volt overcurrent protection and 5 mA ground-fault sensing for circuits in wet or outdoor environments. This section helps SOSPool.com customers confirm compatibility with their load centers, understand wiring requirements, and know what to verify once the breaker arrives. The plug-in design supports straightforward retrofit installation in many Siemens Q-series panels.\u003c\/p\u003e\n\u003ch2 data-start=\"6362\" data-end=\"6405\"\u003eCompatibility Checks for Online Orders\u003c\/h2\u003e\n\u003cp data-start=\"6406\" data-end=\"6523\"\u003eOnline customers typically confirm panel compatibility and circuit requirements before completing a breaker purchase.\u003c\/p\u003e\n\u003ch4 data-start=\"6525\" data-end=\"6589\"\u003eHow can I verify the QF120A will fit my electrical panel?\u003c\/h4\u003e\n\u003cp data-start=\"6590\" data-end=\"6739\"\u003eCheck the label on your load center and confirm it is a Siemens Q-series model. If so, the QF120A plug-in design typically fits without modification.\u003c\/p\u003e\n\u003ch4 data-start=\"6741\" data-end=\"6809\"\u003eIs this breaker suitable for pool, spa, or outdoor equipment?\u003c\/h4\u003e\n\u003cp data-start=\"6810\" data-end=\"6993\"\u003eYes, the QF120A is designed for wet-area circuits where GFCI protection is required. It supports 20-amp, 120-volt branch circuits commonly used for pumps, lights, and outdoor outlets.\u003c\/p\u003e\n\u003ch4 data-start=\"6995\" data-end=\"7054\"\u003eCan I replace an older GFCI breaker with this model?\u003c\/h4\u003e\n\u003cp data-start=\"7055\" data-end=\"7203\"\u003eYes, as long as your existing panel supports Siemens Q-series breakers. The electrical specifications should match your circuit’s required amperage.\u003c\/p\u003e\n\u003ch2 data-start=\"7205\" data-end=\"7247\"\u003eInstallation and Setup After Delivery\u003c\/h2\u003e\n\u003cp data-start=\"7248\" data-end=\"7347\"\u003eSOSPool.com customers often want guidance on wiring sequences and what to check after installation.\u003c\/p\u003e\n\u003ch4 data-start=\"7349\" data-end=\"7397\"\u003eWhat wiring sizes does the QF120A accept?\u003c\/h4\u003e\n\u003cp data-start=\"7398\" data-end=\"7533\"\u003eThe breaker supports 14–10 AWG copper conductors. Ensuring the correct conductor size helps maintain proper fault-clearing performance.\u003c\/p\u003e\n\u003ch4 data-start=\"7535\" data-end=\"7611\"\u003eWhat should I do if the breaker trips immediately after installation?\u003c\/h4\u003e\n\u003cp data-start=\"7612\" data-end=\"7772\"\u003eCheck for miswired neutrals, shared circuits, or downstream ground faults. The QF120A is sensitive to neutral imbalances and will trip when wiring is incorrect.\u003c\/p\u003e\n\u003ch4 data-start=\"7774\" data-end=\"7838\"\u003eHow can I confirm the GFCI function is working correctly?\u003c\/h4\u003e\n\u003cp data-start=\"7839\" data-end=\"8010\"\u003eUse the test button on the breaker and confirm power is restored when the reset lever is pressed. A proper test ensures the internal sensor responds to leakage conditions.\u003c\/p\u003e\n\u003ch2 data-start=\"8012\" data-end=\"8055\"\u003eShipping, Delivery, and Online Support\u003c\/h2\u003e\n\u003cp data-start=\"8056\" data-end=\"8144\"\u003eThis section helps online customers understand timing and what to inspect upon delivery.\u003c\/p\u003e\n\u003ch4 data-start=\"8146\" data-end=\"8186\"\u003eHow quickly does the QF120A ship?\u003c\/h4\u003e\n\u003cp data-start=\"8187\" data-end=\"8315\"\u003eMost orders ship promptly, and estimated delivery windows appear at checkout. Tracking updates provide visibility until arrival.\u003c\/p\u003e\n\u003ch4 data-start=\"8317\" data-end=\"8371\"\u003eWhat should I inspect when the breaker arrives?\u003c\/h4\u003e\n\u003cp data-start=\"8372\" data-end=\"8534\"\u003eEnsure the casing is intact, terminals are undamaged, and the trip\/reset mechanism operates smoothly. Compare the label to your existing breaker for verification.\u003c\/p\u003e\n\u003ch4 data-start=\"8536\" data-end=\"8607\"\u003eDo online customers typically add related electrical components?\u003c\/h4\u003e\n\u003cp data-start=\"8608\" data-end=\"8733\"\u003eYes, many add weatherproof covers, GFCI outlets, or replacement junction boxes to complete their outdoor electrical upgrades.\u003c\/p\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":52405254521132,"sku":"QF120A","price":67.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0698\/1943\/3260\/files\/SiemensSinglePole20AMPGFCICircuitBreakerQF120ASOSPool_3.jpg?v=1766078100","url":"https:\/\/www.sospool.com\/products\/siemens-single-pole-20-amp-gfci-circuit-breaker-qf120a","provider":"SOS Pool \u0026 Spa Supplies","version":"1.0","type":"link"}