{"product_id":"square-d-qda221004-circuit-breaker","title":"Square D | QDA221004 | Circuit Breaker | 100A | 2-Pole | Plug-In","description":"\u003cdiv\u003e\n\u003cp\u003eEngineered by Square D, the QDA221004 is a reliable plug-in circuit breaker designed to protect 240V circuits with a robust 100A trim. Built for maintenance, retrofit, and replacement projects, this 2-pole unit slides into compatible panels with ease, restoring protection quickly and with confidence.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003ePlug-in design for fast service\u003c\/strong\u003e—swap in minutes without modifying bus bars or mounting hardware, reducing downtime during panel maintenance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e100 amp, 2-pole protection\u003c\/strong\u003e—suitable for higher-demand circuits that require solid overcurrent protection across both legs of a 240V supply.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eExact compatibility\u003c\/strong\u003e—identified by part number QDA221004, ensuring you’re selecting the right component for your Square D panel system.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMaintenance, retrofit, and replacement ready\u003c\/strong\u003e—an ideal choice when upgrading or replacing aging breakers to maintain panel safety and reliability.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eCompatibility and installation notes\u003c\/h3\u003e\n\u003cp\u003eBefore ordering, confirm that your Square D panel accepts QDA-type plug-in breakers and that the ratings match your system requirements. The part number QDA221004 is the most reliable reference for compatibility, so verify this against your panel labeling and service plan.\u003c\/p\u003e \u003ch3\u003eUse cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003ePanel upgrades where 100A protection is required for critical 240V circuits\u003c\/li\u003e \u003cli\u003eReplacement of a failed or aging 2-pole breaker in Square D installations\u003c\/li\u003e \u003cli\u003eRetrofit projects in commercial or industrial panels that use plug-in breakers of the QDA family\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\u003cstrongamperage:\u003e 100A\u003c\/strongamperage:\u003e\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 2-Pole\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePlug-In:\u003c\/strong\u003e Yes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e QDA221004\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Square D\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical installer tip: keep a spare QDA221004 on hand for planned maintenance or rapid retrofits, and always cross-check the panel’s labeling to ensure a correct, safe fit. This targeted, plug-in solution helps maintain uninterrupted electrical protection with minimal downtime.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46424733876386,"sku":"QDA221004","price":3591.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_a085eff1-75dd-47ee-b131-4c8df8f0489b.png?v=1765492976","url":"https:\/\/www.ampstate.com\/products\/square-d-qda221004-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}