{"product_id":"square-d-qob21101021-circuit-breaker","title":"Square D | QOB21101021 | Circuit Breaker | 2-Pole | 240V | Bolt-On","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D QOB21101021, a purpose-built 2-pole circuit breaker designed for reliable 240V protection in maintenance, retrofit, and replacement projects. Identified by part number QOB21101021, this bolt-on breaker is your precise compatibility match when upgrading or refreshing a panel that uses bolt-on Square D components.\u003c\/p\u003e \u003ch2\u003eKey Features and Benefits\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cb\u003e2-Pole 240V protection\u003c\/b\u003e—controls two conductors, delivering robust, dual-line circuit interruption for shared 240V circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eBolt-On mounting\u003c\/b\u003e—engineered for quick, secure installation in compatible Square D panels, reducing installation time and ensuring a solid connection.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eExact part reference\u003c\/b\u003e—the QOB21101021 part number is the most reliable indicator of compatibility, helping you avoid mismatches during maintenance or replacements.\u003c\/li\u003e \u003cli\u003e\n\u003cb\u003eVersatile use\u003c\/b\u003e—designed for maintenance, retrofit, and replacement scenarios where the exact specs matter, making it a practical choice for service technicians and facilities managers.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWho This Is For\u003c\/h2\u003e\n\u003cp\u003eIdeal for licensed electricians, building facility managers, and maintenance teams working with Square D panels that require bolt-on 2-pole, 240V breakers. If your project involves upgrading aging equipment, replacing damaged components, or retrofitting a panel for a 240V circuit, this breaker provides a compatible, reliable solution.\u003c\/p\u003e \u003ch2\u003eCommon Use Scenarios\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eReplacing a worn or damaged 240V two-pole breaker in a Square D bolt-on panel.\u003c\/li\u003e \u003cli\u003eRetrofit projects where a bolt-on QOB-style breaker is required to match existing infrastructure.\u003c\/li\u003e \u003cli\u003eMaintenance cycles in commercial or light industrial settings where consistent, predictable 240V protection is needed.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eCompatibility and Fit Verification\u003c\/h2\u003e\n\u003cp\u003eBefore ordering, verify fit by cross-referencing with the panel labeling and the exact part number. The QOB21101021 is intended for use in panels designed to accept bolt-on Square D breakers of this family. Confirm that your installation is a 2-pole, 240V configuration and that bolt-on mounting is supported in your panel model. Using the correct part number helps ensure proper ratings, mechanical fit, and electrical performance.\u003c\/p\u003e \u003ch2\u003eInstallation Considerations\u003c\/h2\u003e\n\u003cp\u003eFor safety and optimal performance, disconnect power and follow all local electrical codes during installation. Because panel configurations can vary, this work is best performed by a qualified electrician who can confirm bolt-on compatibility and complete the secure mounting required for reliable circuit protection.\u003c\/p\u003e \u003ch2\u003eWhy Choose This Square D Breaker\u003c\/h2\u003e\n\u003cp\u003eThe Square D QOB21101021 stands out for its precise compatibility with bolt-on panels and its suitability for essential 240V circuits. By aligning with the exact part number, you reduce the guesswork in replacements and retrofit projects, helping you minimize downtime and ensure consistent electrical protection across your system.\u003c\/p\u003e \u003cp\u003eIf you’re planning maintenance, retrofit, or replacement in a Square D installation that requires a 2-pole, 240V bolt-on breaker, the QOB21101021 offers a reliable, targeted solution that aligns with your panel’s design and specifications.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46427410694306,"sku":"QOB21101021","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-qob21101021-circuit-breaker-2-pole-240v-bolt-784.webp?v=1789718791","url":"https:\/\/www.ampstate.com\/products\/square-d-qob21101021-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}