{"product_id":"square-d-qob1201021-20a-1-pole-bolt-on-circuit-breaker","title":"Square D QOB1201021 - 20 A, 1-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Square D QOB1201021 — a 20A, 1-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection in panelboards and load centers. From AmpState, this unit pairs rugged bolt-on mounting with a thermal-magnetic trip system to provide precise, repeatable protection that handles both overloads and short circuits.\u003c\/p\u003e \u003ch2\u003eKey Features that matter in the real world\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-on mounting\u003c\/strong\u003e creates a rigid, vibration-resistant connection to the panel bus, reducing the risk of heating, arcing, or loose seating over time.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e combines a thermal element for gradual overload protection with a magnetic element for instantaneous response to high fault currents, minimizing nuisance trips while guarding every downstream circuit.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e20A, 1-pole design\u003c\/strong\u003e is ideal for light loads, branch circuits, and dedicated circuits within residential, commercial, and light industrial applications.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-level compatibility\u003c\/strong\u003e works seamlessly with matching Square D OEM load centers and panelboards for straightforward replacement and upgrade projects.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eApplications and real-world use cases\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eNew installations in residential panelboards where a compact, reliable 1-pole breaker is required for individual branch circuits.\u003c\/li\u003e \u003cli\u003ePanelboard upgrades or replacements in commercial spaces where predictable trip behavior helps prevent downstream equipment damage.\u003c\/li\u003e \u003cli\u003eLight industrial environments needing robust protection for small-diameter or non-motor load circuits without compromising panel integrity.\u003c\/li\u003e \u003cli\u003e OEM-matched assemblies where consistency across the protection scheme simplifies maintenance and parts stocking.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhy choose this QOB1201021 breaker\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eDurable bolt-on design eliminates field-soldered connections and reduces install vibration, promoting long-term reliability in busy electrical panels.\u003c\/li\u003e \u003cli\u003eThermal-magnetic protection offers stable, repeatable performance across temperature and current fluctuations, protecting both conductors and connected devices.\u003c\/li\u003e \u003cli\u003eSpecifically rated for branch circuit overcurrent and short-circuit protection, ensuring fast, predictable responses to faults without compromising normal operation.\u003c\/li\u003e \u003cli\u003eDesigned to align with Square D panelboards and load centers, enabling straightforward sourcing and maintenance for existing systems.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e QOB1201021\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\u003eNumber of poles:\u003c\/strong\u003e 1\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting style:\u003c\/strong\u003e Bolt-on\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 \u003cp\u003eFor electricians and facility managers, the Square D QOB1201021 represents a precise, durable choice for protecting circuits in a wide range of panel configurations. Its combination of secure mounting, robust protection, and OEM-compatible design helps ensure reliable operation and easier maintenance across residential, commercial, and light industrial environments.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355406094498,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/schnieder_and_square_d_breaker_and_panel_05c2f920-7e80-48ba-b40e-3c001a0aed8d.png?v=1764691890","url":"https:\/\/www.ampstate.com\/products\/square-d-qob1201021-20a-1-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}