{"product_id":"square-d-qob3501021-50a-3-pole-bolt-on-circuit-breaker","title":"Square D QOB3501021 - 50 A, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D QOB3501021 is a 50A, 3-pole bolt-on molded case circuit breaker designed to deliver reliable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Its secure bolt-on mounting creates a rigid, vibration-resistant bus connection, helping ensure consistent protection even in environments with equipment vibration.\u003c\/p\u003e \u003ch3\u003eEngineered for precise, dependable protection\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e provides coordinated thermal overload and magnetic short-circuit protection, delivering fast, repeatable trips and reducing nuisance interruptions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole configuration\u003c\/strong\u003e supports 3-phase circuits, making it suitable for motors and equipment common in commercial and light industrial applications.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-on mounting\u003c\/strong\u003e establishes a solid, secure connection to the panel’s bus, enhancing reliability and ease of installation in compatible enclosures.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility\u003c\/strong\u003e is designed to match Square D panelboards and load centers, ensuring proper fit, safe operation, and straightforward replacement in existing systems.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat problems it solves\u003c\/h3\u003e\n\u003cp\u003eThis breaker protects critical electrical infrastructure by preventing damage from overcurrent and short circuits. The combination of a robust bolt-on mount and a thermal-magnetic trip unit reduces the risk of intermittent trips due to vibration or inconsistent connections, helping to minimize downtime in residential, commercial, and light industrial settings.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\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 QOB3501021\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 50 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of Poles:\u003c\/strong\u003e 3\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 \u003ch3\u003eIdeal for who and where\u003c\/h3\u003e\n\u003cp\u003ePerfect for electrical professionals and facilities managers overseeing panelboards and load centers in residential, commercial, and light industrial environments. If you’re upgrading or replacing a 50A, 3-pole bolt-on breaker in Square D or compatible OEM panels, the QOB3501021 offers a reliable, code-compliant solution with long-term performance.\u003c\/p\u003e \u003cp\u003eAvailable through AmpState, the Square D QOB3501021 50A 3-pole bolt-on breaker is ready to install in compatible panelboards and load centers, delivering the protection your circuits demand.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355420676258,"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_9530f7f7-f7c2-4807-b015-6f7523f9366c.png?v=1764691994","url":"https:\/\/www.ampstate.com\/products\/square-d-qob3501021-50a-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}