{"product_id":"square-d-qob350-50a-240v-3-pole-bolt-on-circuit-breaker","title":"Square D QOB350 - 50 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D QOB350 is a 50A, 240V, 3-pole bolt-on molded case circuit breaker designed to shield your electrical system from overcurrent and short-circuit events. Built for dependable branch circuit protection in panelboards and load centers, it delivers a secure, vibration-resistant connection and consistent protection performance in demanding environments.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e ensures a rigid, vibration-resistant bus connection that stays put in busy electrical rooms or equipment cabinets.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e provides stable, repeatable protection across varying temperatures and load conditions, reducing nuisance trips while still guarding against overloads and short circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole design for three-phase systems\u003c\/strong\u003e ideal for commercial and light industrial panels, supporting balanced protection for multi-wire circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMolded case, bolt-on style\u003c\/strong\u003e engineered for reliability in panelboards and load centers that require a secure, field-serviceable protection device.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible\u003c\/strong\u003e specifically designed to work with matching Square D panelboards and load centers, ensuring clean wiring integration and dependable operation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e suitable for residential, commercial, and light industrial environments where steady, predictable overcurrent protection is essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eTechnical snapshot\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Square D\u003c\/li\u003e \u003cli\u003ePart number: QOB350\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage rating: 50A\u003c\/li\u003e \u003cli\u003eVoltage rating: 240V\u003c\/li\u003e \u003cli\u003ePoles: 3\u003c\/li\u003e \u003cli\u003eMounting style: Bolt-on\u003c\/li\u003e \u003cli\u003eApplication: Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWho should consider the Square D QOB350?\u003c\/strong\u003e This breaker is ideal for installers upgrading or fabricating panelboards and load centers that serve three-phase equipment, such as HVAC drives, pumps, commercial lighting systems, and other motor loads commonly found in small to mid-size facilities. If you’re outfitting a panel that demands a rugged, vibration-resistant connection and precise trip behavior, the QOB350 provides a dependable solution.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003ePractical tips for best results\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003ePair with compatible OEM panels to ensure seamless mounting and electrical continuity.\u003c\/li\u003e \u003cli\u003eUse in environments where panelboard vibration or equipment movement is a factor to maximize long-term connection reliability.\u003c\/li\u003e \u003cli\u003ePlan for straightforward field replacement by selecting a bolt-on unit with a compatible trip curve for stable protection across temperature variations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355420446882,"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_d5a21014-fab2-4dc5-a86f-5a3da6569dd1.png?v=1764691993","url":"https:\/\/www.ampstate.com\/products\/square-d-qob350-50a-240v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}