{"product_id":"square-d-qob240-40a-240v-2-pole-bolt-on-circuit-breaker","title":"Square D QOB240 - 40 A, 240 V, 2-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D QOB240 is a rugged, 2-pole bolt-on molded case circuit breaker engineered to safeguard your electrical system with dependable branch circuit overcurrent and short‑circuit protection. Designed for use in panelboards and loadcenters, this 40 A, 240 V breaker delivers reliable performance where it matters most.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey reasons to choose the QOB240\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e: Provides a rigid, vibration‑resistant bus connection that stays solid under demanding electrical loads.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e: Delivers stable, repeatable protection by quickly responding to overcurrent and short-circuit conditions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible\u003c\/strong\u003e: Designed to work seamlessly with matching Square D OEM load centers and panelboards, ensuring consistent protection and fit.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile for multiple environments\u003c\/strong\u003e: Suitable for residential, commercial, and light industrial applications where reliable circuit protection is essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eSpecifications at a glance\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 QOB240\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 40 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 240 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of Poles:\u003c\/strong\u003e 2\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\u003ePractical use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eProtecting branch circuits in residential panelboards where a 40 A, 240 V supply is required\u003c\/li\u003e \u003cli\u003eUpgrading or maintaining commercial loadcenters that demand secure bolt-on mounting and reliable trip performance\u003c\/li\u003e \u003cli\u003eInstalling in light industrial setups where durable, vibration-resistant connections help reduce nuisance trips\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWho benefits from the QOB240\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eElectrical contractors and installers seeking a dependable, OEM-compatible 2-pole breaker\u003c\/li\u003e \u003cli\u003eHomeowners performing panel upgrades or repairs who need proven protection for high-demand circuits\u003c\/li\u003e \u003cli\u003eFacilities managers overseeing light commercial electrical systems that require consistent fault protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWith the Square D QOB240, you’re not just selecting a breaker—you’re choosing predictable protection for your panelboards and loadcenters. Its bolt-on design, thermal-magnetic trip, and OEM compatibility translate into fewer installation hassles and more reliable circuit safeguarding across a range of applications.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355411894434,"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_95c3d89d-c98b-44f3-80fc-617739a98573.png?v=1764691944","url":"https:\/\/www.ampstate.com\/products\/square-d-qob240-40a-240v-2-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}