{"product_id":"square-d-qo345-45a-240v-3-pole-plug-in-circuit-breaker","title":"Square D QO345 - 45 A, 240 V, 3-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D QO345 — a 45A, 240V, 3-pole plug-in molded case circuit breaker designed to guard your electrical system with fast, reliable protection. Built for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers, this breaker is ready to drop into compatible OEM panels for immediate protection.\u003c\/p\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast plug-in connection\u003c\/strong\u003e for quick installation and effortless replacements, minimizing downtime during upgrades or service calls.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection by sensing both overload and short-circuit conditions, reducing nuisance trips and ensuring consistent performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM compatibility\u003c\/strong\u003e designed to work with matching Square D OEM load centers and panelboards, ensuring proper fit, trip curves, and labeling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile applications\u003c\/strong\u003e suitable for residential, commercial, and light industrial environments where reliable 3-pole 240V protection is required.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eKey specifications\u003c\/h3\u003e \u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Square D\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e QO345\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAmperage Rating:\u003c\/strong\u003e 45A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 240V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Poles:\u003c\/strong\u003e 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Style:\u003c\/strong\u003e Plug-in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this matters: In panelboard and load center setups, reliable overcurrent protection is essential to prevent wiring damage, nuisance trips, and potential fires. The QO345 combines a robust molded case with a precise thermal-magnetic trip to deliver dependable protection when you need it most, without complicating future panel upgrades or replacements.\u003c\/p\u003e \u003cp\u003eUse scenarios include upgrading residential panels to support additional circuits, outfitting commercial distribution boards with a scalable 3-pole 240V solution, or replacing aging breakers in light industrial installations. Its plug-in design makes swapping out old breakers straightforward, reducing downtime and enabling quick maintenance windows.\u003c\/p\u003e \u003cp\u003eIf you’re aligning with Square D’s QO series, the QO345 offers a confident, spec-matched choice that pairs with compatible OEM panels to maintain the integrity of your protection scheme. Choose this 3-pole 45A 240V plug-in breaker when you need solid, dependable protection that’s easy to install and backed by a trusted brand.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355405209762,"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_8a9c7d52-6f54-438f-81d4-0826718231f3.png?v=1764691870","url":"https:\/\/www.ampstate.com\/products\/square-d-qo345-45a-240v-3-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}