{"product_id":"square-d-qou345-45a-3p-240v-circuit-breaker","title":"Square D QOU345 45A 3P 240V Circuit Breaker, Bolt-On | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D QOU345 is a dependable bolt-on circuit breaker designed to safeguard electrical distribution in panelboards, load centers, and other origins of power delivery. With a 45 Amp, 3-pole configuration for 240V systems, this unit delivers robust, reliable protection for everyday electrical work and maintenance projects alike. Its bolt-on design is purpose-built for retrofit scenarios where keeping the same part number simplifies ordering, stocking, and service planning.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 45 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 240 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Bolt-On\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e QOU345\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Panelboards, Load Centers, Electrical Distribution\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e AmpState\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThe QOU345 shines in retrofit and maintenance-heavy environments. When upgrading or servicing existing equipment, a part number you can trust matters for quick ordering and predictable replacements. The bolt-on mounting provides a secure, rugged connection suitable for demanding installations, reducing the risk of loose connections during service or vibration. With its 3-pole, 240V protection, this breaker is well-suited for three-phase electrical systems common in commercial and industrial settings.\u003c\/p\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e retrofit-ready:\u003c\/strong\u003e Bolt-on mounting streamlines installation in panels where a site-specific fit must be preserved, minimizing downtime during upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart-number consistency:\u003c\/strong\u003e QOU345 supports long-term maintenance planning and easy part sourcing, avoiding the confusion that can come with changing identifiers.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eClear compatibility path:\u003c\/strong\u003e Built for panelboards and load centers, it integrates with standard Square D distribution setups, helping maintain continuity in electrical protection schemes.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-phase readiness:\u003c\/strong\u003e 3-pole configuration ensures synchronized protection across all conductors in 240V, three-phase circuits.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIf you’re unsure about fit or compatibility, AmpState is ready to help. \u003cem\u003eMessage us to confirm the QOU345’s compatibility with your panelboard or load center and we’ll verify the correct fit.\u003c\/em\u003e\u003c\/p\u003e \u003cp\u003ePractical tips for use:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003ePlan retrofits by verifying that your existing panel supports bolt-on breakers and the QOU345’s 3-pole, 240V rating.\u003c\/li\u003e \u003cli\u003eCoordinate maintenance windows so you can safely shut down circuits and replace breakers without disrupting critical loads.\u003c\/li\u003e \u003cli\u003eStore spare QOU345 units with other protective devices in your inventory to simplify future maintenance planning.\u003c\/li\u003e \u003cli\u003eFollow the manufacturer’s installation guidelines to ensure secure mounting and proper electrical protection coverage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46410902929570,"sku":"QOU345","price":441.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_83963f7f-600e-419f-90c6-e7677089642b.png?v=1765492973","url":"https:\/\/www.ampstate.com\/products\/square-d-qou345-45a-3p-240v-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}