{"product_id":"square-d-qob345-45a-240v-3-pole-bolt-on-circuit-breaker","title":"Square D QOB345 - 45 A, 240 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D QOB345 — a 45A, 240V, 3-pole bolt-on molded case circuit breaker engineered for dependable branch circuit protection in panelboards and load centers. Built to stand up to real-world use, this breaker delivers reliable overcurrent and short‑circuit protection where it matters most.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eWhat sets the QOB345 apart?\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, reducing movement and loosening in demanding environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e offers stable, repeatable protection by precisely responding to overloads and short circuits, helping prevent nuisance trips while safeguarding equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design\u003c\/strong\u003e is made to integrate with matching Square D load centers and panelboards, simplifying installation and serviceability.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e suitable for residential, commercial, and light industrial settings, covering a wide range of distribution needs.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole, 240V configuration\u003c\/strong\u003e ideal for 3-phase systems, delivering balanced protection across all phases.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong key specs\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Square D\u003c\/li\u003e \u003cli\u003ePart Number: QOB345\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage Rating: 45A\u003c\/li\u003e \u003cli\u003eVoltage Rating: 240V\u003c\/li\u003e \u003cli\u003eNumber of Poles: 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\u003eIdeal use cases\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eUpgrading aging panels or adding protection in new panel installations for residential, commercial, and light industrial projects.\u003c\/li\u003e \u003cli\u003eProtecting feeders and individual circuits in panelboards where dependable, consistent trip performance is crucial.\u003c\/li\u003e \u003cli\u003eSituations where a robust, vibration-resistant connection is needed to maintain panel integrity over time.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhy choose bolt-on over plug-on in this context?\u003c\/strong\u003e The bolt-on design provides a sturdier mechanical bond to the bus, which translates to improved stability in panels subject to vibration, easier field servicing in crowded enclosures, and long-term reliability in critical distribution paths.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eWho should consider the Square D QOB345?\u003c\/strong\u003e Electricians, facilities managers, and contractors responsible for electrical distribution who require precise, durable 3-pole protection at 45A and 240V, backed by OEM compatibility and trusted Square D engineering.\u003c\/p\u003e \u003cp\u003eWhen you pair the QOB345 with the appropriate OEM panelboard, you get cohesive protection that aligns with code expectations, reduces unexpected trips, and streamlines maintenance—delivering peace of mind for everyday electrical distribution needs.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355420381346,"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_0acda7e3-9423-42dc-8e98-784e5e7595c5.png?v=1764691992","url":"https:\/\/www.ampstate.com\/products\/square-d-qob345-45a-240v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}