{"product_id":"square-d-qo145-45a-120v-1-pole-plug-in-circuit-breaker","title":"Square D QO145 - 45 A, 120 V, 1-Pole Plug-In Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the \u003cstrong\u003eSquare D QO145\u003c\/strong\u003e — a 45A, 120V, 1-pole plug-in circuit breaker built for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Designed for fast deployment, it snaps into place with a \u003cem\u003eplug-in\u003c\/em\u003e connection that reduces installation time and simplifies replacements when service calls or upgrades are needed.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003e45 Amps, 120 Volts, 1-Pole\u003c\/strong\u003e — targeted protection for a dedicated branch circuit within residential, commercial, or light industrial systems.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePlug-in Molded-Case Design\u003c\/strong\u003e — a rugged, compact form factor that slides into compatible QO load centers for quick, tool-free installation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-Magnetic Trip Unit\u003c\/strong\u003e — delivering stable, repeatable protection with fast fault response while minimizing nuisance trips during inrush conditions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM Compatibility\u003c\/strong\u003e — engineered to integrate seamlessly with matching Square D QO load centers and panelboards for reliable performance and straightforward replacements.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile Applications\u003c\/strong\u003e — ideal for residential circuits, light commercial feeders, and simple power-distribution needs across varied environments.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cp\u003eWhat makes the QO145 different is its deliberate pairing of a plug-in connection with a dependable thermal-magnetic protection scheme. This combination reduces downtime during panel servicing and provides predictable trip behavior, helping protect wiring and connected devices without overcomplicating maintenance or upgrades. It’s a practical, future-ready choice for any project that uses Square D’s QO family of panelboards.\u003c\/p\u003e \u003ch3\u003ePractical use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eReplacing a failed breaker in existing Square D QO panelboards with minimal downtime.\u003c\/li\u003e \u003cli\u003eUpgrading a branch circuit to support larger loads while staying within a 120V system.\u003c\/li\u003e \u003cli\u003eAdding a dedicated circuit in new or retrofit projects for lighting, receptacles, or equipment in residential, commercial, or light industrial settings.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical specifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Square D\u003c\/li\u003e \u003cli\u003ePart Number: QO145\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage Rating: 45A\u003c\/li\u003e \u003cli\u003eVoltage Rating: 120V\u003c\/li\u003e \u003cli\u003eNumber of Poles: 1\u003c\/li\u003e \u003cli\u003eMounting Style: Plug-in\u003c\/li\u003e \u003cli\u003eApplication: Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhen you need reliable, straightforward protection for a single, dedicated circuit within a Square D-equipped panel, the \u003cstrong\u003eQO145\u003c\/strong\u003e delivers. Its fast, plug-in installation, durable molded-case construction, and thermal-magnetic protection make it a practical choice for dependable electrical safety in a wide range of settings. Order with confidence from AmpState and keep your panel running smoothly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355397640354,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/square-d-qo145-45-a-120-v-1-pole-plug-in-circuit-breaker-ampstate-748.webp?v=1788754357","url":"https:\/\/www.ampstate.com\/products\/square-d-qo145-45a-120v-1-pole-plug-in-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}