{"product_id":"square-d-qob145-45a-120v-1-pole-bolt-on-circuit-breaker","title":"Square D QOB145 - 45 A, 120 V, 1-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Square D QOB145, a rugged 45A, 120V, 1-pole bolt-on molded case circuit breaker designed to defend your panelboards and load centers from overcurrent and short-circuit events. Built for dependable, long-term service in residential, commercial, and light industrial environments, this breaker delivers a secure, solid connection right at the source of power.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eKey advantages that matter in real-world installations\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, minimizing the risk of loose terminations in demanding electrical panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e offers stable, repeatable protection: the thermal element responds to sustained overloads, while the magnetic element reacts instantly to short circuits for fast isolation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e1-pole, 45A, 120V\u003c\/strong\u003e configuration is tailored for single‑phase branch circuits needing robust protection against overcurrent in a compact form factor.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMolded case construction\u003c\/strong\u003e delivers durability and reliable performance in panelboards and load centers subjected to vibration or busy service environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design\u003c\/strong\u003e is engineered to work with matching Square D OEM load centers and panelboards, ensuring a proper fit and dependable electrical performance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhere and how you’ll use the QOB145\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis breaker is ideal for protecting a dedicated 120V branch circuit in residential panels as well as light commercial or light industrial setups. Use it to guard circuits feeding high-demand outlets, lighting runs, or small equipment that requires solid protection against both overloads and short circuits. Its bolt-on style makes it a preferred choice in panels where a robust, vibration-resistant connection is critical for ongoing reliability.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eWhy choose the Square D QOB145 over generic alternatives\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eThe combination of bolt-on mounting and a thermal-magnetic trip unit delivers a dependable, repeatable protection scheme that’s consistent with standard electrical infrastructure.\u003c\/li\u003e \u003cli\u003eCompatibility with OEM load centers and panelboards helps you avoid awkward adapters or mismatched components, reducing installation challenges and future maintenance risk.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003ePractical notes for installation and care\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eEnsure power is fully controlled and panel access follows your site’s safety procedures before mounting.\u003c\/li\u003e \u003cli\u003eMount the breaker using the designated bolt-on fasteners, then secure connections to the bus to maintain a solid electrical path.\u003c\/li\u003e \u003cli\u003ePeriodically inspect the terminations and surrounding wiring for signs of wear, discoloration, or loosening, and replace if any concerns arise.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eTechnical snapshot\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Square D\u003c\/li\u003e \u003cli\u003ePart Number: QOB145\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: Bolt-on\u003c\/li\u003e \u003cli\u003eApplications: Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355408781474,"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_fa4dadaa-6465-401a-aa19-c0b3f47f3d81.png?v=1764691913","url":"https:\/\/www.ampstate.com\/products\/square-d-qob145-45a-120v-1-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}