{"product_id":"square-d-ejb34045-45a-480v-3-pole-bolt-on-circuit-breaker","title":"Square D EJB34045 - 45 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D EJB34045 is a 45A, 480V, 3-pole bolt-on molded case circuit breaker designed to shield your electrical distribution system from overloads and short circuits. Built for dependable branch circuit protection in panelboards and load centers, it combines secure mounting, precise protection, and broad compatibility.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e: a rigid, vibration-resistant bus connection reduces movement and loosening in demanding environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e: combines thermal overload protection with magnetic instantaneous trip for fast, repeatable responses to faults.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility\u003c\/strong\u003e: engineered to integrate with matching Square D OEM load centers and panelboards for a clean, reliable fit.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e: suitable for residential, commercial, and light industrial distribution needs.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhat this means in practice: you get a single, proven solution to protect feeders, branch circuits, and equipment from overcurrent and short circuits. The 3-pole configuration ensures balanced protection across all phases, which is crucial in three-phase panelboards and commercial installations.\u003c\/p\u003e \u003ch3\u003eKey specifications\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number:\u003c\/strong\u003e EJB34045\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage rating:\u003c\/strong\u003e 45 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 480 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of poles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting style:\u003c\/strong\u003e Bolt-on\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use scenarios\u003c\/h3\u003e \u003cp\u003eInstall the EJB34045 in panelboards and load centers that feed lighting, receptacle circuits, and modest motor loads where 480 V three-phase distribution is standard. Its secure mounting and reliable trip characteristics help minimize nuisance trips and ensure consistent protection when starting motors or HVAC equipment. Because it’s designed for OEM compatibility, you can swap in this breaker for a like-for-like replacement without modifying bus connections or panel architecture.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355211845794,"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-ejb34045-45-a-480-v-3-pole-bolt-on-circuit-breaker-730.webp?v=1788741664","url":"https:\/\/www.ampstate.com\/products\/square-d-ejb34045-45a-480v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}