{"product_id":"square-d-ejb34040-40a-480v-3-pole-bolt-on-circuit-breaker","title":"Square D EJB34040 - 40 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Square D EJB34040—a 40 A, 480 V, 3‑pole bolt‑on molded case circuit breaker built to deliver dependable branch circuit protection in panelboards and load centers. Designed for demanding 3‑phase environments, this unit neutralizes overloads and short circuits with precise, repeatable performance while withstanding the rigors of busy electrical rooms.\u003c\/p\u003e \u003ch2\u003eWhy this breaker stands out\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt‑on mounting\u003c\/strong\u003e creates a rigid, vibration‑resistant bus connection that stays put through temperature changes and equipment vibration—minimizing wear and maintaining reliable protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal‑magnetic trip unit\u003c\/strong\u003e combines thermal overload sensing with instantaneous magnetic action, delivering stable, repeatable protection across varying loads and fault conditions.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3‑pole, 480 V capacity\u003c\/strong\u003e is tailored for 3‑phase panelboards and load centers common in commercial and light industrial settings, enabling safe control of motors and equipment.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility\u003c\/strong\u003e ensures seamless integration with matching Square D OEM load centers and panelboards, reducing installation guesswork and ensuring coordinated protection schemes.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatility across applications\u003c\/strong\u003e suitable for residential, commercial, and light industrial installations—perfect for motor controllers, lighting branches, and general distribution circuits.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhat problems it solves\u003c\/h2\u003e\n\u003cp\u003eBy delivering predictable tripping behavior, the EJB34040 helps protect wiring, components, and connected equipment from damaging overloads and short circuits. The rugged bolt‑on design minimizes connection loosening over time, which translates to fewer nuisance trips and more consistent protection on busy electrical systems.\u003c\/p\u003e \u003ch2\u003eTechnical snapshot\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e EJB34040\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 40 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 \u003ch2\u003eIdeal for\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e3‑phase panelboards and load centers in commercial facilities\u003c\/li\u003e \u003cli\u003eLight industrial electrical distributions and motor circuits\u003c\/li\u003e \u003cli\u003eResidential–commercial transitions where robust 3‑pole protection is required\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIf you’re upgrading or provisioning a 3‑phase electrical distribution, the Square D EJB34040 delivers reliable protection with a secure, vibration‑resistant mount, precise trip performance, and firmware‑friendly compatibility with Square D OEM panels. It’s a practical choice for electricians and facilities professionals seeking durable, industry‑standard protection at 480 V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355210633378,"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-ejb34040-40-a-480-v-3-pole-bolt-on-circuit-breaker-774.webp?v=1788741655","url":"https:\/\/www.ampstate.com\/products\/square-d-ejb34040-40a-480v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}