{"product_id":"square-d-ejb14045-45a-277v-1-pole-bolt-on-circuit-breaker","title":"Square D EJB14045 - 45 A, 277 V, 1-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003eThe Square D EJB14045 is a purpose-built 45-ampere, 277-volt, 1-pole bolt-on molded case circuit breaker designed to deliver reliable branch-circuit protection in panelboards and load centers. Built to stand up to the demands of residential, commercial, and light industrial environments, this breaker pairs straightforward installation with dependable protection, helping you keep circuits safe and equipment protected. \u003ch3\u003eKey advantages that set this breaker apart\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e for a rigid, vibration-resistant bus connection that stays solid through motor starts and routine panel activity.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e provides stable, repeatable protection for both overcurrent and short-circuit events, helping to minimize nuisance trips while preserving circuit integrity.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design\u003c\/strong\u003e ensures seamless compatibility with matching Square D load centers and panelboards, simplifying replacements and upgrades.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applicability\u003c\/strong\u003e suited for residential, commercial, and light industrial circuits, giving you a single, reliable solution across various installations.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMolded case reliability\u003c\/strong\u003e combines durable construction with predictable performance over time, reducing maintenance needs in demanding electrical environments.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical specifications at a glance\u003c\/h3\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 EJB14045\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 277 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of poles:\u003c\/strong\u003e 1\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting style:\u003c\/strong\u003e Bolt-on\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePrimary application:\u003c\/strong\u003e Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eUse cases and practical benefits\u003c\/h3\u003e\n\u003cp\u003eDesigned for panelboards and load centers, the EJB14045 excels wherever a dedicated 45A protective device is needed for a single-channel circuit. In residential settings, it can safeguard critical branch circuits feeding lighting, outlets, or small appliances. In commercial environments, it’s well-suited for lighting panels, receptacle banks, or simple HVAC controls that require dependable protection without frequent maintenance.\u003c\/p\u003e \u003cp\u003eThe bolt-on mounting delivers a more robust connection than non-bolt-on options, reducing the risk of loose connections in vibration-prone installations or in spaces with regular equipment start-up. The thermal-magnetic trip mechanism ensures quick, predictable responses to faults, helping to prevent damage to wiring and connected equipment while supporting safe disconnection during abnormal conditions.\u003c\/p\u003e \u003ch3\u003eInstallation, compatibility, and best practices\u003c\/h3\u003e\n\u003cp\u003eFor installers and maintenance professionals, this breaker pairs with matching OEM load centers and panelboards from Square D, ensuring a clean, reliable fit. When replacing an existing 45 A device in a compatible panel, this unit provides a straightforward bolt-on swap with familiar field service procedures. Always verify that the panelboard is rated for bolt-on molded case breakers of the EJB family and that the circuit design aligns with 277 V operation requirements.\u003c\/p\u003e \u003ch3\u003eWhy choose this Square D breaker over alternatives\u003c\/h3\u003e\n\u003cp\u003eIf you need a dependable, single-pole protection solution that combines secure mounting with precise thermal-magnetic trip performance, the EJB14045 is purpose-built for that role. Its bolt-on design minimizes movement and vibration-induced wear, while the integrated trip unit offers reliable protection tailored to real-world load profiles. When you require compatibility with Square D’s panel ecosystems and a device that supports consistent protection across a range of commercial and light industrial applications, this model delivers focused, durable performance.\u003c\/p\u003e \u003cp\u003eIn short, the Square D EJB14045 is a precise, robust, and panel-ready choice for safeguarding branch circuits in diverse settings, delivering dependable protection where it matters most.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355206996130,"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-ejb14045-45-a-277-v-1-pole-bolt-on-circuit-breaker-977.webp?v=1788741255","url":"https:\/\/www.ampstate.com\/products\/square-d-ejb14045-45a-277v-1-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}