{"product_id":"square-d-egb34040-40a-480v-3-pole-bolt-on-circuit-breaker","title":"Square D EGB34040 - 40 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Square D EGB34040—a dependable 40A, 480V, 3-pole bolt-on molded case circuit breaker engineered to safeguard your panelboards and loadcenters from overcurrent and short-circuit events. Built for demanding environments, this unit delivers solid protection with a focus on durability and ease of installation.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e delivers a rigid, vibration-resistant bus connection, helping maintain consistent electrical contact and reliable operation over time.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e provides stable, repeatable protection by combining thermal (overload) and magnetic (short-circuit) sensing for predictable trip behavior.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole design for 3-phase systems\u003c\/strong\u003e and a 480V rating make it ideal for commercial and light industrial applications where balanced, phase-protected power is essential.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible compatibility\u003c\/strong\u003e is designed to work with matching Square D OEM loadcenters and panelboards, ensuring a clean, proper fit and streamlined installation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-on ease-of-service\u003c\/strong\u003e simplifies replacement in existing enclosures, reducing downtime during maintenance or upgrades.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this breaker matters in real-world setups\u003c\/h3\u003e\n\u003cp\u003eIn commercial spaces, small vibrations and frequent motor starts can stress electrical circuits. The EGB34040’s bolt-on mounting and robust bus connection help resist movement and ensure ongoing contact quality. The thermal-magnetic trip unit is tuned for stable coordination with other protection devices, helping you avoid nuisance trips while still delivering fast, decisive protection when faults occur. This breaker is a practical choice for installations where 3-phase power and 480V systems are standard—think panelboards serving offices, retail facilities, data rooms, and light industrial equipment.\u003c\/p\u003e \u003ch3\u003eTechnical snapshot\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 EGB34040\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 \u003ch3\u003eWho should consider the Square D EGB34040\u003c\/h3\u003e\n\u003cp\u003eIdeal for electricians and facilities managers working with Square D panelboards and loadcenters in residential-adjacent commercial spaces, retail locations, and light industrial settings. If you need reliable 3-phase protection for 480V systems with a design that prioritizes secure mounting and predictable trip performance, this breaker is built to fit the bill.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355205062818,"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-egb34040-40-a-480-v-3-pole-bolt-on-circuit-breaker-370.webp?v=1788740967","url":"https:\/\/www.ampstate.com\/products\/square-d-egb34040-40a-480v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}