{"product_id":"square-d-egb14040-40a-277v-1-pole-bolt-on-circuit-breaker","title":"Square D EGB14040 - 40 A, 277 V, 1-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eEngineered for dependable branch-circuit protection, the Square D EGB14040 40A, 277V, 1-pole bolt-on molded case circuit breaker is a smart choice for panelboards and loadcenters that demand consistent performance in challenging environments. Its robust design features a secure bolt-on mounting that delivers a rigid, vibration-resistant bus connection, helping maintain reliable protection even in assemblies subject to movement or vibration.\u003c\/p\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e ensures a tight, vibration-resistant connection to the bus, reducing the risk of loose contacts and intermittent trips.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e provides stable, repeatable protection across temperature changes and load variations, helping prevent nuisance trips while keeping circuits safe during faults.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible\u003c\/strong\u003e design aligns with matching Square D loadcenters and panelboards, simplifying integration and serviceability in existing electrical systems.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e suitable for residential, commercial, and light industrial projects where reliable single-pole protection is needed for branch circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e277V operation\u003c\/strong\u003e makes it well-suited for commercial lighting and other 277V distribution scenarios common in office environments and small facilities.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eSpecifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Square D\u003c\/li\u003e \u003cli\u003ePart number: EGB14040\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage rating: 40A\u003c\/li\u003e \u003cli\u003eVoltage rating: 277V\u003c\/li\u003e \u003cli\u003eNumber of poles: 1\u003c\/li\u003e \u003cli\u003eMounting style: Bolt-on\u003c\/li\u003e \u003cli\u003eApplication: Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cp\u003eUse the EGB14040 in panelboards and loadcenters where single-pole protection is required for 40-amp circuits. It’s a practical choice for commercial spaces with 277V lighting circuits, small offices, retail environments, and light industrial facilities that rely on dependable, low-maintenance protection.\u003c\/p\u003e \u003ch3\u003ePractical considerations and tips\u003c\/h3\u003e\n\u003cp\u003eWhen installing, ensure compatibility with your existing Square D panelboard or loadcenter and follow manufacturer torque specifications for bolt-on mounts to maintain the integrity of the bus connection. Because it uses a thermal-magnetic trip mechanism, it’s designed to respond quickly to short-circuit faults while minimizing unnecessary trips due to normal temperature fluctuations. For ongoing reliability, pair this breaker with appropriate overcurrent protection plans that reflect your circuit loading and local electrical codes.\u003c\/p\u003e \u003cp\u003e AmpState offers genuine Square D components, including the EGB14040, backed by performance you can trust for serviceable, long-term electrical protection in a variety of settings.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355197362338,"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_2043d8e1-ee8a-4b45-9eda-1a30c4d46d02.png?v=1764690264","url":"https:\/\/www.ampstate.com\/products\/square-d-egb14040-40a-277v-1-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}