{"product_id":"eaton-ehd1040l-40a-277v-1-pole-circuit-breaker","title":"Eaton EHD1040L - 40 A, 277 V, 1-Pole Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eMeet the Eaton \u003cstrong\u003eEHD1040L\u003c\/strong\u003e, a \u003cstrong\u003e40A\u003c\/strong\u003e, \u003cstrong\u003e277V\u003c\/strong\u003e, \u003cstrong\u003e1-pole\u003c\/strong\u003e molded case circuit breaker engineered to protect branch circuits in panelboards and loadcenters. Its compact design maximizes panel space while delivering dependable overcurrent and short‑circuit protection for modern electrical systems.\u003c\/p\u003e \u003ch3\u003eWhy this breaker stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSpace-efficient molded case design\u003c\/strong\u003e frees up valuable panel real estate without compromising protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection: the thermal element handles sustained overloads, while the magnetic action activates instantly on high-current faults.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible compatibility\u003c\/strong\u003e designed to work with matching Eaton panelboards and loadcenters for seamless integration.\u003c\/li\u003e \u003cli\u003eVersatile across \u003cstrong\u003eresidential, commercial, and light industrial\u003c\/strong\u003e applications that require reliable 277V branch-circuit protection.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhere and how you’ll use it\u003c\/h3\u003e\n\u003cp\u003eThe 40A, 277V rating makes this breaker ideal for circuits feeding lighting, receptacles, small motors, or equipment in 277V environments. It’s a practical upgrade or replacement option for panel installations in offices, retail spaces, service upgrades, or light industrial setups where compact protection is essential and space in the panel is at a premium.\u003c\/p\u003e \u003ch3\u003ePractical benefits and outcomes\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003ePeace of mind from \u003cstrong\u003econsistent trip performance\u003c\/strong\u003e under both overload and short-circuit conditions.\u003c\/li\u003e \u003cli\u003eCleaner panel organization thanks to a \u003cstrong\u003esingle-pole design\u003c\/strong\u003e that simplifies wiring and layout.\u003c\/li\u003e \u003cli\u003eLong-term reliability by aligning with Eaton’s protection strategy across compatible panel systems.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eUse cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eReplacing a failed or aged 40A, 277V single-pole breaker in an existing panelboard or loadcenter.\u003c\/li\u003e \u003cli\u003eUpgrading branch-circuit protection for 277V lighting or receptacle circuits in commercial spaces.\u003c\/li\u003e \u003cli\u003eAdding robust protection for 277V-powered equipment in light industrial environments.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical specifications\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Eaton\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e EHD1040L\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 40A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 277V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of Poles:\u003c\/strong\u003e 1\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\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349551009954,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/eaton-ehd1040l-40-a-277-v-1-pole-circuit-breaker-ampstate-breakers-962.webp?v=1788682016","url":"https:\/\/www.ampstate.com\/products\/eaton-ehd1040l-40a-277v-1-pole-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}