{"product_id":"square-d-eh14040","title":"Square D EH14040 40A 1-Pole 277 V Circuit Breaker","description":"\u003cdiv\u003e\n\u003cp\u003eThe Square D EH14040 is a 40A, 1-Pole circuit breaker designed for 277 V branch circuits. With the part number EH14040, this protective device delivers precise overcurrent interruption to keep single-hot circuits in commercial panels safe and compliant, helping you prevent damage from overloads and short circuits.\u003c\/p\u003e \u003ch3\u003eSpecifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Square D\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e EH14040\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCurrent Rating:\u003c\/strong\u003e 40 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 1\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage Rating:\u003c\/strong\u003e 277 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e 1-Pole, 277 V Circuit Breaker\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy this breaker matters\u003c\/h3\u003e\n\u003cp\u003e277 V circuits are common in commercial lighting and equipment distributions. This 40 A single-pole breaker provides reliable protection for those loads, ensuring that an overload or fault instantly trips the circuit to prevent insulation damage, overheating, and electrical fires. The EH14040 is built to deliver predictable performance in everyday panel configurations where 277 V protection is required.\u003c\/p\u003e \u003ch3\u003eIdeal uses and scenarios\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eProtect 277 V lighting or single-branch circuits in commercial spaces, offices, or warehouses.\u003c\/li\u003e \u003cli\u003eReplacement part for Square D panels that support EH-series 1-pole breakers.\u003c\/li\u003e \u003cli\u003eSituations where a dedicated 40 A protection point is needed for a specific 277 V load without altering adjacent circuits.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eCompatibility and installation considerations\u003c\/h3\u003e\n\u003cp\u003eUse this part for panels designed to accommodate EH-series 1-pole breakers. Confirm panel compatibility and follow proper electrical safety procedures during installation. If you’re replacing an exhausted breaker or upgrading a circuit to a 40 A limit, this EH14040 provides a straightforward, exact-fit solution for 277 V systems.\u003c\/p\u003e \u003cp\u003eFor trusted protection of your 277 V circuits, the Square D EH14040 40A 1-Pole 277 V Circuit Breaker combines precise rating with dependable performance, delivering peace of mind for commercial electrical layouts where reliability matters most.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Square D","offers":[{"title":"Default Title","offer_id":46423112286370,"sku":"EH14040","price":510.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_229276d9-908d-46df-93e5-6fe31866e0ff.png?v=1765492975","url":"https:\/\/www.ampstate.com\/products\/square-d-eh14040","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}