{"product_id":"square-d-40-amp-1-pole-277-volt-bolt-on-circuit-molded-case-breaker-ejb16040-40a-347v-1-pole-bolt-on-circuit-breaker","title":"Square D 40 Amp 1 Pole 277 Volt Bolt-On Circuit Molded Case Breaker EJB16040 - 40 A, 347 V, 1-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSquare D EJB16040\u003c\/strong\u003e is a reliable 40 Amp, 1-pole bolt-on molded case circuit breaker designed to protect your branch circuits with precision. Rated for up to \u003cstrong\u003e347V\u003c\/strong\u003e, it delivers dependable overcurrent and short-circuit protection in panelboards and load centers, making it a solid choice for a wide range of installations.\u003c\/p\u003e \u003ch2\u003eKey features\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e for a rigid, vibration-resistant bus connection that stays put in demanding environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e provides stable, repeatable protection by combining a thermal overload element with a magnetic short-circuit trip for immediate response when needed.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMolded-case construction\u003c\/strong\u003e built to withstand daily use and provide long-lasting durability in electrical panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e1-pole, 40A\u003c\/strong\u003e configuration with a \u003cstrong\u003e347V\u003c\/strong\u003e rating, ideal for single-leg feeder circuits and lighting\/receptacle runs in appropriate systems.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility\u003c\/strong\u003e designed to pair with matching Square D OEM load centers and panelboards for straightforward replacement and reliable fit.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applications\u003c\/strong\u003e suitable for \u003cem\u003eresidential, commercial,\u003c\/em\u003e and \u003cem\u003elight industrial\u003c\/em\u003e environments where dependable short-circuit protection is essential.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eWhy it matters\u003c\/h2\u003e\n\u003cp\u003eWhen wiring loads from panelboards and load centers, a single fault can cascade into expensive downtime or equipment damage. The EJB16040 delivers a crisp, predictable response to overloads and faults, helping you:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003ePrevent electrical fires and equipment damage by interrupting excessive current quickly.\u003c\/li\u003e \u003cli\u003eMaintain panel integrity with a mounting design that resists loosening from vibration and temperature changes.\u003c\/li\u003e \u003cli\u003eEnjoy compatibility confidence with panels that specify Square D OEM breakers, ensuring correct fit and trip characteristics.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eIdeal use cases\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003eReplacing or upgrading a single-pole branch circuit in residential sub-panels or light commercial panels.\u003c\/li\u003e \u003cli\u003eFeeding lighting circuits, receptacle banks, or small appliances circuits in commercial spaces with a 347V distribution scheme.\u003c\/li\u003e \u003cli\u003eUpgrading panel protection in retrofit projects where a compact bolt-on solution is required.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eSpecifications at a glance\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\u003cstrong amperage\u003e: 40A\u003c\/strong\u003e\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating\u003c\/strong\u003e: 347V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles\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\u003eType\u003c\/strong\u003e: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number\u003c\/strong\u003e: EJB16040\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eChoose the Square D \u003cstrong\u003eEJB16040\u003c\/strong\u003e for proven reliability, robust protection, and seamless integration into compatible panelboards and load centers. It’s the practical, solution-oriented choice for safeguarding electrical circuits in a variety of settings.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355427819682,"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_efa1942f-c4f7-4e26-8f62-d79829d19280.png?v=1764692060","url":"https:\/\/www.ampstate.com\/products\/square-d-40-amp-1-pole-277-volt-bolt-on-circuit-molded-case-breaker-ejb16040-40a-347v-1-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}