{"product_id":"siemens-hed41b040-40a-277v-1-pole-bolt-on-circuit-breaker","title":"Siemens HED41B040 - 40 A, 277 V, 1-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens HED41B040 is a purpose-built 40A, 277V, 1-pole bolt-on molded case circuit breaker crafted to deliver dependable branch-circuit overcurrent and short-circuit protection in panelboards and load centers. Built to endure the demands of modern electrical rooms, this breaker combines robust construction with precise trip performance to keep wiring and equipment safe while minimizing nuisance trips.\u003c\/p\u003e \u003ch2\u003eWhy this breaker stands out\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e provides a rigid, vibration-resistant bus connection. In busy panels where doors are opened and closed and equipment hums nearby, the secure mounting helps maintain reliable contact and consistent protection.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection against both sustained overloads and short circuits. You get predictable trips that align with the circuit’s actual loading, reducing unexpected outages.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e277V single-pole design\u003c\/strong\u003e is purpose-built for commercial lighting circuits and other 277V applications, making it an ideal choice for office buildings, retail spaces, and light industrial environments.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e40A, 1-pole configuration\u003c\/strong\u003e offers targeted protection for individual branch circuits, allowing precise control of protection levels without unnecessary disruption to neighboring circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMolded-case construction\u003c\/strong\u003e combines durability with heat tolerance, helping the breaker withstand cycling and long service life in demanding panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility\u003c\/strong\u003e designed to fit seamlessly with matching Siemens load centers and panelboards, ensuring clean fit, proper trip characteristics, and straightforward integration into existing systems.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eIdeal use scenarios\u003c\/h3\u003e\n\u003cp\u003eConsider the Siemens HED41B040 for environments where 277V distribution is standard and reliable single-pole protection is needed. It shines in:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eCommercial lighting circuits in offices, schools, and retail spaces requiring consistent overcurrent protection at 277V.\u003c\/li\u003e \u003cli\u003eSmall-to-mid sized panelboards in light industrial settings where dedicated protection for individual branches is essential.\u003c\/li\u003e \u003cli\u003eRetrofitting or upgrading Siemens OEM panels that call for a 1-pole, bolt-on 40A breaker with a thermal-magnetic trip profile.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical snapshot\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer\u003c\/strong\u003e: Siemens\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart number\u003c\/strong\u003e: HED41B040\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\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\u003eApplication\u003c\/strong\u003e: Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eChoosing the Siemens HED41B040 means opting for a trusted solution that aligns with Siemens’ panelboard ecosystems, delivering precise protection for critical circuits while simplifying installation and maintenance in commercial and light-industrial settings. If you’re upgrading an OEM panel or configuring a new 277V distribution, this 1-pole bolt-on breaker provides the reliable performance you expect from Siemens, with the flexibility to fit your specific load-center lineup.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349799129250,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens_breaker_and_panel_6ac8a986-d575-4b16-a6d0-6ccf991a0497.png?v=1764157135","url":"https:\/\/www.ampstate.com\/products\/siemens-hed41b040-40a-277v-1-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}