{"product_id":"siemens-hed42b090-90a-480v-2-pole-bolt-on-circuit-breaker","title":"Siemens HED42B090 - 90 A, 480 V, 2-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens \u003cstrong\u003eHED42B090\u003c\/strong\u003e—a rugged \u003cstrong\u003e90A, 480V, 2-pole bolt-on\u003c\/strong\u003e molded case circuit breaker designed to deliver dependable branch-circuit protection in panelboards and loadcenters. Built for challenging electrical environments, this device combines secure mounting, precise protection, and OEM-ready compatibility to keep critical circuits safe and up to code in residential, commercial, and light industrial installations.\u003c\/p\u003e \u003ch2\u003eWhy this 2-pole bolt-on breaker stands out\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e: A rigid connection to the bus minimizes vibration and movement, reducing wear and ensuring consistent performance over time.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e: Delivers stable, repeatable protection across a range of operating temperatures, automatically responding to both overload and short-circuit events.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-ready compatibility\u003c\/strong\u003e: Engineered to work with matching Siemens and other OEM load centers and panelboards, simplifying installation and maintenance in existing systems.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e: Specifically suited for 90A circuits at 480V, making it a reliable choice for residential feeders, commercial panels, and light industrial equipment feeds.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch2\u003eTechnical snapshot\u003c\/h2\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: HED42B090\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: 90A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating\u003c\/strong\u003e: 480V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNumber of poles\u003c\/strong\u003e: 2\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 \u003ch2\u003eIdeal for who and where\u003c\/h2\u003e\n\u003cp\u003eThis breaker is purpose-built for electricians and panel technicians who handle panelboard expansions, retrofits, or replacements in both new construction and service upgrades. It shines in environments where vibration or equipment reliability matters—think facility rooms, commercial spaces, and light industrial settings—where a secure, durable connection matters as much as the protection the device provides.\u003c\/p\u003e \u003ch2\u003ePractical usage and tips\u003c\/h2\u003e\n\u003cp\u003eUse the \u003cstrong\u003eHED42B090\u003c\/strong\u003e for safeguarding critical feeders and branch circuits at 480V. Pair it with compatible Siemens or OEM load centers and panelboards to maintain consistent protection coordination across the distribution system. When installing, verify compatibility with the existing bus configuration and ensure the mounting hardware is properly seated to maximize the benefits of the bolt-on design. In service and maintenance scenarios, this unit’s thermal-magnetic trip behavior supports predictable protection during routine load changes and fault events.\u003c\/p\u003e \u003ch2\u003eWhat problems it solves\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003ePrevents damage from overcurrent and short circuits on 480V circuits, safeguarding connected equipment.\u003c\/li\u003e \u003cli\u003eEliminates loose connections caused by vibration through a secure bolt-on mount, reducing nuisance trips and wear.\u003c\/li\u003e \u003cli\u003eStreamlines upgrades by matching OEM load centers and panelboards, minimizing compatibility concerns.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIn short, the Siemens \u003cstrong\u003eHED42B090\u003c\/strong\u003e is a purpose-built, installation-friendly solution for reliable 90A protection at 480V—delivering durable performance, precise trip characteristics, and seamless compatibility for a wide range of panelboard and loadcenter configurations.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349800767650,"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_a64a6ab7-969a-49d6-b600-b2013f8cdd1b.png?v=1764157191","url":"https:\/\/www.ampstate.com\/products\/siemens-hed42b090-90a-480v-2-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}