{"product_id":"siemens-hed43b090l-90a-480v-3-pole-bolt-on-circuit-breaker","title":"Siemens HED43B090L - 90 A, 480 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens HED43B090L—a 90A, 480V, 3-pole bolt-on molded case circuit breaker designed for reliable branch circuit protection in panelboards and loadcenters. Built to perform in residential, commercial, and light industrial environments, this unit delivers precise, durable protection where it matters most.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e for a rigid, vibration-resistant bus connection that maintains high-quality electrical contact even in demanding installations.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protective action against overcurrent and short circuits, reducing nuisance trips and helping ensure coordination with upstream devices.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-ready compatibility\u003c\/strong\u003e engineered to align with matching Siemens loadcenters and panelboards for straightforward, plug-and-play installation.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole design for 3-phase systems\u003c\/strong\u003e ideal for 480V, three-phase feeders and protection of commercial and light industrial circuits.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRugged construction\u003c\/strong\u003e built to withstand vibration and environmental stresses typical of panel installations, delivering long-term reliability.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhy this breaker stands out\u003c\/strong\u003e in a world of generic protection devices, the HED43B090L combines precise thermal-magnetic tripping with a solid bolt-on mount, ensuring secure connections and predictable trip behavior under load. This means fewer unexpected outages and more consistent protection for your electrical gear.\u003c\/p\u003e \u003ch3\u003eKey specifications at a glance\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: HED43B090L\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: 3\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 \u003ch3\u003eIdeal use scenarios\u003c\/h3\u003e\n\u003cp\u003eThe Siemens HED43B090L is well-suited for:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eNew installations in commercial panelboards and industrial loadcenters that require 480V three-phase protection.\u003c\/li\u003e \u003cli\u003eUpgrades or replacements in existing Siemens systems where a high-reliability, bolt-on MCCB is preferred.\u003c\/li\u003e \u003cli\u003eApplications demanding robust vibration resistance and durable connections in demanding electrical environments.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical considerations and installation tips\u003c\/h3\u003e\n\u003cp\u003eTo maximize performance, ensure the bolt-on terminals are torqued to the manufacturer's specifications and that the breaker is seated firmly in the panelboard bus before applying voltage. This unit is designed to coordinate with Siemens OEM components, so using it within a matched Siemens system helps maintain consistent trip characteristics and protective coordination.\u003c\/p\u003e \u003cp\u003eFor professionals planning a 3-phase 480V feeder or upgrading protection in a panelboard, the HED43B090L provides a dependable, field-proven solution that combines secure mounting, precise protection, and OEM compatibility—delivering clear, real-world advantages for reliable electrical safety and system uptime.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349801816226,"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_88e1b3bf-06ff-40c3-8312-776f041fa805.png?v=1764157225","url":"https:\/\/www.ampstate.com\/products\/siemens-hed43b090l-90a-480v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}