{"product_id":"siemens-hed42b090l-90a-480v-2-pole-bolt-on-circuit-breaker","title":"Siemens HED42B090L - 90 A, 480 V, 2-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eSiemens HED42B090L\u003c\/strong\u003e is a 90A, 480V, 2-pole bolt-on molded case circuit breaker designed to deliver dependable branch-circuit overcurrent and short-circuit protection in panelboards and loadcenters.\u003c\/p\u003e \u003cp\u003eBuilt for demanding environments, the \u003cstrong\u003ebolt-on mounting\u003c\/strong\u003e provides a secure, vibration-resistant connection to the bus bars, reducing movement under machinery or building vibrations and helping maintain reliable protection trip after trip.\u003c\/p\u003e \u003cp\u003eThe \u003cstrong\u003ethermal-magnetic trip unit\u003c\/strong\u003e delivers precise protection by combining a fast magnetic trip for sudden short circuits with a calibrated thermal element that responds to sustained overloads, ensuring stable, repeatable protection performance across varying temperatures and load conditions.\u003c\/p\u003e \u003cp\u003eDesigned for \u003cstrong\u003eOEM compatibility\u003c\/strong\u003e, this breaker is engineered to fit matching Siemens OEM loadcenters and panelboards, enabling straightforward retrofits, fewer compatibility concerns, and a clean, reliable installation.\u003c\/p\u003e \u003cp\u003eIdeal for \u003cstrong\u003eresidential, commercial, and light industrial\u003c\/strong\u003e applications that require robust 90A protection on 480V circuits. Use cases include feeder protection, sub-feed panels, and service-entry protection in small to mid-size facilities where dependable, long-term performance matters.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eSpecifications at a glance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Siemens\u003c\/li\u003e \u003cli\u003ePart Number: HED42B090L\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage Rating: 90A\u003c\/li\u003e \u003cli\u003eVoltage Rating: 480V\u003c\/li\u003e \u003cli\u003eNumber of Poles: 2\u003c\/li\u003e \u003cli\u003eMounting Style: Bolt-on\u003c\/li\u003e \u003cli\u003eApplication: Branch circuit overcurrent and short-circuit protection\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this bolt-on breaker stands out: the rigid, vibration-resistant bus connection minimizes movement that can lead to nuisance trips, while the thermal-magnetic protection adapts to real-world operating conditions for dependable, repeatable performance. When you need a compatible, high-value solution for Siemens panel families, the HED42B090L delivers a confident, plug-and-play upgrade or spare for critical electrical infrastructure.\u003c\/p\u003e \u003cp\u003ePractical tips for use: plan for a 2-pole 480V configuration in systems that require line-to-line protection, verify panelboard compatibility with Siemens OEM components, and keep a few spare units on hand for quick service in commercial environments. This approach helps maintain uptime and simplifies maintenance in panels that demand consistent, long-term protection.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349801029794,"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_e8d8bf77-dfb7-4fec-a433-b57ee5d7e9c8.png?v=1764157193","url":"https:\/\/www.ampstate.com\/products\/siemens-hed42b090l-90a-480v-2-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}