{"product_id":"siemens-hed42b020-20a-480v-2-pole-bolt-on-circuit-breaker","title":"Siemens HED42B020 - 20 A, 480 V, 2-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eThe Siemens HED42B020 is a 20A, 480V, 2-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection in panelboards and loadcenters. Built to withstand vibration and demanding electrical environments, this device is a precise fit for commercial and light industrial installations, while remaining suitable for residential panels that require solid overcurrent protection.\u003c\/p\u003e \u003ch3\u003eWhy the Siemens HED42B020 stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e provides a rigid, vibration-resistant bus connection, reducing movement and maintaining reliable electrical contact over time.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable overload protection and fast short-circuit interruption, ensuring consistent performance across temperature variations and duty cycles.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-ready compatibility\u003c\/strong\u003e designed to work with matching Siemens loadcenters and panelboards, simplifying replacements, upgrades, and system coordination.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile 20A, 480V, 2-pole configuration\u003c\/strong\u003e suits a range of branch circuits in commercial, industrial, and select residential panel setups that require robust protection at higher voltage.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eTechnical specifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Siemens\u003c\/li\u003e \u003cli\u003ePart Number: HED42B020\u003c\/li\u003e \u003cli\u003eType: Thermal-magnetic molded case circuit breaker\u003c\/li\u003e \u003cli\u003eAmperage Rating: 20 A\u003c\/li\u003e \u003cli\u003eVoltage Rating: 480 V\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 \u003ch3\u003eIdeal applications and use cases\u003c\/h3\u003e\n\u003cp\u003eChoose the Siemens HED42B020 for panel refresh projects, new installations, or upgrades in spaces where 480V availability and reliable 20A protection are essential. It’s well-suited for:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eCommercial electrical panels and light industrial distribution\u003c\/li\u003e \u003cli\u003eResidential and small office panels that require durable, OEM-compatible breakers\u003c\/li\u003e \u003cli\u003eEquipment disconnects and service panels within compliant Siemens systems\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation tips and practical considerations\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eUse with matching Siemens OEM loadcenters and panelboards to ensure seamless fit and optimal electrical performance.\u003c\/li\u003e \u003cli\u003eSecure bolt-on mounting to maintain a solid, vibration-resistant connection and reliable long-term operation.\u003c\/li\u003e \u003cli\u003eCoordinate with upstream protective devices to achieve proper system protection coordination and selectivity.\u003c\/li\u003e \u003cli\u003eFor replacements, verify that the circuit’s amperage and voltage requirements align with the 20A, 480V rating and that two-pole protection matches the circuit configuration.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThe Siemens HED42B020 delivers precise, repeatable protection for critical branch circuits, combining dependable thermal-magnetic performance with a robust bolt-on design. It’s a practical, future-ready choice for professionals upgrading panel systems or integrating Siemens‑based protection into commercial, light industrial, or select residential deployments.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349799817378,"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_2652e3ed-86c1-4599-8098-9debe249e034.png?v=1764157161","url":"https:\/\/www.ampstate.com\/products\/siemens-hed42b020-20a-480v-2-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}