{"product_id":"siemens-hld63b300-300a-600v-3-pole-bolt-on-circuit-breaker","title":"Siemens HLD63B300 - 300 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens \u003cstrong\u003eHLD63B300\u003c\/strong\u003e — a rugged, 3-pole bolt-on molded case circuit breaker engineered to safeguard branch circuits in panelboards and loadcenters. Rated at \u003cstrong\u003e300 A\u003c\/strong\u003e and \u003cstrong\u003e600 V\u003c\/strong\u003e, this unit delivers dependable overcurrent and short-circuit protection for demanding residential, commercial, and light industrial installations. Available from AmpState, it’s built for installers who demand a secure, long-lasting connection in challenging environments.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-on mounting\u003c\/strong\u003e provides a rigid, vibration-resistant bus connection that stays secure even in areas with equipment movement or vibration.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection by combining a thermal overload element with a magnetic short-circuit trigger for rapid response.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole design\u003c\/strong\u003e suited for 3-phase power distribution, with a \u003cstrong\u003e600 V\u003c\/strong\u003e rating to accommodate modern commercial and industrial electrical systems.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM compatibility\u003c\/strong\u003e with matching Siemens panelboards and loadcenters simplifies installation and ensures coordinated performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile applications\u003c\/strong\u003e ideal for residential feeders, commercial power distribution, and light industrial circuits where reliable protection is critical.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eTechnical snapshot\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: \u003cstrong\u003eSiemens\u003c\/strong\u003e\n\u003c\/li\u003e \u003cli\u003ePart Number: \u003cstrong\u003eHLD63B300\u003c\/strong\u003e\n\u003c\/li\u003e \u003cli\u003eType: \u003cstrong\u003eThermal-magnetic molded case circuit breaker\u003c\/strong\u003e\n\u003c\/li\u003e \u003cli\u003eAmperage Rating: \u003cstrong\u003e300 A\u003c\/strong\u003e\n\u003c\/li\u003e \u003cli\u003eVoltage Rating: \u003cstrong\u003e600 V\u003c\/strong\u003e\n\u003c\/li\u003e \u003cli\u003eNumber of Poles: \u003cstrong\u003e3\u003c\/strong\u003e\n\u003c\/li\u003e \u003cli\u003eMounting Style: \u003cstrong\u003eBolt-on\u003c\/strong\u003e\n\u003c\/li\u003e \u003cli\u003eApplication: \u003cstrong\u003eBranch circuit overcurrent and short-circuit protection\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this breaker matters in real-world setups:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eIn crowded electrical rooms or vibration-prone environments, the bolt-on connection minimizes loosening and maintains consistent protection.\u003c\/li\u003e \u003cli\u003eThe thermal-magnetic trip provides a clear, predictable response to overloads and short circuits, helping protect wiring, devices, and downstream equipment.\u003c\/li\u003e \u003cli\u003eWith OEM compatibility, it’s a reliable replacement or upgrade option for Siemens panelboards and loadcenters, reducing compatibility concerns during installation.\u003c\/li\u003e \u003cli\u003eIdeal for service panels that require a robust 300 A protection point for large feeders or distribution circuits without sacrificing safety or compliance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhether you’re upgrading an existing installation or specifying parts for a new commercial or light industrial project, the \u003cstrong\u003eSiemens HLD63B300\u003c\/strong\u003e delivers trusted performance, straightforward bolt-on installation, and long-term reliability. Equip your panelboard with this dependable, high-capacity breaker and safeguard your power infrastructure with confidence. \u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349810335906,"sku":null,"price":710.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/siemens-hld63b300-300-a-600-v-3-pole-bolt-on-circuit-breaker-568.webp?v=1788731476","url":"https:\/\/www.ampstate.com\/products\/siemens-hld63b300-300a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}