{"product_id":"siemens-hjxd63b350l-350a-600v-3-pole-bolt-on-circuit-breaker","title":"Siemens HJXD63B350L - 350 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens HJXD63B350L, a rugged 350A, 600V, 3-pole bolt-on molded case circuit breaker designed to protect your panelboards and load centers with unwavering reliability. Available from AmpState, this breaker is built to integrate seamlessly into Siemens-based systems and heavy-duty electrical installations.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-on mounting\u003c\/strong\u003e delivers a rigid, vibration-resistant bus connection, reducing the risk of loose contacts and ensuring long-term electrical integrity in busy equipment rooms.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e provides stable overload protection (thermal) and instantaneous short-circuit response (magnetic), delivering repeatable protection performance across varying loads and temperatures.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole, 350A, 600V rating\u003c\/strong\u003e—perfect for three-phase feeder circuits and substantial branch-circuit protection in commercial and light industrial panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSiemens OEM compatibility\u003c\/strong\u003e is designed to pair with matching Siemens load centers and panelboards, ensuring proper fit, labeling, and coordinated protection within an established system.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application\u003c\/strong\u003e suitable for residential, commercial, and light industrial panel applications where high ampacity and reliable short-circuit protection are required.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical use cases include serving as a main or large feeder breaker in three-phase panelboards, protecting heavy-load equipment, or providing robust protection for critical distribution circuits in commercial buildings. The bolt-on design combined with a thermal-magnetic trip curve helps minimize nuisance trips while maintaining fast response to dangerous faults, keeping downtime and cooling costs in check.\u003c\/p\u003e \u003cp\u003e\u003cstrongtechnical highlights\u003e\u003c\/strongtechnical\u003e\u003c\/p\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 HJXD63B350L\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 350A\u003c\/li\u003e \u003cstrong\u003e\u003cli\u003eVoltage Rating:\u003c\/li\u003e\u003c\/strong\u003e 600V \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 \u003cp\u003eWhy choose this breaker over alternatives? It’s engineered for seamless integration within Siemens panel ecosystems, offering a proven trip profile and a secure mounting method that maintains electrical continuity even in vibration-prone environments. For projects that demand reliable, high-capacity protection with straightforward serviceability, the HJXD63B350L from AmpState delivers peace of mind and performance you can trust.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46349810139298,"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_b358f5c9-d0b2-4382-b047-8693f8e55325.png?v=1764157463","url":"https:\/\/www.ampstate.com\/products\/siemens-hjxd63b350l-350a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}