{"product_id":"siemens-lxd63b450h-450a-600v-3-pole-bolt-on-circuit-breaker","title":"Siemens LXD63B450H - 450 A, 600 V, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003eSiemens LXD63B450H is a 450A, 600V, 3-pole bolt-on molded case circuit breaker designed to deliver dependable branch circuit protection in panelboards and load centers. Built to endure demanding installations, this unit combines robust physical mounting with precise protection, making it a solid choice for commercial and light industrial applications. \u003ch2\u003eWhy this breaker stands out\u003c\/h2\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eBolt-on mounting for a secure, vibration-resistant connection\u003c\/strong\u003e: The bolt-on design creates a rigid link to the bus bars, reducing the risk of loose contacts in panels that experience vibration or movement.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit for reliable protection\u003c\/strong\u003e: The combination of thermal (overcurrent) and magnetic (short-circuit) tripping delivers stable, repeatable protection curves and faster response to faults.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible with Siemens panelboards and load centers\u003c\/strong\u003e: Engineered to align with Siemens’ own equipment, ensuring consistent trip characteristics and straightforward installation without adapters.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-phase protection for balanced distribution\u003c\/strong\u003e: The 3-pole design is ideal for three-phase electrical systems common in commercial and light industrial settings.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-current, high-voltage capability\u003c\/strong\u003e: With a 450A rating and a 600V rating, it is well-suited for feeders and main distribution routes in mid-sized panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVersatile application scope\u003c\/strong\u003e: Suitable for residential, commercial, and light industrial panel configurations where robust branch-circuit overcurrent and short-circuit protection is needed.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eKey specifications\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 LXD63B450H\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 450A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage rating:\u003c\/strong\u003e 600V\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 cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eProtect three-phase distribution feeders in commercial panelboards and load centers.\u003c\/li\u003e \u003cli\u003eUpgrade or replace aging protection in Siemens-compatible panels to improve reliability and fault response.\u003c\/li\u003e \u003cli\u003eInstall in light industrial equipment racks where vibration resistance and secure bus connections are priorities.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eInstallation and practical considerations\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eEnsure compatibility with your Siemens OEM panelboard or load center to maintain coordinated protection and trip characteristics.\u003c\/li\u003e \u003cli\u003eUse the bolt-on terminals as intended to achieve a solid bus connection; verify bus bar alignment before tightening.\u003c\/li\u003e \u003cli\u003eFollow your panel manufacturer’s torque specifications and local electrical codes during installation.\u003c\/li\u003e \u003cli\u003eIdeal for environments where panel vibration or movement could otherwise compromise connection integrity.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eWhat problems this solves\u003c\/strong\u003e — you’re getting a rugged, three-phase protection device that stays secure under vibration, responds quickly to short circuits, and coordinates smoothly with Siemens panel ecosystems. It minimizes nuisance trips caused by loose connections and ensures reliable disconnection during fault events, helping protect wiring, motors, and downstream devices.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355132219554,"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_4844b486-cd4e-4365-b093-4375332b9a82.png?v=1764689468","url":"https:\/\/www.ampstate.com\/products\/siemens-lxd63b450h-450a-600v-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}