{"product_id":"siemens-mxd63b500-500a-3-pole-bolt-on-circuit-breaker","title":"Siemens MXD63B500 - 500 A, 3-Pole Bolt-On Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eSiemens MXD63B500 is a heavy-duty 500 A, 3-pole bolt-on molded case circuit breaker engineered for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Built for reliability in demanding electrical environments, this device combines rugged mounting with precise protection to keep systems safe and operational.\u003c\/p\u003e \u003cp\u003eWhy this breaker stands out for real-world installations\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSecure bolt-on mounting\u003c\/strong\u003e provides a rigid, vibration-resistant bus connection that stays tight under real-world conditions, reducing wear and maintaining consistent electrical performance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThermal-magnetic trip unit\u003c\/strong\u003e delivers stable, repeatable protection by responding appropriately to both sustained overloads and sudden short circuits, helping minimize nuisance trips and downtime.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHigh-current capability\u003c\/strong\u003e with a 500 A rating is ideal for main feeders or heavy-duty sub-feed protection in larger residential, commercial, and light industrial panels.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eOEM-compatible design\u003c\/strong\u003e is made to integrate smoothly with matching Siemens load centers and other compatible panelboards, ensuring a clean, unified protection solution.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eThree-pole configuration\u003c\/strong\u003e supports 3-phase systems or common-trip protection for three conductors, simplifying wiring and safety compliance in three-phase layouts.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eTechnical snapshot\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eManufacturer\u003c\/strong\u003e: Siemens\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePart Number\u003c\/strong\u003e: MXD63B500\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eType\u003c\/strong\u003e: Thermal-magnetic molded case circuit breaker (MCCB)\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage\u003c\/strong\u003e: 500 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles\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\u003eIdeal use scenarios\u003c\/p\u003e \u003cul\u003e \u003cli\u003eMain feeders in residential developments where a robust, single-point protection is required for upgraded electrical services\u003c\/li\u003e \u003cli\u003eCommercial spaces with high-current 3-phase circuits needing reliable protection to keep lights, HVAC, and equipment running smoothly\u003c\/li\u003e \u003cli\u003eLight industrial panels that demand strong, vibration-resistant connections and precise trip coordination\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003ePractical guidance for optimal performance\u003c\/p\u003e \u003cul\u003e \u003cli\u003ePair this breaker with Siemens OEM load centers or compatible panelboards to ensure coordinated protection and consistent electrical characteristics.\u003c\/li\u003e \u003cli\u003eVerify panel compatibility and torque requirements during installation to maximize the durability of the bolt-on connection.\u003c\/li\u003e \u003cli\u003eConsider the thermal-magnetic trip behavior in your environment—its stable response helps prevent unnecessary trips in area with fluctuating loads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Amp State","offers":[{"title":"Default Title","offer_id":46355134251170,"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_d9897730-4349-4732-894f-1217e03ee458.png?v=1764689512","url":"https:\/\/www.ampstate.com\/products\/siemens-mxd63b500-500a-3-pole-bolt-on-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}