{"product_id":"siemens-md63b500-circuit-breaker","title":"Siemens | MD63B500 | Circuit Breaker | 500A | 3-Pole | 600V","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Siemens MD63B500 Circuit Breaker — a purpose-built protection device designed for demanding industrial power systems. With a 500A rating, 3-pole configuration, and a 600V operating range, this breaker delivers reliable, coordinated protection for critical electrical infrastructure, including main disconnects and motor circuits.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eExact interchangeability\u003c\/strong\u003e: The part number MD63B500 is your best reference for compatibility, making maintenance, retrofit, and replacement orderly and straightforward within Siemens-installed panels and compliant systems.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRobust 500A capability\u003c\/strong\u003e: Engineered to support heavy-load configurations, this breaker protects conductors and equipment by interrupting excess current before damage can occur.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3-pole protection\u003c\/strong\u003e: Ensures balanced, multi-phase protection across all lines, promoting safer shutdowns and reducing the risk of phase-to-phase faults.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e600V system readiness\u003c\/strong\u003e: Suitable for industrial distribution environments where higher-voltage protection is required, providing dependable performance in demanding settings.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eIdeal use cases:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eMaintenance and service of existing Siemens installations that require the MD63B500 model for continued protection integrity.\u003c\/li\u003e \u003cli\u003eRetrofit projects where upgrading to current protection standards is necessary without changing bus or panel configurations.\u003c\/li\u003e \u003cli\u003eReplacement for failed units in 3-pole, 600V systems to minimize downtime and restore reliable protection quickly.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eKey considerations to ensure a smooth fit:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eAlways confirm fit and ratings before ordering; rely on the MD63B500 part number to verify compatibility with your equipment.\u003c\/li\u003e \u003cli\u003eEnsure your panel or switchgear is rated for 600V and supports a 3-pole protection device of this size and configuration.\u003c\/li\u003e \u003cli\u003eFollow applicable electrical safety standards during installation and conduct routine maintenance checks to sustain performance.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhat you gain with this Siemens MD63B500:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eConsistent protection for circuits carrying up to 500A, helping safeguard wiring, transformers, and connected machinery.\u003c\/li\u003e \u003cli\u003eReliable, predictable operation across all three phases, contributing to safer fault response and system uptime.\u003c\/li\u003e \u003cli\u003eLong-term availability and support within the Siemens MD63 family, simplifying spare parts management and ongoing maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Default Title","offer_id":46425632047266,"sku":"MD63B500","price":14483.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_a085eff1-75dd-47ee-b131-4c8df8f0489b.png?v=1765492976","url":"https:\/\/www.ampstate.com\/products\/siemens-md63b500-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}