{"product_id":"siemens-5sy63407-40a-3p-400v-circuit-breaker","title":"Siemens 5SY63407 40A 3P 400V Circuit Breaker | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eIntroducing the Siemens 5SY63407 40 A 3-Pole 400 V Circuit Breaker—a precision device engineered to deliver dependable overcurrent protection for panelboards, load centers, and electrical distribution systems. Built for reliability in commercial and industrial settings, it helps you protect wiring, minimize nuisance trips, and maintain steady power delivery across critical circuits.\u003c\/p\u003e \u003cp\u003eKey specifications you can trust:\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 5SY63407\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 40 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePoles:\u003c\/strong\u003e 3\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 400 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Circuit protection in panelboards, load centers, and electrical distribution systems\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAvailability:\u003c\/strong\u003e Available from AmpState\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eWhy this matters for retrofit and maintenance planning: choosing the exact part number ensures seamless compatibility with existing Siemens equipment, reducing downtime, avoiding unnecessary reconfiguration, and preserving original labeling and documentation. The 3-pole, 40 A design matches standard Siemens assemblies, making it a dependable choice when upgrading protection in established electrical infrastructure.\u003c\/p\u003e \u003cp\u003eIdeal use cases you’ll appreciate:\u003c\/p\u003e\n\u003cul\u003e \u003cli\u003eRetrofit projects where maintaining the original part number is critical for fit and documentation\u003c\/li\u003e \u003cli\u003eOngoing maintenance programs for panelboards and distribution centers that rely on consistent Siemens components\u003c\/li\u003e \u003cli\u003eStrategic spare-part planning to shorten future outage windows and keep facilities running smoothly\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eNot sure about compatibility? Our team is ready to assist with compatibility checks and part-number confirmation to streamline your procurement and installation process.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46412995559586,"sku":"5SY63407","price":583.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_83963f7f-600e-419f-90c6-e7677089642b.png?v=1765492973","url":"https:\/\/www.ampstate.com\/products\/siemens-5sy63407-40a-3p-400v-circuit-breaker","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}