{"product_id":"siemens-3va99780aa12-3a-300v-switch","title":"Siemens 3VA99780AA12 3A 300V Switch, Auxiliary Switch | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eSiemens 3VA99780AA12 Auxiliary Switch is built for everyday electrical work, delivering reliable manual control and precise switching in compact control panels. With a 3 A current rating at 300 V, this auxiliary contact provides clear signaling and dependable operation where it matters most in panel setups, maintenance tasks, and repair rounds.\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 3VA99780AA12\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Auxiliary Switch\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmperage:\u003c\/strong\u003e 3 A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 300 V\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eApplications:\u003c\/strong\u003e Manual control, switching functions, control-panel signaling\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhat makes this auxiliary switch stand out\u003c\/h3\u003e\n\u003cp\u003eIn environments where a direct part-number match matters for sourcing, stocking, and quick replacement, the 3VA99780AA12 from Siemens delivers a precise fit with predictable performance. Its dedicated auxiliary function supports status indication and control signaling without imposing on the main circuit, helping you keep critical systems transparent and responsive.\u003c\/p\u003e \u003ch3\u003eIdeal use cases\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaintenance crews updating or repairing control panels where a dedicated auxiliary contact is required\u003c\/li\u003e \u003cli\u003ePanel builders integrating signaling for PLC inputs, interlocks, or indicator circuits\u003c\/li\u003e \u003cli\u003eSpare inventory for service fleets that rely on exact part numbers for rapid replacements\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWhy it matters for your project\u003c\/h3\u003e\n\u003cp\u003eHaving the right auxiliary switch reduces downtime and simplifies ordering. The Siemens 3VA99780AA12 provides a stable, trustworthy control signal in a compact form, making it a practical choice for panel-level automation, motor control centers, and distributed control systems that need reliable auxiliary feedback.\u003c\/p\u003e \u003ch3\u003eCompatibility and support\u003c\/h3\u003e\n\u003cp\u003eAvailable from AmpState, this part is designed for straightforward direct-part-number replacement in compatible Siemens installations. If you’re unsure about fit, AmpState can help confirm compatibility and ensure you’ve chosen the exact auxiliary switch your system requires. Need help matching a part number or confirming compatibility? Message us and we’ll help you confirm fit.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46411029020834,"sku":"3VA99780AA12","price":10.0,"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-3va99780aa12-3a-300v-switch","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}