{"product_id":"siemens-3va9978-0aa22-3a-switch","title":"Siemens 3VA9978-0AA22 3A Switch, Auxiliary Switch | AmpState","description":"\u003cdiv\u003e\n\u003cp\u003eMeet the Siemens \u003cstrong\u003e3VA9978-0AA22\u003c\/strong\u003e — a compact \u003cem\u003e3A\u003c\/em\u003e switch designed as an auxiliary switch for reliable manual control and switching functions in industrial control panels. Built for environments where a direct part-number match matters, this unit ensures seamless integration with Siemens automation ecosystems and minimizes downtime during replacements.\u003c\/p\u003e \u003ch3\u003eWhy this auxiliary switch stands out\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eExact part-number fit\u003c\/strong\u003e: 3VA9978-0AA22 is purpose-built to drop into Siemens control setups, streamlining ordering, stocking, and repairs for maintenance teams and panel builders.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003e3 A switching capability\u003c\/strong\u003e: Ideal for low-power control circuits, signaling, and manual overrides without overloading the circuit.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eReliable manual control\u003c\/strong\u003e: A straightforward auxiliary switch that provides immediate operator interface for on\/off signaling and interlock scenarios.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eLow-friction replacement\u003c\/strong\u003e: Great for spare inventories—reduces search time and ensures quick swaps when service windows are tight.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eAmpState availability\u003c\/strong\u003e: Easily purchased through AmpState, with assistance available to confirm compatibility and fitment if needed.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eWho should consider this part\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eMaintenance teams stocking essential Siemens accessories for fast repairs.\u003c\/li\u003e \u003cli\u003ePanel builders seeking components with exact part-number compatibility to ensure repeatable builds.\u003c\/li\u003e \u003cli\u003ePlant engineers needing dependable auxiliary signaling for control logic and manual override functions.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003ePractical applications and scenarios\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eManual control overrides in Siemens-based control panels where a quick, tactile switch is required.\u003c\/li\u003e \u003cli\u003eAuxiliary signaling to PLCs or control relays to convey a specific status or interlock condition.\u003c\/li\u003e \u003cli\u003eReplacement in aging assemblies where the original auxiliary contact block is worn or out of spec.\u003c\/li\u003e\n\u003c\/ul\u003e \u003ch3\u003eHow it fits into your procurement and maintenance strategy\u003c\/h3\u003e\n\u003cp\u003eChoosing a direct part-number match like the \u003cstrong\u003e3VA9978-0AA22\u003c\/strong\u003e reduces the risk of fit issues, wiring mismatches, and compatibility surprises during maintenance outages. It keeps your spare inventory lean while ensuring you can perform precise, quick swaps that maintain process uptime.\u003c\/p\u003e \u003ch3\u003eNeed help confirming compatibility?\u003c\/h3\u003e\n\u003cp\u003eWe can help verify fitment against your Siemens equipment. \u003cstrong\u003eMessage us\u003c\/strong\u003e for guidance on part-number matching and compatibility checks to ensure a seamless replacement in your control panel.\u003c\/p\u003e \u003ch3\u003eSpecifications at a glance\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003eManufacturer: Siemens\u003c\/li\u003e \u003cli\u003ePart Number: 3VA9978-0AA22\u003c\/li\u003e \u003cli\u003eProduct Type: Switch (Auxiliary Switch)\u003c\/li\u003e \u003cli\u003eAmperage: 3 A\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"AmpState","offers":[{"title":"Default Title","offer_id":46413700759714,"sku":"3VA9978-0AA22","price":575.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/8094\/6850\/files\/master_generic_513d6710-3734-4b27-839d-f68e6f4b470a.png?v=1765492974","url":"https:\/\/www.ampstate.com\/products\/siemens-3va9978-0aa22-3a-switch","provider":"Ampstate Electric Corporation","version":"1.0","type":"link"}