{"product_id":"siemens-3sb3-647-0aa21-illuminated-push-button","title":"Siemens 3SB3 647-0AA21 Illuminated Push Button","description":"\u003cdiv\u003e\u003cp\u003eSiemens 3SB3 647-0AA21 Illuminated Red Pushbutton is a 22 mm metal round complete unit with a flat red lens and integrated LED, designed for durable panel control in industrial environments. Configured as a momentary pushbutton with dual contacts (1NO+1NC) and a screw-terminal connection, it is supplied for 24 V AC\/DC and ships with a mounting holder for quick panel installation. This unit is part of Siemens' Sirius 3SB3 family, used for signaling and control in control cabinets and machine interfaces; the family includes illuminated pushbuttons and indicator lights. The built-in red indicator provides immediate visual feedback of status, reducing the need for separate pilot lighting while the flat button profile supports compact front-panel layouts. Its 1NO+1NC configuration supports simple start\/stop or status-monitoring applications, and the 22 mm metal construction with a screw-terminal wiring method is intended for dependable, field-installable operation. \u003c\/p\u003e\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"New","offer_id":46268145205482,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/8039\/3450\/files\/GTG-STOCK-017.png?v=1788727429","url":"https:\/\/gtghardware.com\/products\/siemens-3sb3-647-0aa21-illuminated-push-button","provider":"GTG Hardware","version":"1.0","type":"link"}