{"product_id":"siemens-3se2120-1b-push-button-selector-switch","title":"Siemens 3SE2120-1B Push Button Selector Switch","description":"\u003cdiv\u003e\u003cp\u003eSiemens 3SE2120-1B is a metal-enclosed limit switch in the 3SE family designed for end‑of‑travel and position sensing in industrial automation. It uses snap‑action contacts configured as 1 normally open (NO) and 1 normally closed (NC), enabling straightforward PLC wiring and control logic. Built for rugged factory environments, the 3SE2120-1B is commonly applied in conveyors, machine tools, and automated equipment where reliable switching at travel limits is essential. As a member of the 3SE2120 family, this model aligns with other variants such as 3SE2120-1C and 3SE2120-1G, illustrating a family approach to actuation and environmental compatibility, while the metal‑enclosed construction protects the internal mechanism for repeatable operation in demanding applications requiring dependable end‑stop sensing. \u003c\/p\u003e\u003c\/div\u003e","brand":"SIEMENS","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":46268151169258,"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-3se2120-1b-push-button-selector-switch","provider":"GTG Hardware","version":"1.0","type":"link"}