{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SF3120-6XX00-0BA1","brand":"Siemens","brandSlug":"siemens","productSlug":"3SF3120-6XX00-0BA1","canonicalUrl":"https://aoctrl.com/siemens/3SF3120-6XX00-0BA1","factsUrl":"https://aoctrl.com/api/mcp/products/3SF3120-6XX00-0BA1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3SF3120-6XX00-0BA1, communication-capable position switch, metal block housing EN 50041, IP65, AS-i insulation displacement connection, 2 NC positive opening contacts, screw fixing.","salesMarkdown":"The Siemens 3SF3120-6XX00-0BA1 is a communication-capable position switch built for AS-i (Actuator-Sensor Interface) networks. It uses a mechanical active principle with a separate actuator and positive opening operation — meaning the NC contacts are mechanically forced open when the actuator is displaced, regardless of contact welding. That positive opening function makes it suitable for safety-related position detection in machine guarding and interlock circuits where a fail-safe signal is required. Screw fixing mounts it directly to machine frames or brackets. The switch carries 2 NC auxiliary contacts and no NO contacts — a pure normally-closed safety pair. ## AS-i connection and wiring reality Connection to the AS-i bus is via insulation displacement method — no screw terminals on the switch itself. The AS-i flat cable is pressed into the displacement contacts, which pierces the insulation to make contact with the conductors. This is a clean, vibration-resistant connection common on AS-i nodes, but it means the switch is dedicated to that bus protocol and cannot be rewired for conventional discrete I/O. The switch is supplied without an actuating element (separate actuator listed), so the mating cam or plunger must be sourced separately based on the application geometry.","metaTitle":"Siemens 3SF3120-6XX00-0BA1 AS-i Position Switch, IP65, Posit","metaDescription":"Siemens 3SF3120-6XX00-0BA1 communication-capable position switch with AS-i adapter. IP65 metal housing, 2NC positive opening contacts. Current lifecycle stage. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Safety Interlock Switches"],"specifications":{"lifecycle_stage":"current","Active Principle":"mechanical","Fastening Method":"screw fixing","Product Designation":"communication-capable position switch","protection class IP":"IP65","Design Of The Housing":"block, EN 50041","Coating Of The Enclosure":"painted","Material Of The Enclosure":"metal","Type Of Electrical Connection":"AS-i insulation displacement method","Design Of The Actuating Element":"separate actuator","Design Of The Switching Function":"positive opening","Product Function Positive Opening":"Yes","Ambient Temperature During Operation":"-25 ... +60 °C","reference code according to IEC 81346-2":"B","Design Of The Housing According To Standard":"Yes","number of NC contacts for auxiliary contacts":"2","number of NO contacts for auxiliary contacts":"0"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/3SF3120-6XX00-0BA1/alternatives.json"},"ai":{"faq":[{"question":"What is the 3SF3120-6XX00-0BA1 used for?","answer":"It is a communication-capable position switch for AS-i networks, used for position detection and safety interlocking in machine guarding applications where positive opening NC contacts are required."},{"question":"How is the 3SF3120-6XX00-0BA1 connected to the AS-i bus?","answer":"Connection is via AS-i insulation displacement method — the flat cable is pressed into the displacement contacts, piercing the insulation to make contact."},{"question":"Does the 3SF3120-6XX00-0BA1 come with an actuator?","answer":"No, it is supplied without an actuating element (separate actuator design). The mating cam or plunger must be sourced separately."},{"question":"Where can I buy the 3SF3120-6XX00-0BA1 and how is it quoted?","answer":"It is sourced and quoted to order through independent distribution against an RFQ. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3SF3120-6XX00-0BA1","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3SF3120-6XX00-0BA1 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}