{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SF3120-6FV00-0BA1","brand":"Siemens","brandSlug":"siemens","productSlug":"3SF3120-6FV00-0BA1","canonicalUrl":"https://aoctrl.com/siemens/3SF3120-6FV00-0BA1","factsUrl":"https://aoctrl.com/api/mcp/products/3SF3120-6FV00-0BA1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3SF3120-6FV00-0BA1 communication-capable position switch, mechanical positive opening, AS-i insulation displacement connection, 2 NC contacts, angular roller lever, metal block housing EN 50041, IP65, screw fixing.","salesMarkdown":"The Siemens 3SF3120-6FV00-0BA1 is a communication-capable position switch with an integrated AS-i adapter, designed for direct connection to an AS-interface network without a separate I/O module. It uses a mechanical positive-opening switching function with 2 NC contacts, meaning the normally-closed circuit physically breaks open when the actuator is depressed — a requirement for safety-related stop circuits where the switch must reliably interrupt power even if contacts weld. The angular roller lever actuator suits cam-actuated linear or rotary motion detection on conveyors, transfer lines, or machine guarding gates. IP65 protection means the metal housing is dust-tight and protected against water jets from any direction — suitable for washdown areas in food processing or wet machining environments, though not for continuous immersion. The block housing conforms to EN 50041, a standard 40 mm wide format that fits standard limit-switch mounting patterns; screw fixing secures it to machine frames or brackets. The AS-i insulation displacement connection eliminates terminal screw tightening — the cable is pressed into a slot that pierces the insulation, which saves wiring time but requires the correct AS-i profile cable (yellow flat cable). No successor or phase-out notice is on record. The AS-i interface is a fixed feature — there is no non-communicating variant of this exact switch, so if the line uses a different fieldbus (PROFIBUS, EtherNet/IP), this part will not drop in without an AS-i gateway. The positive-opening function is the key safety feature: per IEC 60947-5-1, the NC contacts are mechanically forced open when the roller lever is actuated, regardless of whether the contacts have welded. This makes the switch suitable for use in safety circuits up to the limits of the connected safety relay or PLC — it is not a safety-rated device itself (no SIL/PL claim in the evidence), but the positive-opening contacts satisfy the basic stop-category requirements for many machine-guarding applications. The 2 NC contacts provide redundancy or allow one contact for the safety circuit and one for the PLC status input.","metaTitle":"Siemens 3SF3120-6FV00-0BA1 Position Switch, AS-i, 2NC, IP65","metaDescription":"Siemens 3SF3120-6FV00-0BA1 communication-capable position switch with AS-i adapter, 2NC positive opening contacts, IP65 metal housing, angular roller lever. Lifecycle stage: curren","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":"angular roller lever","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/3SF3120-6FV00-0BA1/alternatives.json"},"ai":{"faq":[{"question":"What does the positive-opening function mean on this switch?","answer":"Positive opening means the NC contacts are mechanically forced open when the actuator is depressed, even if the contacts have welded shut. This is a safety requirement per IEC 60947-5-1 for circuits that must reliably interrupt power during a stop command."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3SF3120-6FV00-0BA1","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/3SF3120-6FV00-0BA1 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}}