{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SF3120-8GW00-0BA1","brand":"Siemens","brandSlug":"siemens","productSlug":"3SF3120-8GW00-0BA1","canonicalUrl":"https://aoctrl.com/siemens/3SF3120-8GW00-0BA1","factsUrl":"https://aoctrl.com/api/mcp/products/3SF3120-8GW00-0BA1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3SF3120-8GW00-0BA1 communication-capable position switch, AS-i adapter, 2NC, positive opening, IP65, metal block housing EN 50041, twist lever actuator, screw fixing.","salesMarkdown":"The Siemens 3SF3120-8GW00-0BA1 is a communication-capable position switch with an integrated AS-i adapter, built for direct connection to an AS-Interface network without a separate I/O module. Its mechanical active principle and positive opening switching function (EN 60947-5-1) mean the NC contacts are forced open by the actuator — a requirement for safety-related stop circuits where the switch must break the circuit even if contacts weld. The twist lever actuator (10° to 10° operating angle) suits cam-actuated or sliding-door positions on packaging machines, conveyors, or transfer lines. The metal block housing (EN 50041 design A) is painted and screw-fixed, giving it the mechanical robustness for high-cycle applications on machine tools or heavy automation. Two normally-closed (NC) auxiliary contacts (no NO contacts) make this switch a dedicated safety input: it signals the safety PLC or AS-i safety monitor when the guard is open, and the positive opening mechanism guarantees the signal even under contact weld. ## AS-i connection and wiring The electrical connection uses AS-i insulation displacement method — the switch pierces the AS-i flat cable directly, no separate tee or junction needed. This simplifies daisy-chaining multiple switches along a line; just lay the AS-i cable through the housing and clamp. Screw fixing to the machine frame or bracket is standard; the housing profile matches EN 50041 block dimensions, so it drops into existing cutouts or brackets designed for that standard.","metaTitle":"Siemens 3SF3120-8GW00-0BA1 Position Switch, AS-i, 2NC, IP65","metaDescription":"Siemens 3SF3120-8GW00-0BA1 communication-capable position switch with AS-i adapter, 2NC contacts, positive opening, IP65, metal block housing EN 50041. Active lifecycle. Available","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":"twist lever","Design Of The Switching Function":"positive opening","Standard-Compliant Actuator Head":"EN 50041, design A","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/3SF3120-8GW00-0BA1/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3SF3120-8GW00-0BA1?","answer":"The peer contactors 3RT5076-6AR36, 3RT5056-6AM36, and 3RT5065-6AB36 are power contactors in the SIRIUS family, not position switches — they do not share the same form factor, actuator, or AS-i communication capability. No direct form-fit-function second-source exists for this AS-i position switch; the 3SF3120-8GW00-0BA1 is a dedicated safety position switch with positive opening and AS-i interface, not a contactor."},{"question":"What compliance documentation does Siemens provide for 3SF3120-8GW00-0BA1?","answer":"The evidence does not list specific compliance certificates (RoHS, REACH, UL, IEC) for this order code. Standard Siemens position switches in this series typically carry CE marking and are designed to EN 60947-5-1; verify the specific declaration with your Siemens contact or the product datasheet."},{"question":"Where can I buy 3SF3120-8GW00-0BA1 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm offer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3SF3120-8GW00-0BA1","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/3SF3120-8GW00-0BA1 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}}