{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SF5811-2AB08","brand":"Siemens","brandSlug":"siemens","productSlug":"3SF5811-2AB08","canonicalUrl":"https://aoctrl.com/siemens/3SF5811-2AB08","factsUrl":"https://aoctrl.com/api/mcp/products/3SF5811-2AB08","rawCanonicalId":null},"summary":{"shortDescription":"Siemens AS-Interface emergency-stop slave, 22 mm mounting, IP67, 30 V DC, F slave 2I, metal enclosure, rotate-to-unlatch.","salesMarkdown":"The Siemens 3SF5811-2AB08 is an AS-Interface emergency-stop slave — a safety-rated E-STOP pushbutton with integrated AS-i communication. It is designed for floor-mounting in industrial control panels or machines where a hardwired emergency-stop function needs to report its status over the AS-i bus. The actuating element is a red mushroom pushbutton with a rotate-to-unlatch mechanism, meaning the operator must twist the button to release it after a stop. Positive opening is confirmed, so the NC contacts are mechanically forced open when the button is pressed — no spring reliance. Rated for 30 V DC on the AS-i bus, which is standard for AS-Interface systems. The slave type is F slave, 2I — this is a safety slave with two inputs, typically used to monitor the E-stop contacts and any additional feedback (e.g., contactor auxiliary). IP67 protection class means the enclosure and pushbutton are sealed against dust ingress and temporary immersion — suited for washdown environments, food processing, or outdoor installations where hose-down cleaning is routine. The 22 mm mounting diameter fits standard industrial control panel cutouts. The square metal enclosure (85 x 85 x 114 mm) provides rugged mechanical protection and is fastened vertically or horizontally.","metaTitle":"Siemens 3SF5811-2AB08 AS-Interface E-Stop, 22mm, IP67","metaDescription":"Siemens 3SF5811-2AB08 AS-Interface emergency-stop slave with 22mm mushroom pushbutton, IP67, 30 V DC. Current lifecycle stage: active. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Safety Interlock Switches"],"specifications":{"Depth":"114 mm","Width":"85 mm","Height":"85 mm","During Storage":"-40 ... +80 °C","of AS-i slaves":"Floor mounting","lifecycle_stage":"current","During Operation":"-25 ... +70 °C","Number Of Labels":"0","Positive Opening":"Yes","Product Function":"EMERGENCY-STOP","Mounting Diameter":"22 mm","at DC rated value":"30 V","protection class IP":"IP67","Design Of The Housing":"AS-Interface enclosure with standard equipment","Number Of Lampholders":"0","number of AS-i slaves":"1","EMERGENCY OFF function":"Yes","Material Of The Holder":"Metal","EMERGENCY STOP function":"Yes","Design Of The Slave Type":"F slave, 2I","Number Of Backing Plates":"0","Number Of Command Points":"1","Type Of Unlocking Device":"rotate-to-unlatch mechanism","Material Of The Enclosure":"metal","Number Of Switching Elements":"2","Product Component Front Ring":"No","Shape Of The Enclosure Front":"Square","Substance Prohibitance (Date)":"05/28/2009","Color Of The Actuating Element":"red","Product Component Light Source":"No","Color Of The Enclosure Top Part":"yellow","Design Of The Actuating Element":"EMERGENCY STOP mushroom pushbutton","Fastening Method Of The Enclosure":"Vertical / horizontal","Material Of The Actuating Element":"plastic","Shape Of The Installation Opening":"round","Product Component Protective Collar":"Yes","Product Extension Optional Light Source":"No","reference code according to IEC 81346-2":"S","Type Of Voltage Of The Operating Voltage":"DC","Delivery State Pre-Wired On Strip Terminal":"Yes","Of Contact Blocks, Socket, And Accessories":"Floor mounting","Type Of Electrical Connection On Enclosure":"With insulation-displacement terminal, top","with low demand rate according to SN 31920":"20 %","with high demand rate according to SN 31920":"20 %","number of CO contacts for auxiliary contacts":"0","number of NC contacts for auxiliary contacts":"2","number of NO contacts for auxiliary contacts":"0","Tightening Torque Of The Screws In The Bracket":"1.4 ... 1.6 N·m","vibration resistance according to IEC 60068-2-6":"20 ... 200 Hz: 5g"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/3SF5811-2AB08/alternatives.json"},"ai":{"faq":[{"question":"What is the IP rating and what does it mean for washdown environments?","answer":"IP67 — dust-tight and protected against temporary immersion. Suitable for washdown areas, but not rated for continuous submersion or high-pressure steam cleaning."},{"question":"What is the mounting diameter and enclosure material?","answer":"22 mm mounting diameter. The enclosure is metal (square, yellow top part), the actuator is red plastic. The holder is metal."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3SF5811-2AB08","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/3SF5811-2AB08 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}}