{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SF5811-2AC10","brand":"Siemens","brandSlug":"siemens","productSlug":"3SF5811-2AC10","canonicalUrl":"https://aoctrl.com/siemens/3SF5811-2AC10","factsUrl":"https://aoctrl.com/api/mcp/products/3SF5811-2AC10","rawCanonicalId":null},"summary":{"shortDescription":"Siemens AS-Interface emergency stop, 3SF5811-2AC10, 22 mm mounting diameter, IP67, rotate-to-unlatch, 26.5–31.5 V DC.","salesMarkdown":"The Siemens 3SF5811-2AC10 is an AS-Interface emergency stop pushbutton with a 22 mm mounting diameter, rated for 26.5–31.5 V DC. It uses a rotate-to-unlatch mechanism and provides positive opening of the contacts — meaning the NC contacts are mechanically forced open when the actuator is pressed, even if they weld shut. That's the core safety function: it guarantees the circuit breaks under fault conditions. ## IP67 and washdown duty Rated IP67, so the housing and actuator seal against dust ingress and temporary immersion. That makes this unit suitable for food-and-bev washdown zones, outdoor conveyor lines, or any area where hose-down cleaning is routine. The metal enclosure and metal holder add mechanical robustness for high-vibration environments — tested to 5g at 20–200 Hz per IEC 60068-2-6.","metaTitle":"Siemens 3SF5811-2AC10 Emergency Stop, 22 mm, IP67, Active","metaDescription":"Siemens 3SF5811-2AC10 AS-Interface emergency stop pushbutton. 22 mm mounting, IP67, rotate-to-unlatch. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Safety Interlock Switches"],"specifications":{"Depth":"65 mm","Width":"85 mm","Height":"85 mm","Rated Value":"26.5 ... 31.5 V","Light source":"No","During Storage":"-40 ... +80 °C","of AS-i slaves":"Floor mounting","lifecycle_stage":"current","During Operation":"-25 ... +70 °C","Number of labels":"2","Positive Opening":"Yes","Product function":"EMERGENCY-STOP","Mounting diameter":"22 mm","Protective Collar":"No","at DC rated value":"30 V","Color of the label":"Black","Protection class IP":"IP67","Design of the housing":"AS-Interface enclosure with standard equipment","Number of lampholders":"0","acc. to IEC 60068-2-6":"20 ... 200 Hz: 5g","EMERGENCY OFF function":"Yes","For Auxiliary Contacts":"0","Material of the holder":"Metal","EMERGENCY STOP function":"Yes","Number of backing plates":"0","Number of command points":"1","Of The Actuating Element":"red","Of The Operating Voltage":"DC","Type of unlocking device":"rotate-to-unlatch mechanism","Material of the enclosure":"metal","Pre-Wired On Strip Terminal":"Yes","Number of switching elements":"2","Of Top Part Of The Enclosure":"grey","Product component front ring":"No","Shape of the enclosure front":"Square","Mounting type of the enclosure":"Vertical","Design of the operating mechanism":"Emergency stop mushroom pushbutton","Material of the actuating element":"plastic","Shape of the installation opening":"round","Reference code acc. to DIN EN 61346-2":"S","Reference code acc. to DIN EN 81346-2":"S","with low demand rate acc. to SN 31920":"100 FIT","with high demand rate acc. to SN 31920":"20 %","Product extension optional Light source":"No","Of Contact Blocks, Socket, And Accessories":"Floor mounting","Type of electrical connection on enclosure":"M12 connector, 4-pole, top","Number of NC contacts for auxiliary contacts":"2","Number of NO contacts for auxiliary contacts":"0","Marking of the name plate for command devices":"NOT-HALT","Tightening torque of the screws in the bracket":"1 N·m"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/3SF5811-2AC10/alternatives.json"},"ai":{"faq":[{"question":"What is the 3SF5811-2AC10 used for?","answer":"It is an AS-Interface emergency stop pushbutton used to provide a safety-rated stop function in industrial machinery, conveyors, and automated lines. The positive opening contacts ensure the circuit breaks even if contacts weld."},{"question":"What is the mounting diameter and protection class?","answer":"22 mm mounting diameter, IP67 rated — suitable for washdown environments and outdoor use."},{"question":"Where can I buy 3SF5811-2AC10?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. 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/3SF5811-2AC10","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/3SF5811-2AC10 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}}