{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SF1234-1QV40-1BA1","brand":"Siemens","brandSlug":"siemens","productSlug":"3SF1234-1QV40-1BA1","canonicalUrl":"https://aoctrl.com/siemens/3SF1234-1QV40-1BA1","factsUrl":"https://aoctrl.com/api/mcp/products/3SF1234-1QV40-1BA1","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS mechanical safety switch, 3SF1234-1QV40-1BA1, block plastic housing, IP65, 24 V LED, M12 plug, 2 NC positive-opening contacts, AS-Interface slave profile 0.B.F.","salesMarkdown":"## Safety switch with integrated AS-Interface and LED indication The Siemens 3SF1234-1QV40-1BA1 is a SIRIUS mechanical safety switch designed for guard-door and hazard-zone monitoring. It carries two normally-closed positive-opening safety contacts and communicates over AS-Interface with slave profile 0.B.F. The 24 V LED gives a quick visual on supply and actuator status — saves time during a midnight startup when you're tracing a missing safety chain. ## IP65 enclosure and mounting flexibility Rated IP65, so it handles washdown and dusty environments on packaging or food lines. The block plastic housing mounts with screw fixing in any orientation. Width is 31 mm — fits a standard DIN-rail footprint if you use an adapter plate; the M12 fixed plug keeps wiring clean and tool-free.","metaTitle":"Siemens 3SF1234-1QV40-1BA1 SIRIUS Safety Switch, 24 V LED, I","metaDescription":"Siemens 3SF1234-1QV40-1BA1 SIRIUS safety switch with 24 V LED, IP65, positive opening contacts, 2 NC. Current lifecycle stage. Available to order — request RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Safety Interlock Switches"],"specifications":{"of LED":"24 V","ID1 code":"F (hex, variable 0...F)","During Storage":"-40 ... +80 °C","Repeat Accuracy":"0.1 mm","lifecycle_stage":"current","Active Principle":"mechanical","During Operation":"-25 ... +60 °C","Fastening Method":"screw fixing","Circuit Principle":"slow-action contacts","Mounting Position":"any","Product Brand Name":"SIRIUS","Degree Of Pollution":"class 3","Product Designation":"Mechanical safety switches","Width Of The Sensor":"31 mm","protection class IP":"IP65","Length Of The Sensor":"118 mm","Design Of The Housing":"block, narrow","Material Of The Enclosure":"plastic","Of The Optional Actuators":"3SE5000-0AV01 standard actuator, 3SE5000-0AV02 actuator with vertical fixing, 3SE5000-0AV03 actuator with transverse fixing, 3SE5000-0AV04 radius actuator left, 3SE5000-0AV05 universal actuator, 3SE5000-0AV06 radius actuator right","AS-Interface slave profile":"0.B.F","Design Of Plug-In Connection":"M12 plug, 4-pole: Pin 1 = ASI+ , Pin 2 = not assigned, Pin 3= ASI-, Pin 4 = not assigned","Substance Prohibitance (Date)":"03/01/2017","Type Of Electrical Connection":"M12 plug, fixed, 4-pole","Insulation Voltage Rated Value":"30 V","Design Of The Actuating Element":"without","Design Of The Switching Contact":"mechanical","Design Of The Switching Function":"positive opening","Product Function Positive Opening":"Yes","Suitability For Use Safety Switch":"Yes","Surge Voltage Resistance Rated Value":"0.8 kV","reference code according to IEC 81346-2":"B","Design Of The Housing According To Standard":"Yes","Number Of Switching Contacts Safety-Related":"2","Material Of The Enclosure Of The Switch Head":"plastic enclosure","number of NC contacts for auxiliary contacts":"2","number of NO contacts for auxiliary contacts":"0","shock resistance according to IEC 60068-2-27":"30g / 11 ms","vibration resistance according to IEC 60068-2-6":"0.35 mm/5g","Mechanical Service Life (Operating Cycles) Typical":"1 000 000","Minimum Actuating Force In Directions Of Actuation":"20 N","Design Of The Interface For Safety-Related Communication":"ASIsafe via M12 plug","type of voltage of the supply voltage of the optional LED display":"DC"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/3SF1234-1QV40-1BA1/alternatives.json"},"ai":{"faq":[{"question":"What is the supply voltage for the LED on 3SF1234-1QV40-1BA1?","answer":"The integrated LED is rated for 24 V. It lights when the actuator is present and the safety contacts are closed — a quick visual check that the guard door is locked and the AS-Interface bus is powered."},{"question":"What is the AS-Interface slave profile for this safety switch?","answer":"The AS-Interface slave profile is 0.B.F. This is a standard safety slave profile used with ASIsafe masters; it transmits the state of the two NC safety contacts over the yellow AS-i cable."},{"question":"Where can I buy 3SF1234-1QV40-1BA1 and what is the lead time?","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 lead time and price."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3SF1234-1QV40-1BA1","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/3SF1234-1QV40-1BA1 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}}