{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3TK2845-1FB41","brand":"Siemens","brandSlug":"siemens","productSlug":"3TK2845-1FB41","canonicalUrl":"https://aoctrl.com/siemens/3TK2845-1FB41","factsUrl":"https://aoctrl.com/api/mcp/products/3TK2845-1FB41","rawCanonicalId":null},"summary":{"shortDescription":"!!! Phased-out product!!! The successor product series is 3SK2 (see FAQ 109747906) SIRIUS safety relay with relay and electronic 24 V DC, 45 mm Screw terminal EC instantaneous: 2 NO EC delayed: 1 SC: 1 Spring-locked tumbler Basic device Maximum achievable PL according to EN 13849-1: e Maximum achievable SIL according to IEC 61508: 3","salesMarkdown":null,"metaTitle":null,"metaDescription":null,"metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Safety Relays"],"specifications":{"Depth":"88 mm","Solid":"2x (20 ... 14)","Width":"45 mm","at DC":"0.85 ... 1.15","Height":"138.5 mm","Maximum":"30 ms","Typical":"25 ms","at 24 V":"1 A","Stranded":"2x (20 ... 14)","at 115 V":"3 A","at 230 V":"3 A","Start Input":"Yes","UL approval":"Yes","Safety Switch":"Yes","at DC maximum":"100 ms","During Storage":"-40 ... +80 °C","Feedback Input":"Yes","Automatic Start":"No","BG BIA approval":"Yes","lifecycle_stage":"mature","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting","Shock Resistance":"8g / 10 ms, 15g / 5 ms","Valve Monitoring":"No","Delayed Switching":"0","Mounting Position":"any","at DC rated value":"24 V","Monitored Start-Up":"Yes","Product Brand Name":"SIRIUS","Product Designation":"safety relays","Design Of The Product":"spring-locked tumbler","Instantaneous Contact":"1","Standstill Monitoring":"No","1-Channel Or 2-Channel":"2","EMERGENCY OFF function":"Yes","Light Array Monitoring":"No","according to IEC 61508":"3","Design Of The Cascading":"cascading or in-service switching","Safety-Related Circuits":"Yes","EMC emitted interference":"IEC 60947-5-1, IEC 60000-4-3, IEC 60000-4-5, IEC 60000-4-6","Laser Scanner Monitoring":"No","Light Barrier Monitoring":"No","With Core End Processing":"1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.5 mm²)","Rotation Speed Monitoring":"No","Tactile Sensor Monitoring":"Yes","Position Switch Monitoring":"Yes","Protective Door Monitoring":"Yes","Of The Sensor Input Minimum":"45 ms","Operating Frequency Maximum":"2 000 1/h","Type Of Electrical Connection":"screw-type terminals","Insulation Voltage Rated Value":"300 V","Monitoring Of Floating Sensors":"Yes","Of The Cascading Input Minimum":"0.045 s","EMERGENCY-OFF circuit monitoring":"Yes","Safety-Related Delayed Switching":"1","Pressure-Sensitive Mat Monitoring":"No","DC resistance of the cable maximum":"1 000 Ω","Monitoring Of Non-Floating Sensors":"Yes","Relative Humidity During Operation":"10 ... 95 %","air pressure according to SN 31205":"90 ... 106 kPa","of the ON pushbutton input minimum":"0.2 s","Product Feature Cross-Circuit-Proof":"Yes","protection class IP of the terminal":"IP20","Cascading Input/Functional Switching":"Yes","Safety-Related Instantaneous Contact":"1","Surge Voltage Resistance Rated Value":"4 000 V","category according to EN ISO 13849-1":"4","protection class IP of the enclosure":"IP20","for enabling circuit at DC-13 at 24 V":"1 A","stop category according to EN 60204-1":"0 + 1","installation environment regarding EMC":"This product is suitable for Class A environments only. In household environments, this device can cause unwanted radio interference. The user is required to implement appropriate measures in this case.","reference code according to EN 61346-2":"F","Magnetically Operated Switch Monitoring":"Yes","for signaling function at DC-13 at 24 V":"0.5 A","Recovery Time After Power Failure Typical":"8 s","Suitability For Interaction Press Control":"No","Touch Protection Against Electrical Shock":"finger-safe","safety device type according to IEC 61508-2":"Type B","For Signaling Function Instantaneous Contact":"0","Type Of Electrical Connection Plug-In Socket":"Yes","Type Of Voltage Of The Control Supply Voltage":"DC","magnetically operated switch monitoring NC-NC":"No","magnetically operated switch monitoring NC-NO":"No","Type Of The Safety-Related Wiring Of The Inputs":"single-channel and two-channel","hardware fault tolerance according to IEC 61508":"1","vibration resistance according to IEC 60068-2-6":"5 ... 500 Hz: 0,075 mm","PFHD with high demand rate according to EN 62061":"6.9E-9 1/h","SIL Claim Limit (subsystem) according to EN 62061":"3","Mechanical Service Life (Operating Cycles) Typical":"100 000","for delayed release circuit according to IEC 61508":"SIL3","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Recovery Time After Opening Of The Safety Circuits Typical":"400 ms","design of the fuse link for short-circuit protection of the NO contacts of the relay outputs required":"gL/gG: 4 A or fast-acting: 4A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/3TK2845-1FB41/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3TK2845-1FB41","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/3TK2845-1FB41 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}}