{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SK1111-1AW20","brand":"Siemens","brandSlug":"siemens","productSlug":"3SK1111-1AW20","canonicalUrl":"https://aoctrl.com/siemens/3SK1111-1AW20","factsUrl":"https://aoctrl.com/api/mcp/products/3SK1111-1AW20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3SK1111-1AW20 safety relay, 110-240 VAC/DC supply, SIL 3, 22.5 mm width, screw and snap-on mounting, 121.6 mm depth.","salesMarkdown":"It operates on a rated supply of 110 to 240 VAC/VDC, with a tolerance band of 0.85 to 1.1 times the rated value at both 50 and 60 Hz and for DC. The relay provides a start input and a feedback input, and includes a safety switch function. It switches up to 1 A at 24 V, 1.5 A at 115 V, and 1.5 A at 230 V, with a total current maximum of 12 A. The unit measures 22.5 mm wide, 100 mm high, and 121.6 mm deep, and mounts via screw or snap-on onto a DIN rail in any position. Shock resistance is 10g for 11 ms. Maximum power loss is 2.5 W. EMC emitted interference meets IEC 60947-5-1 Class A. Wire connection: solid 1x (20-14 AWG) or 2x (18-16 AWG); stranded 1x (20-16 AWG) or 2x (20-16 AWG); with ferrule 1x (0.5-2.5 mm²) or 2x (0.5-1.0 mm²). Typical response time is 200 ms; maximum 300 ms for AC or DC. The SIL 3 rating means this relay is certified for use in safety circuits up to Performance Level e (EN ISO 13849-1) where a single fault cannot cause loss of the safety function — it's the level most machine-guarding and emergency-stop circuits demand. The screw and snap-on mounting means you can clip it onto the rail or bolt it down in high-vibration spots. The start input and feedback input let you wire a monitored start button and an external contactor feedback loop, which is the typical arrangement for a reset circuit that won't restart the machine automatically after a fault clears.","metaTitle":"Siemens 3SK1111-1AW20 Safety Relay, 110-240 VAC/DC, SIL 3, 2","metaDescription":"Siemens SIRIUS 3SK1111-1AW20 safety relay, 110-240 VAC/DC, SIL 3 per IEC 61508, 22.5 mm wide, screw and snap-on mounting. Sourced to order — request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Safety Relays"],"specifications":{"Depth":"121.6 mm","Solid":"1x (20 ... 14), 2x (18 ... 16)","Width":"22.5 mm","at DC":"0.85 ... 1.1","Height":"100 mm","Maximum":"300 ms","Typical":"200 ms","at 24 V":"1 A","Stranded":"1x (20 ... 16), 2x (20 ... 16)","at 115 V":"1.5 A","at 230 V":"1.5 A","at 50 Hz":"0.85 ... 1.1","at 60 Hz":"0.85 ... 1.1","Rated Value":"110 ... 240 V","Start Input":"Yes","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","Safety Switch":"Yes","at AC maximum":"130 ms","at DC maximum":"130 ms","During Storage":"-40 ... +80 °C","Feedback Input":"Yes","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting","Product Category":"Safety relays","Shock Resistance":"10g / 11 ms","Mounting Position":"any","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"safety relays","Overvoltage Category":"3","Design Of The Product":"Relay enabling circuits","Total Current Maximum":"12 A","according to IEC 61508":"3","according to IEC 62061":"3","power loss [W] maximum":"2.5 W","Safety-Related Circuits":"Yes","EMC emitted interference":"IEC 60947-5-1, Class A","With Core End Processing":"1x (0.5 ... 2.5 mm²), 2x (0.5 ... 1.0 mm²)","according to ISO 13849-1":"e","Of The Sensor Input Minimum":"150 ms","Operating Frequency Maximum":"360 1/h","Safe failure fraction (SFF)":"99 %","Type Of Electrical Connection":"screw-type terminals","Insulation Voltage Rated Value":"300 V","Monitoring Of Floating Sensors":"Yes","Product Function Parameterizable":"Sensor floating / monitored start / automatic start","Safety-Related Delayed Switching":"0","Monitoring Of Non-Floating Sensors":"No","Relative Humidity During Operation":"10 ... 95 %","air pressure according to SN 31205":"90 ... 106 kPa","of the ON pushbutton input minimum":"0.015 s","Product Feature Cross-Circuit-Proof":"Yes","operational current at 17 V minimum":"5 mA","Cascading Input/Functional Switching":"No","Safety-Related Instantaneous Contact":"3","Surge Voltage Resistance Rated Value":"4 000 V","category according to EN ISO 13849-1":"4","protection class IP of the enclosure":"IP20","stop category according to EN 60204-1":"0","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.","Magnetically Operated Switch Monitoring":"No","reference code according to IEC 81346-2":"F","Recovery Time After Power Failure Typical":"0.32 s","Suitability For Interaction Press Control":"No","Touch Protection Against Electrical Shock":"finger-safe","safety device type according to IEC 61508-2":"Type A","For Signaling Function Instantaneous Contact":"1","Type Of Electrical Connection Plug-In Socket":"No","Type Of Voltage Of The Control Supply Voltage":"AC/DC","Number Of Sensor Inputs 1-Channel Or 2-Channel":"1","Required Spacing For Grounded Parts At The Side":"5 mm","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: 0.75 mm","PFHD with high demand rate according to EN 62061":"1.5E-9 1/h","suitability for operation device connector 3ZY12":"No","Mechanical Service Life (Operating Cycles) Typical":"10 000 000","PFDavg with low demand rate according to IEC 61508":"1E-6","Installation Altitude At Height Above Sea Level Maximum":"4 000 m; Derating, see Product Notification 109792701","Recovery Time After Opening Of The Safety Circuits Typical":"10 ms","Thermal Current Of The Switching Element With Contacts Maximum":"5 A","Backslide Delay Time After Opening Of The Safety Circuits Typical":"10 ms","design of the fuse link for short circuit protection of the NC contacts of the relay outputs required":"Diazed or Neozed fuses, operating class gL/gG: 6 A or MCB type A: 2 A or MCB type B: 2 A or MCB type C: 1 A","design of the fuse link for short-circuit protection of the NO contacts of the relay outputs required":"gL/gG: 6A or circuit breaker type A: 3A or circuit breaker type B: 2A or circuit breaker type C: 1A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/3SK1111-1AW20/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3SK1111-1AW20?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the 3SK1111-1AW20 rated voltage and current?","answer":"Rated supply is 110 to 240 VAC/VDC. Switching current is 1 A at 24 V, 1.5 A at 115 V, and 1.5 A at 230 V. Total current maximum is 12 A."},{"question":"What compliance documentation is available for 3SK1111-1AW20?","answer":"The relay is designed to IEC 60947-5-1 for EMC (Class A) and carries SIL 3 certification per IEC 61508 and IEC 62061. Standard Siemens documentation includes the declaration of conformity, CE marking, and RoHS/REACH compliance data available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3SK1111-1AW20","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/3SK1111-1AW20 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}}