{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SK1111-1AB30","brand":"Siemens","brandSlug":"siemens","productSlug":"3SK1111-1AB30","canonicalUrl":"https://aoctrl.com/siemens/3SK1111-1AB30","factsUrl":"https://aoctrl.com/api/mcp/products/3SK1111-1AB30","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3SK1111-1AB30 safety relay, 24 VDC, 3 enabling circuits, SIL 3, 22.5 mm, screw and snap-on mounting.","salesMarkdown":"The Siemens 3SK1111-1AB30 is a SIRIUS safety relay with three enabling circuits, designed for safety-related shutdown of machinery per IEC 61508 and IEC 62061, both rated SIL 3. It operates on a 24 VDC supply (rated value, with an operating range of 0.85 to 1.2 times nominal at DC). The relay contacts are rated 1 A at 24 V, 1.5 A at 115 V, and 1.5 A at 230 V — these are the switching currents per enabling path, not the total through-contact rating. ## Safety architecture and SIL 3 The 3SK1111-1AB30 is a relay-based safety module, not a configurable controller. It provides three enabling paths (relay enabling circuits) that drop out on a safety demand. The SIL 3 rating per IEC 61508 and IEC 62061 means it meets the highest single-device integrity level for machinery safety — suitable for guarding applications where a single fault cannot lead to loss of the safety function. It also carries a start input and a feedback input, allowing monitored start and external contactor feedback for cross-monitoring. The housing is 22.5 mm wide, 100 mm high, and 121.6 mm deep — a standard single-module footprint for DIN-rail safety relays. The terminal wiring accepts solid conductors 1x (20…14 AWG) and 2x (18…16 AWG), or stranded 1x (20…16 AWG) and 2x (20…16 AWG), with core-end processing for 1x (0.5…2.5 mm²) and 2x (0.5…1.0 mm²). Shock resistance is 10 g for 11 ms. Total current through the device is limited to 12 A maximum, with a maximum power loss of 2 W. Response times: typical 65 ms, maximum 75 ms at DC; at AC maximum 320 ms. EMC compliance is to IEC 60947-5-1 and IEC 61000.","metaTitle":"Siemens 3SK1111-1AB30 SIRIUS Safety Relay, 24 VDC, 3 SIL 3","metaDescription":"Siemens 3SK1111-1AB30 SIRIUS safety relay, 24 VDC coil, 3 enabling paths, SIL 3 per IEC 61508. Screw/snap-on 22.5 mm. 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 ... 1.2","Height":"100 mm","Maximum":"75 ms","Typical":"65 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":"24 V","Start Input":"Yes","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","Safety Switch":"Yes","at AC maximum":"320 ms","at DC maximum":"320 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 W","Safety-Related Circuits":"Yes","EMC emitted interference":"IEC 60947-5-1, IEC 61000","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 / sensor non-floating, monitored start-up / automatic start","Safety-Related Delayed Switching":"0","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":"0.015 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 B environments and can also be used in domestic environments.","Magnetically Operated Switch Monitoring":"Yes","reference code according to IEC 81346-2":"F","Recovery Time After Power Failure Typical":"0.09 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":"1.7E-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/3SK1111-1AB30/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for 3SK1111-1AB30?","answer":"It is a 24 VDC safety relay with three enabling circuits rated SIL 3 per IEC 61508. Contact ratings are 1 A at 24 V, 1.5 A at 115 V, and 1.5 A at 230 V. The housing is 22.5 mm wide for DIN-rail mounting."},{"question":"Where can I buy the 3SK1111-1AB30?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at the time of quote — submit an RFQ for a firm response."},{"question":"What compliance documentation is available for 3SK1111-1AB30?","answer":"The relay carries EMC compliance to IEC 60947-5-1 and IEC 61000. It is rated for pollution degree 3 and overvoltage category III per IEC standards. Specific RoHS, REACH, and UL documentation should be confirmed at order time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3SK1111-1AB30","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/3SK1111-1AB30 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}}