{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3SK1912-3SB40","brand":"Siemens","brandSlug":"siemens","productSlug":"3SK1912-3SB40","canonicalUrl":"https://aoctrl.com/siemens/3SK1912-3SB40","factsUrl":"https://aoctrl.com/api/mcp/products/3SK1912-3SB40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS Advanced Bundle, safety engineering package, 3SK1912-3SB40, SIL 3 / PL e / Cat 4, IP20, 320×160×240 mm.","salesMarkdown":"## Safety-rated bundle for SIL 3 / PL e applications The Siemens 3SK1912-3SB40 is a SIRIUS Advanced Bundle — a pre-assembled safety engineering package rated to SIL 3 (IEC 61508), SIL CL 3 (IEC 62061), and PL e (ISO 13849-1) with Category 4 structure (EN ISO 13849-1). That means it meets the highest standard for guarding hazardous machinery: a single fault in any component cannot cause loss of the safety function, and the system detects the fault at the next demand or automatically. The hardware fault tolerance is HFT = 1 (IEC 61508-2), and the device type is Type A, so its failure modes are well-defined and predictable. ## What's in the box — BOM verification This bundle ships as a complete safety sub-system. The package includes a safety relay, expansion module, motor starter, pushbutton, enclosure parts, holders, base connectors, safety switches, and a connecting cable. ## IP20 finger-safe enclosure The enclosure carries IP20 protection, which means it is finger-safe against accidental contact with live parts but not sealed against moisture or dust ingress. Mount inside a cabinet or panel with a minimum IP54 rating if the environment has washdown or airborne particulates. The screw-type and spring-loaded terminal options (both listed) let you choose between traditional ring-lug wiring and tool-less spring-cage termination — useful when panel builders prefer one method over the other. ## Active lifecycle — no end-of-life concern The 3SK1912-3SB40 carries an Active lifecycle status from Siemens. No phase-out or last-time-buy notice is on record. ## Altitude derating and installation limits Maximum installation altitude is 4 000 m above sea level, with derating required above that per Siemens Product Notification 109792701. The bundle includes both start input and feedback input terminals.","metaTitle":"Siemens 3SK1912-3SB40 SIRIUS Safety Bundle, SIL 3 / PL e","metaDescription":"Siemens SIRIUS 3SK1912-3SB40 Advanced safety bundle: SIL 3 (IEC 61508), PL e (ISO 13849-1), Cat 4. Active production. 320×160×240 mm. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Safety Relays"],"specifications":{"Depth":"320 mm","Width":"160 mm","Height":"240 mm","Start Input":"Yes","Feedback Input":"Yes","lifecycle_stage":"current","Product Category":"Safety engineering","Product Brand Name":"SIRIUS","Product Designation":"Advanced Bundle","according to IEC 61508":"3","according to IEC 62061":"3","according to ISO 13849-1":"e","Type Of Electrical Connection":"screw-type terminals, spring-loaded terminals","category according to EN ISO 13849-1":"4","protection class IP of the enclosure":"IP20","Magnetically Operated Switch Monitoring":"No","Touch Protection Against Electrical Shock":"finger-safe","safety device type according to IEC 61508-2":"Type A","Type Of Electrical Connection Plug-In Socket":"No","hardware fault tolerance according to IEC 61508":"1","suitability for operation device connector 3ZY12":"Yes","Installation Altitude At Height Above Sea Level Maximum":"4 000 m; Derating, see Product Notification 109792701"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://aoctrl.com/api/mcp/products/3SK1912-3SB40/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3SK1912-3SB40?","answer":"The 3SK1912-3SB40 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/3SK1912-3SB40","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/3SK1912-3SB40 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}}