{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK3923-2AC00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK3923-2AC00","canonicalUrl":"https://aoctrl.com/siemens/3RK3923-2AC00","factsUrl":"https://aoctrl.com/api/mcp/products/3RK3923-2AC00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS Modular Safety System starter kit, 3RK3923-2AC00, SIL CL 3 / PL e, spring-loaded terminals, 4.5 W, 1 ms dark period.","salesMarkdown":"## What this starter kit delivers The Siemens 3RK3923-2AC00 is a SIRIUS Modular Safety System starter kit — the bundle that gets you a central unit MSS ASIsafe Basic, spring-loaded terminals, a license for Safety ES V1.0 Premium software, and a USB PC cable. It is rated SIL CL 3 per IEC 61508 and PL e per ISO 13849-1, which means it meets the highest standard safety-integrity level for guarding hazardous motion on a production line. The PFHD sits at 7e-9 1/h (high demand rate per EN 62061), so the probability of dangerous failure per hour is negligible — this is the kind of spec a Tier-1 automotive line or a packaging cell demands for its safety circuit. Power draw is 4.5 W, and the dark period of the common drivers is 1 ms at 24 V — that 1 ms is the time the safety outputs stay off after a fault clears, preventing a fast re-start that could trap a technician. The input delay at the digital inputs maxes at 150 ms; the ingress acquisition time (the time it takes to register a sensor signal change) is 60 ms. Both are typical for a configurable safety controller and give the integrator enough window to debounce mechanical safety switches without false trips. Connection is via spring-loaded terminals — no screwdriver needed for the power and I/O wiring, which speeds up panel assembly and reduces torque-verification steps.","metaTitle":"Siemens 3RK3923-2AC00 SIRIUS Starter Kit, SIL CL 3, PL e","metaDescription":"Siemens 3RK3923-2AC00 SIRIUS Modular Safety System starter kit. SIL CL 3 / PL e, spring terminals, 4.5 W. Current lifecycle stage: active. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Safety Relays"],"specifications":{"title":"3RK3923-2AC00","at 24 V":"1 ms","description":"Starter package for modular Safety system 3RK3 Content: Central unit MSS ASIsafe Basic connection: Spring-type terminal Software Safety ES V1.0 Premium, USB PC cable","lifecycle_stage":"current","Product Category":"Modular Safety System","Product Brand Name":"SIRIUS","Product Designation":"Starter kit","according to IEC 61508":"SIL CL 3","according to IEC 62061":"3","Operating Frequency Maximum":"1 000 1/h","Operating Power Rated Value":"4.5 W","Substance Prohibitance (Date)":"07/01/2006","Type Of Electrical Connection":"spring-loaded terminals","Dark Period Of The Common Drivers":"1 ms","reference code according to IEC 81346-2":"K","Input Delay Time At Digital Input Maximum":"150 ms","performance level (PL) according to ISO 13849-1":"e","Ingress Aquisition Time At Digital Input Maximum":"60 ms","PFHD with high demand rate according to EN 62061":"0.000000007 1/h","Mechanical Service Life (Switching Cycles) Typical":"10 000 000","Design Of The Contactless Switching Element Safety-Related":"P potential","Diagnostics Test Interval By Internal Test Function Maximum":"1 000 s"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0bb51c45332ac10ad11cf2b3b32923af.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=357565&mlfb=3RK3923-2AC00"},"ai":{"faq":[{"question":"Where can I buy 3RK3923-2AC00 and get a price?","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 1 ms at 24 V rating on 3RK3923-2AC00?","answer":"That 1 ms is the dark period of the common drivers — the minimum off-time the safety outputs enforce after a fault clears, preventing a rapid re-start."},{"question":"Will 3RK3923-2AC00 drop into a panel built for 3RH2122-1WB40?","answer":"No — 3RK3923-2AC00 is a modular safety system starter kit (central unit + software), not a contactor or coupling relay. The 3RH2122-1WB40 is a SIRIUS coupling relay with screw terminals and a different form factor. They serve different functions and are not drop-in interchangeable."},{"question":"What compliance documentation does Siemens provide for 3RK3923-2AC00?","answer":"The part is RoHS-compliant per the substance prohibitance date of 07/01/2006, and carries IEC 61508 SIL CL 3 and ISO 13849-1 PL e certifications for functional safety."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK3923-2AC00","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/3RK3923-2AC00 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}