{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1903-1CA01","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1903-1CA01","canonicalUrl":"https://aoctrl.com/siemens/3RK1903-1CA01","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1903-1CA01","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RK1903-1CA01 F-kit RS1-X for ET200S solution local, Category 4/PL e / SIL 3, for reversing starter.","salesMarkdown":"The Siemens 3RK1903-1CA01 is an F-kit RS1-X for the ET200S distributed I/O system, designed to build a local safety reversing starter. It contains two auxiliary switch blocks, one contact holder with connecting cable, one jumper cable, and four contact carriers for the terminal module (TM). This kit supports safety applications up to Category 4 / Performance Level e per ISO 13849-1 and up to SIL 3 per IEC 62061, making it suitable for guarding hazardous motion on reversing drives — conveyors, transfer lines, or any load that needs controlled reversal in a safety circuit. The substance prohibitance date of 05/01/2012 indicates compliance with RoHS and REACH substance restrictions as of that date — relevant for EU regulatory acceptance and for buyers who need to document material declarations on a BOM. ## Integration context This F-kit mounts onto the ET200S terminal module (TM) and connects to the safety-related backplane bus. It is not a standalone contactor — it is the accessory bundle that turns a standard ET200S output module into a safety-rated reversing starter with local control. The two auxiliary switch blocks provide feedback for the safety logic.","metaTitle":"Siemens 3RK1903-1CA01 F-kit RS1-X for ET200S safety reversin","metaDescription":"Siemens 3RK1903-1CA01 F-kit RS1-X for ET200S solution local up to Category 4/PL e / SIL 3 for reversing starter. Lifecycle stage: current. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"title":"3RK1903-1CA01","description":"F-kit RS1-X for ET200S solution local up to Category 4/ PL E according to ISO13849-1 up to SIL 3 IEC 62061 for reversing starter consists of: 2 auxiliary switch blocks 1 contact holder with Connecting cable 1 connecting cable (jumper) 4 contact carriers for TM","lifecycle_stage":"current","Substance Prohibitance (Date)":"05/01/2012"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2506c84bc50fd54eb200b0e325c9c833.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=42404&mlfb=3RK1903-1CA01"},"ai":{"faq":[{"question":"What compliance documentation does this part carry?","answer":"The substance prohibitance date of 05/01/2012 confirms compliance with RoHS and REACH substance restrictions as of that date. The safety ratings (Category 4/PL e, SIL 3) are per ISO 13849-1 and IEC 62061 respectively."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1903-1CA01","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/3RK1903-1CA01 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}}