{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1903-1BA00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1903-1BA00","canonicalUrl":"https://aoctrl.com/siemens/3RK1903-1BA00","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1903-1BA00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens Local Safety Modules PM-D F1, 3RK1903-1BA00, fail-safe power module for motor starters, SIL CL 3, Category 4, 20.4-28.8 V DC, 30 x 196.5 x 117.5 mm.","salesMarkdown":"The Siemens 3RK1903-1BA00 is a PM-D F1 fail-safe power module from the Local Safety Modules series, designed for monitored start and emergency-stop safety circuits. Rated SIL CL 3 per IEC 61508 and Category 4 per EN ISO 13849-1, with a safe failure fraction of 99 % and average diagnostic coverage of 99 %, this module achieves a PFHD of 8.7E-9 1/h — well within the high-demand SIL 3 range, meaning it can be used in safety functions where the probability of dangerous failure per hour must be below 1E-8. The safe state is load circuit open, and the hardware fault tolerance is 1 (Type B device per IEC 61508-2), so a single fault in the module does not lead to loss of the safety function. ## Supply and integration Operates on a 20.4... 28.8 V DC control supply. The 30 mm width matches the TM-PF30 footprint. Bus communication is supported, allowing the safety module to exchange status with the higher-level controller over the local bus backbone. Mechanical service life is rated at 10,000,000 operating cycles typical, with electrical endurance at 200,000 cycles typical. The module carries a substance prohibitance date of 05/01/2012, indicating RoHS compliance from that date onward. No short-circuit protection is integrated — the upstream supply or motor starter must provide that. Approvals include IEC 61508 (SIL CL 3), EN ISO 13849-1 (Category 4), and EN 62061 (SIL Claim Limit 3). The design is for safety circuits per the product designation.","metaTitle":"Siemens 3RK1903-1BA00 PM-D F1 Safety Module, SIL CL 3, Cat 4","metaDescription":"Siemens 3RK1903-1BA00 PM-D F1 fail-safe power module for motor starters. SIL CL 3, Cat 4, PFHD 8.7E-9 1/h. 20.4-28.8 V DC. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Depth":"117.5 mm","Width":"30 mm","Height":"196.5 mm","Safe State":"Load circuit open","Rated Value":"20.4 ... 28.8 V","lifecycle_stage":"current","Bus Communication":"Yes","Product Brand Name":"Local Safety Modules","Product Designation":"PM-D F1","Design Of The Product":"for safety circuits","according to IEC 61508":"SIL CL 3","Short Circuit Protection":"No","Safe failure fraction (SFF)":"99 %","Substance Prohibitance (Date)":"05/01/2012","category according to EN ISO 13849-1":"4","average diagnostic coverage level (DCavg)":"99 %","safety device type according to IEC 61508-2":"Type B","Type Of Voltage Of The Control Supply Voltage":"DC","Electrical Endurance (Operating Cycles) Typical":"200 000","hardware fault tolerance according to IEC 61508":"1","PFHD with high demand rate according to EN 62061":"8.7E-9 1/h","SIL Claim Limit (subsystem) according to EN 62061":"3","Mechanical Service Life (Operating Cycles) Typical":"10 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"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=112442&mlfb=3RK1903-1BA00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1903-1BA00/alternatives.json"},"ai":{"faq":[{"question":"What is the supply voltage range for 3RK1903-1BA00?","answer":"20.4... 28.8 V DC."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1903-1BA00","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/3RK1903-1BA00 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}}