{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1903-1BE00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1903-1BE00","canonicalUrl":"https://aoctrl.com/siemens/3RK1903-1BE00","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1903-1BE00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens Local Safety Modules PM-D F5, 3RK1903-1BE00, fail-safe extension for motor starters, 4 floating relay contacts, 24 V DC, SIL CL 3, Category 4.","salesMarkdown":"The Siemens 3RK1903-1BE00 is a PM-D F5 fail-safe extension module that plugs onto a TM-PF30 S47-D0 base unit to add four floating relay contacts to a motor-starter safety circuit. It's designed for safety applications that demand SIL CL 3 (per IEC 61508) and Category 4 (per EN ISO 13849-1) performance — the highest standard for guarding against hazardous motion. The module sits on a 30 mm-wide DIN-rail footprint, so it tucks into the same panel as the motor starter it's protecting. ## What the safety ratings mean for the buyer The SIL CL 3 and Category 4 ratings mean this module is built for redundant, fault-tolerant safety circuits where a single failure won't lose the safety function. The safe failure fraction (SFF) of 99 % and average diagnostic coverage (DCavg) of 99 % tell you the module detects nearly all dangerous faults and either holds the safe state (load circuit open) or signals a fault. The PFHD of 9E-9 1/h (probability of dangerous failure per hour) is well below the 1E-8 threshold for SIL 3 — so in a high-demand application like a press or robot cell, the module meets the strictest international standards for risk reduction.","metaTitle":"Siemens 3RK1903-1BE00 PM-D F5 Safety Module, SIL CL 3, 4 rel","metaDescription":"Siemens 3RK1903-1BE00 PM-D F5 fail-safe extension module for motor starters. SIL CL 3, Category 4, PFHD 9E-9 1/h. 4 floating relay contacts, 24 V DC. Current production. Sourced to","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","title":"3RK1903-1BE00","Height":"196.5 mm","Safe State":"Load circuit open","Rated Value":"20.4 ... 28.8 V","description":"PM-D F5 for motor starter Power module, Fail-safe Extension to PM-D F1 up to F4 Contact multiplier with 4 floating relay contacts 24 V DC max. 3 A per contact can be plugged onto TM-PF30 S47-D0 30 mm","lifecycle_stage":"current","Bus Communication":"Yes","Product Brand Name":"Local Safety Modules","Product Designation":"PM-D F5","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":"9E-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,"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=320679&mlfb=3RK1903-1BE00"},"ai":{"faq":[{"question":"What safety standards does the 3RK1903-1BE00 meet?","answer":"It meets SIL CL 3 per IEC 61508, Category 4 per EN ISO 13849-1, and SIL Claim Limit 3 per EN 62061. It is also classified as a Type B safety device under IEC 61508-2."},{"question":"What are the key dimensions of the 3RK1903-1BE00?","answer":"Width is 30 mm, height is 196.5 mm, and depth is 117.5 mm. It snaps onto a standard 35 mm DIN rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1903-1BE00","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/3RK1903-1BE00 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}}