{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1903-1BC00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1903-1BC00","canonicalUrl":"https://aoctrl.com/siemens/3RK1903-1BC00","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1903-1BC00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens Local Safety Modules PM-D F4, 3RK1903-1BC00, fail-safe extension for motor starter power module, 20.4-28.8 V DC, SIL CL 3, Cat. 4, 30 mm width, 117.5 mm depth, 196.5 mm height.","salesMarkdown":"The 3RK1903-1BC00: A hardware fault tolerance of 1 (HFT = 1) means the module can tolerate a single fault and still maintain its safety function — a key requirement for SIL 3 subsystems. The PFHd value of 9E-9 1/h (probability of dangerous failure per hour) is well below the SIL 3 threshold of 10^-7, so this module is suitable for high-demand or continuous-operation safety functions like emergency stops, light curtain monitoring, or guard door interlocking on a conveyor or packaging line. The safe state is defined as the load circuit open, which is the standard fail-safe behavior for motor starter disconnection. The control supply voltage range is 20.4 to 28.8 V DC, which matches the standard 24 V DC industrial bus voltage with margin for ripple and drop. The module is Type B per IEC 61508-2, meaning it uses complex components (microprocessors, ASICs) and requires the diagnostic coverage that the 99% DCavg figure confirms is present. ## Integration into the ET 200S system This module snaps onto the TM-PF30 busbar at 30 mm width, extending fail-safe power distribution for ET 200S motor starters. It has bus communication capability.","metaTitle":"Siemens 3RK1903-1BC00 PM-D F4 Safety Module, SIL CL 3","metaDescription":"Siemens 3RK1903-1BC00 PM-D F4 fail-safe extension for motor starter power modules. SIL CL 3, Cat. 4, 20.4-28.8 V DC, 30 mm wide. Current production. Quoted to order.","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":"3RK1903-1BC00","Height":"196.5 mm","Safe State":"Load circuit open","Rated Value":"20.4 ... 28.8 V","description":"PM-D F4 for motor starter power module, Fail-safe Extension for PM-D F 1/2 for further ET200S busbar can be plugged onto TM-PF30 S47-C0 -C1 30 mm","lifecycle_stage":"current","Bus Communication":"Yes","Product Brand Name":"Local Safety Modules","Product Designation":"PM-D F4","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=110110&mlfb=3RK1903-1BC00"},"ai":{"faq":[{"question":"What is 3RK1903-1BC00's listed depth?","answer":"The depth is 117.5 mm, which is the standard depth for ET 200S electronic modules on the TM-PF30 busbar."},{"question":"What is 3RK1903-1BC00's listed width?","answer":"The width is 30 mm, matching the single-wide ET 200S slot pitch."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1903-1BC00","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/3RK1903-1BC00 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}}