{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1903-0CF00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1903-0CF00","canonicalUrl":"https://aoctrl.com/siemens/3RK1903-0CF00","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1903-0CF00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC 3RK1903-0CF00 Remote I/O & Fieldbus Module, 15 mm width, 24 V DC supply, 2 digital inputs, brake control 180–500 V DC, pluggable on terminal module.","salesMarkdown":"## 15 mm slice for brake control The 3RK1903-0CF00: At 15 mm wide, this SIMATIC module fits into a crowded DIN-rail cabinet where every millimeter of panel space is allocated — it occupies less than a typical miniature circuit breaker slot. It handles brake control across three common industrial voltages: 180 V DC, 230 V AC, and 500 V DC, so a single module type can cover different brake coil specs on the same line without adding interposing relays. The two digital inputs are parameterizable, meaning you can configure them for limit-switch feedback, brake wear monitoring, or emergency-stop status without hardware changes. ## Mounting and power routing Mounting position is vertical or horizontal, which gives flexibility in tight enclosures where rail orientation is constrained. ## Industrial environment tolerance Surge voltage resistance is 8 kV, and EMC immunity meets severity 3 per IEC 60947-1 for industrial sector ambience A — this module is designed to keep communicating through the electrical noise of motor starters and drives on the same panel. Operating temperature range is 0…60 °C with 5…95 % relative humidity, and vibration resistance is 2g with shock resistance at 5g / 11 ms — it survives the mechanical stress of a machine-mounted enclosure.","metaTitle":"Siemens 3RK1903-0CF00 SIMATIC Remote I/O, 15 mm, 24 V DC","metaDescription":"Siemens 3RK1903-0CF00 SIMATIC Remote I/O module, 15 mm wide, 24 V DC, 2 digital inputs, brake control up to 500 V DC. Active production, sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Depth":"95 mm","Width":"15 mm","at DC":"24 ... 24 V","title":"3RK1903-0CF00","Height":"196.5 mm","description":"XB4 for ET 200S for DS1-X / RS1-X brake control module 500 V AC 0.7 A for motors with mechanical brakes DI 2 x 24 V DC local control","Of The Inputs":"1 byte","During Storage":"-40 ... +70 °C","lifecycle_stage":"current","During Operation":"0 ... 60 °C","During Transport":"-40 ... +70 °C","Fastening Method":"pluggable on terminal module","Shock Resistance":"5g / 11 ms","Mounting Position":"vertical, horizontal","Product Brand Name":"SIMATIC","Maximum Permissible":"28.8 V","Minimum Permissible":"20.4 V","Vibration Resistance":"2g","For Main Energy Infeed":"screw-type terminals","supply voltage 1 at DC":"24 ... 24 V","Number Of Digital Inputs":"2","brake control with 24 V DC":"No","brake control with 180 V DC":"Yes","brake control with 230 V AC":"Yes","brake control with 500 V DC":"Yes","For Main Energy Transmission":"via energy bus","For Supply Voltage Line-Side":"via backplane bus","For Load-Side Outgoing Feeder":"Screw-type terminals","Operating Voltage Rated Value":"180 ... 500 V","Substance Prohibitance (Date)":"05/01/2012","supports PROFIenergy shutdown":"No","Digital Inputs Parameterizable":"Yes","For Communication Transmission":"via backplane bus","Of The Communication Interface":"via backplane bus","Digital Outputs Parameterizable":"No","For Supply Voltage Transmission":"via backplane bus","Relative Humidity During Operation":"5 ... 95 %","Surge Voltage Resistance Rated Value":"8 kV","supports PROFIenergy measured values":"No","EMC immunity according to IEC 60947-1":"corresponds to degree of severity 3, ambience A (industrial sector)","Type Of Voltage Of The Supply Voltage":"DC","Number Of Poles For Main Current Circuit":"2","Type Of Voltage Of The Control Supply Voltage":"DC","EMC emitted interference according to IEC 60947-1":"CISPR11, ambience A (industrial sector)","Installation Altitude At Height Above Sea Level Maximum":"2 000 m"}},"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=253259&mlfb=3RK1903-0CF00"},"ai":{"faq":[{"question":"What is the width and depth of 3RK1903-0CF00?","answer":"Width is 15 mm, depth is 95 mm, height is 196.5 mm — a narrow profile that fits standard DIN-rail enclosures without crowding adjacent devices."},{"question":"Can 3RK1903-0CF00 control a 500 V DC brake?","answer":"Yes, the module supports brake control with 500 V DC, as well as 180 V DC and 230 V AC, covering most industrial brake coil voltages directly."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1903-0CF00","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/3RK1903-0CF00 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}}