{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1903-0CJ00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1903-0CJ00","canonicalUrl":"https://aoctrl.com/siemens/3RK1903-0CJ00","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1903-0CJ00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC interface module, 3RK1903-0CJ00, 24 V DC supply, 400 V rated operating voltage, 50/60 Hz, depth 95 mm, width 15 mm.","salesMarkdown":"## What this module does in the panel The Siemens 3RK1903-0CJ00 is a SIMATIC interface module that plugs onto a terminal module — no DIN-rail screwdriver work for the base connection. It draws 24 V DC from the backplane bus (minimum 20.4 V, maximum 28.8 V) and handles a rated operating voltage of 400 V at 50 or 60 Hz. The 95 mm depth and 15 mm width keep it tight on the rail; the 196.5 mm height is the dimension that decides how much enclosure clearance you need above the DIN channel. Brake control is handled for 230 V AC loads — the module does not support 24 V DC, 180 V DC, or 500 V DC brake outputs, so if your motor brake coil runs on one of those voltages, this is not the interface you want. The main energy infeed uses screw-type terminals; load-side outgoing feeders also land on screw terminals, while communication and supply voltage transmission ride the backplane bus. ## Environmental and EMC profile Relative humidity tolerance is 5 to 95 % during operation — no condensation issues in typical panel environments. Shock resistance is 5 g / 11 ms; vibration resistance is 2 g. Mounting position can be vertical or horizontal, which gives flexibility in crowded enclosures. EMC immunity meets IEC 60947-1 severity 3, ambience A (industrial sector). That means it holds up in the same panel as contactors and drives without needing an external filter for conducted immunity — the module itself is hardened for industrial electrical noise.","metaTitle":"Siemens 3RK1903-0CJ00 SIMATIC Interface Module, 24 V DC, 400","metaDescription":"Siemens 3RK1903-0CJ00 SIMATIC interface module, 24 V DC supply, 400 V rated, 50/60 Hz. Depth 95 mm, width 15 mm. Current lifecycle. 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","Height":"196.5 mm","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":"0","brake control with 24 V DC":"No","brake control with 180 V DC":"No","brake control with 230 V AC":"Yes","brake control with 500 V DC":"No","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":"400 ... 400 V","Substance Prohibitance (Date)":"05/01/2012","supports PROFIenergy shutdown":"No","Digital Inputs Parameterizable":"No","For Communication Transmission":"via backplane bus","Of The Communication Interface":"via backplane bus","Digital Outputs Parameterizable":"No","For Supply Voltage Transmission":"via backplane bus","Operating Frequency 1 Rated Value":"50 Hz","Operating Frequency 2 Rated Value":"60 Hz","Relative Humidity During Operation":"5 ... 95 %","Surge Voltage Resistance Rated Value":"4 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)","Relative Negative Tolerance Of The Operating Frequency":"10 %","Relative Positive Tolerance Of The Operating Frequency":"10 %","Installation Altitude At Height Above Sea Level Maximum":"2 000 m"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$96.52","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=228369&mlfb=3RK1903-0CJ00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1903-0CJ00/alternatives.json"},"ai":{"faq":[{"question":"What is the supply voltage range for 3RK1903-0CJ00?","answer":"The module operates on 24 V DC, with a permissible range of 20.4 V to 28.8 V. Supply voltage is drawn from the backplane bus."},{"question":"What brake control voltages does 3RK1903-0CJ00 support?","answer":"It supports brake control with 230 V AC. It does not support 24 V DC, 180 V DC, or 500 V DC brake outputs."},{"question":"What are the mounting dimensions of 3RK1903-0CJ00?","answer":"Depth is 95 mm, width is 15 mm, height is 196.5 mm. It mounts vertically or horizontally and plugs onto a terminal module."},{"question":"How do I get current pricing and availability for 3RK1903-0CJ00?","answer":"Submit an RFQ through the storefront. Availability and current pricing are confirmed at quote time through independent distribution channels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1903-0CJ00","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/3RK1903-0CJ00 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}}