{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1903-0CB00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1903-0CB00","canonicalUrl":"https://aoctrl.com/siemens/3RK1903-0CB00","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1903-0CB00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC brake control module, 3RK1903-0CB00, 24 V DC, 15 mm wide, 95 mm deep, pluggable on terminal module, current lifecycle stage.","salesMarkdown":"The Siemens SIMATIC 3RK1903-0CB00 is a brake control module, 24 V DC nominal, supplying a 24 V DC brake. It is pluggable on a terminal module, meaning it snaps onto a prewired base without disturbing the existing wiring — a clean swap for a line-down situation. The 15 mm width and 95 mm depth keep it slim on the DIN rail; height is 196.5 mm. Mount vertically or horizontally. Supply voltage is 24 V DC, permissible range 20.4 V to 28.8 V — so it holds on a nominal 24 V bus even with a moderate drop. Surge voltage resistance is 8 kV, which places it in severity 3 / industrial ambient A per IEC 60947-1. That means it can ride out the transients common on a motor-heavy line without nuisance failure. Shock resistance is 5g / 11 ms; vibration resistance is 2g — robust enough for most panel-mounted environments but not for direct machine-mount without isolation. ## Integration notes Main energy infeed uses screw-type terminals; load-side outgoing feeder also screw-type. Energy bus transmission is via the backplane bus — no separate power wiring needed for the bus. Two poles for the main current circuit. Brake control is 24 V DC only; no 180 V DC, 230 V AC, or 500 V DC brake control. Operating frequency up to 750 1/h. Relative humidity 5 to 95 % during operation. No PROFIenergy shutdown or measured values.","metaTitle":"Siemens SIMATIC 3RK1903-0CB00 Brake Control Module, 24 V DC,","metaDescription":"Siemens SIMATIC 3RK1903-0CB00 brake control module, 24 V DC, 15 mm wide, current lifecycle stage. Sourced to order against RFQ. Depth 95 mm, height 196.5 mm, pluggable on terminal","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":"Yes","Operating Frequency Maximum":"750 1/h","brake control with 180 V DC":"No","brake control with 230 V AC":"No","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":"24 ... 24 V","Substance Prohibitance (Date)":"03/01/2017","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","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","Type Of Voltage Of The Supply Voltage For Brake Control Required":"DC","operating range relative to the operating voltage at AC at 50 Hz":"200 ... 440 V","operating voltage at AC at 60 Hz according to CSA and UL rated value":"600 V"}},"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=106429&mlfb=3RK1903-0CB00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1903-0CB00/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RK1903-0CB00?","answer":"The module is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the depth and width of 3RK1903-0CB00?","answer":"Depth is 95 mm, width is 15 mm, height is 196.5 mm."},{"question":"Will 3RK1903-0CB00 drop into a panel specified around 3RT5045-1AP20 without rewiring?","answer":"No. 3RT5045-1AP20 is a contactor, not a brake control module — different function, different wiring, different footprint. The 3RK1903-0CB00 plugs onto a terminal module and uses screw-type terminals for main infeed and load-side outgoing feeder; it is not a direct mechanical or electrical replacement for a contactor."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1903-0CB00","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/3RK1903-0CB00 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}}