{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1908-0AP00-0KP0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1908-0AP00-0KP0","canonicalUrl":"https://aoctrl.com/siemens/3RK1908-0AP00-0KP0","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1908-0AP00-0KP0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC BaseUnit 3RK1908-0AP00-0KP0, 1 digital input, push-in terminals, 24 V DC supply, 7 A ampacity, DIN rail mount, Type 1 per EN 61131-2.","salesMarkdown":"The Siemens SIMATIC 3RK1908-0AP00-0KP0 is a BaseUnit — the DIN-rail-mounted backplane that carries one fail-safe digital input (F-DI), with no AC/DC infeed onboard. It feeds the input from a 24 V DC supply rail (20.4 to 28.8 V permissible) and handles up to 7 A total ampacity. The single input is Type 1 per EN 61131-2, meaning it's designed for standard industrial proximity switches and pushbuttons, not the higher-threshold Type 2/3 variants used on some 2-wire sensors. 75 mm deep, 30 mm wide, 215 mm tall — it slots into a standard DIN-rail panel alongside other SIMATIC safety modules. Push-in spring terminals on both the main current circuit and the auxiliary/control circuit. Standard slot screwdriver, 0.6 mm x 3.5 mm tip, for release. Strip length is not given here, but 8 mm is typical for this terminal family — verify against the terminal marking on the unit. Spring-cage holds firm under vibration; the unit is rated for 6g shock at 11 ms and 2g vibration up to 500 Hz. Mounts vertically or horizontally on DIN rail. Pollution degree 2 (non-conductive dust only). Relative humidity 10 to 95%, non-condensing. Air pressure range 900 to 1060 hPa — fine for altitudes up to about 1000 m without derating.","metaTitle":"Siemens 3RK1908-0AP00-0KP0 SIMATIC BaseUnit, 1 DI, 24 V DC,","metaDescription":"Siemens 3RK1908-0AP00-0KP0 SIMATIC BaseUnit with 1 digital input, 24 V DC supply, 7 A ampacity, push-in terminals, DIN rail mount, Type 1 per EN 61131-2. Sourced to order against R","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Depth":"75 mm","Solid":"1x 0,5 ... 2,5 mm²","Width":"30 mm","Height":"215 mm","Upwards":"50 mm","Downwards":"50 mm","During Storage":"-40 ... +70 °C","lifecycle_stage":"current","Ampacity Maximum":"7 A","During Operation":"-25 ... +60 °C; For derating see manual","During Transport":"-40 ... +70 °C","Fastening Method":"DIN rail","Product Category":"Accessories","Shock Resistance":"6g / 11 ms","Mounting Position":"vertical, horizontal","at DC rated value":"24 V","Product Brand Name":"SIMATIC","Degree Of Pollution":"2","Maximum Permissible":"28.8 V","Minimum Permissible":"20.4 V","Product Designation":"BaseUnit","Vibration Resistance":"15 mm to 6 Hz; 2g to 500 Hz","for signal <1> at DC":"15 ... 30","Design Of The Product":"without AC/DC infeed, with F-DI infeed","with signal <0> at DC":"0 ... 5 V","For Main Current Circuit":"spring-loaded terminals (push-in)","Number Of Digital Inputs":"1","Single Or Multi-Stranded":"0.5 ... 2.5 mm²","Size Of The Screwdriver Tip":"Standard screwdriver 0.6 mm x 3.5 mm","Type Of Connecting Terminal":"Push-in terminal","Shape Of The Screwdriver Tip":"Slot","Type Of Input Characteristic":"Type 1 in accordance with EN 61131-2","Operating Voltage Rated Value":"500 V","Substance Prohibitance (Date)":"04/15/2016","Insulation Voltage Rated Value":"500 V","For Auxiliary And Control Circuit":"spring-loaded terminals (push-in)","Between Main And Auxiliary Circuit":"500 V","Relative Humidity During Operation":"10 ... 95 %","air pressure according to SN 31205":"900 ... 1 060 hPa","supply voltage 1 at DC rated value":"24 V","Surge Voltage Resistance Rated Value":"6 kV","Type Of Voltage Of The Supply Voltage":"DC","reference code according to IEC 81346-2":"Q","Finely Stranded With Core End Processing":"0.5 ... 2.5 mm²","Number Of Poles For Main Current Circuit":"3","Type Of Voltage Of The Operating Voltage":"AC","Finely Stranded Without Core End Processing":"0.5 ... 2.5 mm²","operational current at AC at 400 V rated value":"32 A; Derating, see Manual","Installation Altitude At Height Above Sea Level Maximum":"4 000 m; For derating see manual","AWG number at DC input as coded connectable conductor cross section":"20 ... 12","type of connectable conductor cross-sections at AWG cables for load-side outgoing feeder":"1x 20 ... 12"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$93.98","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=1389408&mlfb=3RK1908-0AP00-0KP0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1908-0AP00-0KP0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RK1908-0AP00-0KP0 and get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing confirmed at quote time."},{"question":"What wire size does the push-in terminal accept?","answer":"Solid or stranded wire from 0.5 to 2.5 mm². Release with a standard slot screwdriver, 0.6 mm x 3.5 mm tip."},{"question":"What is the input type per EN 61131-2?","answer":"Type 1 — designed for standard industrial proximity switches and pushbuttons, not the higher-threshold Type 2/3 variants."},{"question":"What are the mounting clearance requirements?","answer":"50 mm clearance required above and below the unit on the DIN rail for airflow and wiring access."},{"question":"Does this BaseUnit include AC/DC infeed?","answer":"No — it is designed without AC/DC infeed, with F-DI infeed only. The 24 V DC supply comes from the rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1908-0AP00-0KP0","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/3RK1908-0AP00-0KP0 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}}