{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1908-0AP00-0AP0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1908-0AP00-0AP0","canonicalUrl":"https://aoctrl.com/siemens/3RK1908-0AP00-0AP0","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1908-0AP00-0AP0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC BaseUnit, 3RK1908-0AP00-0AP0, for AC/DC feed-in, 7 A, 24 VDC, push-in terminals, DIN-rail mount.","salesMarkdown":"## What this BaseUnit does in a panel The Siemens 3RK1908-0AP00-0AP0 is a SIMATIC BaseUnit designed for AC/DC feed-in, serving as the power distribution backbone for a row of I/O modules on a DIN rail. It accepts a 24 VDC supply (20.4 V minimum, 28.8 V maximum) and distributes it to the connected modules at up to 7 A — enough for a modest I/O cluster, but watch the total draw if you are populating a dense string of high-current outputs. Pollution degree 2 means it is rated for normal industrial environments where only non-conductive pollution occurs (occasional condensation). ## Terminals and wiring Both the main current circuit and the auxiliary/control circuit use spring-loaded push-in terminals. Accepts 1x 0.5 to 2.5 mm² solid wire (or 1x 18 to 10 AWG for the supply). Standard 0.6 mm x 3.5 mm slot screwdriver for release. The push-in design saves time over screw clamps — strip to 8–10 mm, push in, done. Dimensions: 30 mm wide, 215 mm high, 75 mm deep. Mounts vertically or horizontally on DIN rail. Clearance above and below the unit is 50 mm each for airflow and wiring access. ## Environmental range Handles 10–95 % relative humidity non-condensing, and air pressure from 900 to 1060 hPa. Shock rated at 6g for 11 ms; vibration resistance is 15 mm at 6 Hz, then 2g up to 500 Hz. This is a panel-grade component — fine for most factory-floor environments, but not rated for direct washdown (no IP rating listed).","metaTitle":"Siemens 3RK1908-0AP00-0AP0 SIMATIC BaseUnit, 7 A, DIN Rail","metaDescription":"Siemens 3RK1908-0AP00-0AP0 SIMATIC BaseUnit for AC/DC feed-in. Rated 7 A, 24 VDC supply, push-in terminals, DIN-rail mount. Active production. Sourced to order.","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","title":"3RK1908-0AP00-0AP0","Height":"215 mm","Upwards":"50 mm","Downwards":"50 mm","description":"Base unit (BU30-MS1) For ET 200SP motor starter With infeed 24 V and 500 V Incl. infeed bus cover","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","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","Design Of The Product":"For AC/DC feed in","For Main Current Circuit":"spring-loaded terminals (push-in)","Number Of Digital Inputs":"0","at AWG cables for supply":"1x 18 ... 10","Size Of The Screwdriver Tip":"Standard screwdriver 0.6 mm x 3.5 mm","Type Of Connecting Terminal":"Push-in terminal","supply voltage of DC supply":"24 V","Shape Of The Screwdriver Tip":"Slot","Operating Voltage Rated Value":"500 V","Substance Prohibitance (Date)":"04/15/2016","Insulation Voltage Rated Value":"500 V","operating voltage of AC supply":"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":"1x 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":"1x 0,5 ... 2,5 mm²","operational current at AC at 400 V rated value":"32 A; Derating, see Manual","at the inputs for supply voltage at AWG cables solid":"1x 20 ... 12","Installation Altitude At Height Above Sea Level Maximum":"4 000 m; For derating see manual","type of connectable conductor cross-sections at AWG cables for load-side outgoing feeder":"1x 20 ... 12"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$86.36","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=567105&mlfb=3RK1908-0AP00-0AP0"},"ai":{"faq":[{"question":"What is the supply voltage and current rating for 3RK1908-0AP00-0AP0?","answer":"Supply voltage is 24 VDC (20.4 V min, 28.8 V max). Maximum ampacity is 7 A."},{"question":"What type of terminals does this BaseUnit use?","answer":"Push-in spring-loaded terminals for both main and auxiliary circuits. Accepts 0.5–2.5 mm² solid wire or 18–10 AWG for the supply."},{"question":"Where can I buy 3RK1908-0AP00-0AP0 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1908-0AP00-0AP0","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/3RK1908-0AP00-0AP0 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}}