{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1908-0AP00-0BH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1908-0AP00-0BH0","canonicalUrl":"https://aoctrl.com/siemens/3RK1908-0AP00-0BH0","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1908-0AP00-0BH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC BaseUnit 3RK1908-0AP00-0BH0, for DC feed in, 24 VDC supply, 7 A, push-in terminals, DIN-rail mount, 30 x 215 x 75 mm.","salesMarkdown":"## What This BaseUnit Does in a Panel The Siemens 3RK1908-0AP00-0BH0 is a SIMATIC BaseUnit designed specifically for DC feed-in in an automation cabinet. It distributes a 24 VDC supply (rated 20.4 V minimum, 28.8 V maximum) to the modules mounted above it on a standard DIN rail, with a maximum ampacity of 7 A. That 7 A is the total current the BaseUnit can pass to the downstream I/O slices — size your module load so the sum across all connected slices stays under that figure, or you'll need a second feed point. The push-in terminals (spring-loaded, main and auxiliary/control circuits) accept solid or finely stranded wire 1x 0.5 to 2.5 mm²; a standard slot screwdriver 0.6 x 3.5 mm opens the clamp. Mounting position can be vertical or horizontal, and the 30 mm width means it takes up one standard slot on the rail. Pollution degree 2 — normal factory floor, not conductive dust or condensation. Shock resistance is 6g for 11 ms; vibration resistance is 15 mm amplitude to 6 Hz, then 2g to 500 Hz. That covers most conveyor and machine-tool environments. Clearance above and below the unit is 50 mm each side for airflow and wiring access.","metaTitle":"Siemens 3RK1908-0AP00-0BH0 SIMATIC BaseUnit, 24 VDC, 7 A, DI","metaDescription":"Siemens 3RK1908-0AP00-0BH0 SIMATIC BaseUnit for DC feed-in. 24 VDC supply, 7 A ampacity, push-in terminals, DIN-rail mount. Active production. Quoted 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":"3RK1908-0AP00-0BH0","Height":"215 mm","Upwards":"50 mm","Downwards":"50 mm","description":"Base unit for ET 200SP motor starter for use in the ET 200SP HA system with infeed 24 V","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":"standard 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 DC feed in","For Main Current Circuit":"spring-loaded terminals (push-in)","Number Of Digital Inputs":"0","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","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":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=1389530&mlfb=3RK1908-0AP00-0BH0"},"ai":{"faq":[{"question":"What is the depth of 3RK1908-0AP00-0BH0?","answer":"The depth is 75 mm. Combined with the 30 mm width and 215 mm height, it occupies one standard DIN-rail slot with 50 mm clearance needed above and below."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1908-0AP00-0BH0","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/3RK1908-0AP00-0BH0 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}}