{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1908-0AP00-0AH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1908-0AP00-0AH0","canonicalUrl":"https://aoctrl.com/siemens/3RK1908-0AP00-0AH0","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1908-0AP00-0AH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC BaseUnit, 3RK1908-0AP00-0AH0, for AC/DC feed-in, DIN rail mount, push-in terminals, 7 A, 24 V DC.","salesMarkdown":"The Siemens SIMATIC 3RK1908-0AP00-0AH0 is a BaseUnit designed for AC/DC feed-in in a control panel. Rated for 24 V DC supply with a maximum ampacity of 7 A, it feeds power into the backplane of a SIMATIC I/O or safety system. The 30 mm width and 215 mm height keep it compact on the rail; the 75 mm depth means it clears most enclosure doors without a deep gland plate. The 7 A ampacity is the total current the BaseUnit can carry through its feed-in path — not per-channel, but the sum feeding downstream modules. If your I/O rack pulls more than 7 A at 24 V DC, you need a second feed-in point or a higher-rated BaseUnit. The 20.4 V minimum permissible supply means the unit holds regulation down to that floor; below that, outputs may drop out. Push-in terminals accept solid wire from 0.5 to 2.5 mm² (AWG 18 to 10). That covers standard control wiring for 24 V DC circuits. The spring-loaded design on both main and auxiliary circuits means consistent contact pressure over vibration cycles — rated for 15 mm at 6 Hz and 2g up to 500 Hz, plus 6g shock at 11 ms. That's enough for most conveyor lines and machine tools. Mounts vertically or horizontally on DIN rail. Operating temperature range is -25 to +60 °C with derating above 40 °C per the manual; storage range is -40 to +70 °C. Relative humidity tolerance of 10 to 95 % means it handles condensation-prone enclosures without conformal coating. The screwdriver slot for the push-in release is a standard 0.6 mm x 3.5 mm flathead — nothing exotic. Pollution degree 2 rating suits typical industrial control panels (non-conductive pollution, occasional condensation). Air pressure range of 900 to 1060 hPa covers altitudes up to about 1000 m without derating.","metaTitle":"Siemens 3RK1908-0AP00-0AH0 SIMATIC BaseUnit, 7 A, 24 V DC","metaDescription":"Siemens SIMATIC 3RK1908-0AP00-0AH0 BaseUnit for AC/DC feed-in. DIN rail mount, push-in terminals, 7 A max, 24 V DC supply. Current lifecycle stage. 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":"3RK1908-0AP00-0AH0","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 and 500 V including 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","for 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 for 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 for 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=1389404&mlfb=3RK1908-0AP00-0AH0"},"ai":{"faq":[{"question":"What wire sizes does the push-in terminal accept?","answer":"Solid wire from 0.5 to 2.5 mm² (AWG 18 to 10). The spring-loaded push-in design requires no screwdriver for the wire; a 0.6 mm x 3.5 mm slot screwdriver is used only for release."},{"question":"What is the supply voltage and current rating?","answer":"Rated for 24 V DC supply (20.4 V minimum, 28.8 V maximum) with a maximum ampacity of 7 A. The 7 A is the total feed-in current for the backplane, not per-channel."},{"question":"What environmental conditions can it handle?","answer":"Operating temperature -25 to +60 °C (derate above 40 °C), storage -40 to +70 °C. Humidity 10 to 95 %. Vibration rated to 15 mm at 6 Hz and 2g to 500 Hz; shock 6g at 11 ms. Pollution degree 2."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1908-0AP00-0AH0","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/3RK1908-0AP00-0AH0 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}}