{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1205-0BQ21-0AA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1205-0BQ21-0AA3","canonicalUrl":"https://aoctrl.com/siemens/3RK1205-0BQ21-0AA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1205-0BQ21-0AA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RK1205-0BQ21-0AA3 — now in phase-out and being discontinued. Supplied from remaining channel stock; full specifications, lifecycle and same-series options are below.","salesMarkdown":"## Overview The 3RK1205-0BQ21-0AA3 is a Siemens ASIsafe compact module K45F LS Type 2 (light sensor) for testing semiconductor outputs. It provides 2 electronic inputs and draws sensor supply directly from the AS-i network, with a maximum current carrying capacity of 200 mA. The module is rated IP67 for harsh environments and mounts on standard rail or wall using a separate mounting plate (3RK1901-2EA00 or 3RK1901-2DA00, ordered separately). This compact module integrates two electronic inputs for light-sensor testing of semiconductor outputs. The sensor supply is drawn from the AS-i bus, eliminating the need for a separate power feed to the sensor head. The module's front addressing socket allows configuration of the AS-i address, and status is indicated via yellow LEDs for I/O state and a green/red LED for module health. The switching levels are defined as low at 5 V and high at 15 V, with a supply voltage of 31.5 V DC. The module draws 0.005 A from the AS-i line, keeping the bus load low. Three M12 I/O sockets provide the connection points for sensors and actuators. A flat male tab (2.8 mm width) serves as the ground terminal. The module is addressed via the front socket using an AS-i addressing tool.","metaTitle":"Siemens 3RK1205-0BQ21-0AA3 ASIsafe Compact Module K45F LS Type 2","metaDescription":"Siemens 3RK1205-0BQ21-0AA3 ASIsafe compact module K45F LS Type 2 (light sensor), 2 electronic inputs, IP67, 31.5 V DC, phase-out since 2022-10-01.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Depth":"34mm","Width":"45mm","Height":"80mm","Sensors":"electronic input","Addressing":"front addressing socket","ID/ID2 code":"B/1","During Storage":"-40 ... +85°C","Ground terminal":"Flat male tab, 2.8mm width","display of I/Os":"yellow LED","lifecycle_stage":"current","During Operation":"-25 ... +70°C","Fastening Method":"standard rail mounting/wall mounting using mounting plate for K45 compact module","I/O configuration":"0","Number I/O sockets":"3","protection class IP":"IP67","switching level Low":"5","switching level High":"15","Design Of The Product":"Safe compact module K45F LS, TYPE2","Type Of Voltage Of Output Voltages":"DC","display of AS-Interface/diagnostics":"green/red LED","AS interface total current input max":"270mA","reference code acc. to DIN EN 61346-2":"A","Number Of Digital Inputs Safety-Related":"2","protocol is supported AS-Interface protocol":"Yes","Input Current At Digital Input For Signal <1> Minimum":"5mA","Type Of Electrical Connection Of The Inputs And Outputs":"M12","operating voltage according to AS-Interface spezification":"26.5 ... 31.5V"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$175.26","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=169587&mlfb=3RK1205-0BQ21-0AA3","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1205-0BQ21-0AA3/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1205-0BQ21-0AA3","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/3RK1205-0BQ21-0AA3 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}}