{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1405-1BQ20-0AA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1405-1BQ20-0AA3","canonicalUrl":"https://aoctrl.com/siemens/3RK1405-1BQ20-0AA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1405-1BQ20-0AA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens ASIsafe K45F, 2 safe inputs for mechanical contacts, 2 standard solid-state outputs, IP67, 4x M12, Uaux 24 V DC.","salesMarkdown":"## ASIsafe compact module for mechanical sensors The Siemens 3RK1405-1BQ20-0AA3 is an ASIsafe compact module in the K45F form factor, carrying 2 safety-related digital inputs for mechanical switching contacts and 2 standard solid-state digital outputs powered from a separate 24 V DC auxiliary supply (Uaux). Rated IP67, the module survives washdown environments — the housing and M12 connectors seal against hose-directed water and dust ingress, making it suitable for food, beverage, or wet process lines where a safety-rated I/O drop is needed close to the hazard zone. Each safety input draws a minimum of 5 mA at the high signal level (contact closed) and reads the low level as contact open — designed for dry-contact mechanical switches or E-stops with no external pull-up resistor. The watchdog and short-circuit protection are built in, so no extra safety relay is required on the input side. Mounts on standard DIN rail or to a wall using a separate mounting plate (3RK1901-2EA00 or 3RK1901-2DA00, ordered separately). The 15 mm wide, 80 mm tall, 34 mm deep footprint fits tight panel layouts alongside other K45 compact modules. Four M12 sockets handle I/O connections — inputs use special pin assignment for safety wiring, outputs follow standard assignment. Front addressing socket accepts AS-i bus master programmer. Status indication is via yellow LEDs per I/O point, a green LED for the auxiliary supply, and a combined green/red LED for AS-Interface bus and diagnostics. The AS-i protocol is supported natively, drawing up to 70 mA from the bus for its own electronics. ## Electrical ratings and operating range Operates on the AS-Interface bus voltage of 26.5 to 31.5 V DC per the AS-i specification. The standard outputs are rated at 2 A each, solid-state, short-circuit-proof, and require a separate 24 V DC auxiliary supply via the AUX POWER pins. The I/O configuration code is set to 7, with 4 I/O sockets on the module.","metaTitle":"Siemens 3RK1405-1BQ20-0AA3 ASIsafe K45F, 2F-DI/2DO, IP67","metaDescription":"Siemens 3RK1405-1BQ20-0AA3 ASIsafe compact module: 2 safe inputs, 2 standard solid-state outputs, IP67, M12, current production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Type":"2 inputs, safe, 2 outputs, standard with Uaux","Depth":"34mm","Width":"15mm","title":"3RK1405-1BQ20-0AA3","Height":"80mm","Sensors":"mechanical switching contact","Watchdog":"built-in","Addressing":"front addressing socket","ID/ID2 code":"B/0","description":"ASIsafe compact module K45F digital safety, 2 F-DI/2 DQ, IP67 2 x input for mechanical sensors 2 x standard output 24 V DC Output supply from 24 V DC 4 x M12 socket Mounting plate 3RK1901-2EA00 or 3RK1901-2DA00 must be ordered separately","During Storage":"-40 ... +85°C","display of I/Os":"yellow LED","display of Uaux":"green 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":"7","Number I/O sockets":"4","protection class IP":"IP67","switching level Low":"contact open","Induction Protection":"built-in","switching level High":"contact closed","Design Of The Product":"Safe compact module K45F, 2F-DI/2DO, Uaux","Short-Ciruit Protection":"built-in","Type Of Switching Output":"solid state","Number Of Digital Outputs":"2","Type Of Voltage Of Output Voltages":"DC","display of AS-Interface/diagnostics":"green/red LED","AS interface total current input max":"70mA","Outputs external power supply 24 V DC":"via AUX POWER","reference code according to EN 61346-2":"A","Number Of Digital Inputs Safety-Related":"2","Design Of The Pin Assignment Of The Inputs":"special assignement","Property Of The Output Short-Circuit Proof":"Yes","Design Of The Pin Assignment Of The Outputs":"standard assignement","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","Output Current At Digital Output For Signal <1> Rated Value":"2A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$133.35","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a873b202043671ab18e355e941670a95.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=241882&mlfb=3RK1405-1BQ20-0AA3"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1405-1BQ20-0AA3","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/3RK1405-1BQ20-0AA3 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}}