{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1304-5KS40-5AA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1304-5KS40-5AA3","canonicalUrl":"https://aoctrl.com/siemens/3RK1304-5KS40-5AA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1304-5KS40-5AA3","rawCanonicalId":null},"summary":{"shortDescription":"SIMATIC, reversing motor starter, 3RK1304-5KS40-5AA3, IP65, CLASS 10, PROFINET, PROFIBUS DP, 2 A at 400 V, 24 V DC control.","salesMarkdown":"The 3RK1304-5KS40-5AA3 is a SIMATIC-branded reversing motor starter — a single enclosure that handles forward/reverse motor control in one package. Control voltage is 24 V DC nominal, with a permissible range of 20.4 to 28.8 V DC. The unit draws its power from a socket conforming to ISO 23570 for the main energy infeed, which standardizes the connector interface across this starter family. ## Fieldbus and I/O This reversing starter supports both PROFINET and PROFIBUS DP protocols, so it drops into either a Siemens S7 control architecture or a mixed-vendor network with a gateway. The digital I/O is handled through M12 sockets — 2 bytes of inputs and 2 bytes of outputs, which is enough for basic status feedback and control interlocks without a separate remote I/O block. Mounts via screw fixing in either vertical or horizontal orientation, which gives flexibility when fitting into tight machine frames. The enclosure measures 230 mm high, 110 mm wide, and 150 mm deep — that's another SKU I don't need to worry about panel space for, since it's self-contained. It handles 15g shock at 11 ms and 2g continuous vibration, so it's built for the shock and vibe you see on press lines, conveyors, and packaging machinery.","metaTitle":"SIMATIC 3RK1304-5KS40-5AA3 Reversing Motor Starter, IP65, CL","metaDescription":"SIMATIC 3RK1304-5KS40-5AA3 reversing motor starter. IP65, CLASS 10 trip, PROFINET/PROFIBUS DP, 2 A at 400 V. 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":"150 mm","Width":"110 mm","at DC":"24 ... 24 V","title":"3RK1304-5KS40-5AA3","Height":"230 mm","Trip Class":"CLASS 10","description":"ET 200pro RSE ST Reversing starter standard Mechanical switching Electronic overload protection AC-3, 0.9 kW / 400 V 0.15 A...2.00 A Brake contact 400 V AC Han Q4/2 - Han Q8/0","Direct Start":"No","Of The Inputs":"2 byte","During Storage":"-40 ... +70 °C","Of The Outputs":"2 byte","Type Of Voltage":"AC","lifecycle_stage":"current","During Operation":"-25 ... +55 °C","During Transport":"-40 ... +70 °C","Fastening Method":"screw fixing","Reverse Starting":"Yes","Shock Resistance":"15g / 11 ms","Mounting Position":"vertical, horizontal","PROFINET protocol":"Yes","at DC rated value":"20.4 ... 28.8 V","Product Brand Name":"SIMATIC","Type Of Assignment":"1","Degree Of Pollution":"3","Maximum Permissible":"28.8 V","Minimum Permissible":"20.4 V","Product Designation":"Motor starters","With Bypass Circuit":"3.888 W","protection class IP":"IP65","PROFIBUS DP protocol":"Yes","Vibration Resistance":"2g","at 400 V rated value":"100 000 A","Design Of The Product":"reversing starter","For Main Energy Infeed":"socket according to ISO23570","Without Bypass Circuit":"3.888 W","supply voltage 1 at DC":"24 ... 24 V","Number Of Digital Inputs":"0","For Digital Input Signals":"0","For Digital Output Signals":"0","at AC at 400 V rated value":"2 A","brake control with 24 V DC":"No","1 For Digital Input Signals":"M12 socket","2 For Digital Input Signals":"M12 socket","3 For Digital Input Signals":"M12 socket","4 For Digital Input Signals":"M12 socket","brake control with 180 V DC":"No","brake control with 230 V AC":"No","brake control with 400 V AC":"Yes","brake control with 500 V DC":"No","For Main Energy Transmission":"socket according to ISO23570","For Supply Voltage Line-Side":"via backplane bus","Type Of The Motor Protection":"solid-state","at AC-3 at 400 V rated value":"900 W","For Load-Side Outgoing Feeder":"socket according to ISO23570","Operating Voltage Rated Value":"200 ... 400 V","Substance Prohibitance (Date)":"05/01/2012","supports PROFIenergy shutdown":"Yes","Digital Inputs Parameterizable":"No","Insulation Voltage Rated Value":"400 V","Design Of The Switching Contact":"electromechanical","Digital Outputs Parameterizable":"No","For Supply Voltage Transmission":"via backplane bus","Design Of Short-Circuit Protection":"fuse","Product Function Bus Communication":"Yes","Product Function On-Site Operation":"Yes","Relative Humidity During Operation":"5 ... 95 %","Product Component Motor Brake Output":"Yes","Surge Voltage Resistance Rated Value":"6 kV","supports PROFIenergy measured values":"Yes","Type Of Voltage Of The Supply Voltage":"DC","reference code according to IEC 81346-2":"Q","Number Of Poles For Main Current Circuit":"3","control supply voltage at DC rated value":"20.4 ... 28.8 V","Product Function Short Circuit Protection":"Yes","Supply Voltage For Brake Control Required":"400 V","Touch Protection Against Electrical Shock":"finger-safe","design of the interface PROFINET protocol":"Yes","with low demand rate according to SN 31920":"100 FIT","protocol is supported AS-Interface protocol":"No","with high demand rate according to SN 31920":"75 %","At The Manufacturer-Specific Device Interface":"optical interface","Type Of Voltage Of The Control Supply Voltage":"DC","Type Of Electrical Connection For Main Current Circuit":"tab terminals","Installation Altitude At Height Above Sea Level Maximum":"3 500 m","Type Of Electrical Connection Of The Communication Interface":"via backplane bus","Type Of Voltage Of The Supply Voltage For Brake Control Required":"AC","operating range relative to the operating voltage at AC at 50 Hz":"200 ... 440 V","operating voltage at AC at 60 Hz according to CSA and UL rated value":"600 V","Mechanical Service Life (Operating Cycles) Of The Main Contacts Typical":"30 000 000","Maximum Permissible Voltage For Safe Isolation Between Main And Auxiliary Circuit":"400 V","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"0.15 ... 2 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$358.14","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ede0f4a66990facd177ce8855f303fad.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=88173&mlfb=3RK1304-5KS40-5AA3"},"ai":{"faq":[{"question":"What are the key ratings for this reversing starter?","answer":"Rated 2 A at 400 V AC with CLASS 10 overload protection. Control voltage is 24 V DC (20.4 to 28.8 V DC permissible). Enclosure is IP65. Supports PROFINET and PROFIBUS DP."},{"question":"What are the physical dimensions?","answer":"230 mm high, 110 mm wide, 150 mm deep. Mounts via screw fixing in vertical or horizontal position."},{"question":"Does it require a separate cabinet or enclosure?","answer":"No — the IP65 rating means it's self-enclosed and suitable for direct machine-mount in washdown or dusty environments. No additional panel enclosure needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1304-5KS40-5AA3","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/3RK1304-5KS40-5AA3 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}}