{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1304-5KS70-3AA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1304-5KS70-3AA3","canonicalUrl":"https://aoctrl.com/siemens/3RK1304-5KS70-3AA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1304-5KS70-3AA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC reversing motor starter, 3RK1304-5KS70-3AA3, 24 V DC control, 2 A at 400 V AC, 100 kA SCCR, IP65, adjustable trip class 5/10/20/30, PROFINET.","salesMarkdown":"## SIMATIC reversing starter with integrated communication The Siemens SIMATIC 3RK1304-5KS70-3AA3 is a fully integrated reversing motor starter in the SIMATIC motor starters family, designed for direct-on-line reversing control of three-phase motors up to 2 A at 400 V AC. The 24 V DC control supply (20.4 to 28.8 V range) keeps it compatible with standard PLC outputs. This unit is a reversing starter, so it handles forward/reverse motor direction without external contactor interlocking. It supports both PROFINET and PROFIBUS DP protocols, making it straightforward to drop into a SIMATIC S7 or third-party controller network. The IP65 enclosure means the entire assembly is washdown-rated — suitable for food-and-bev lines or wet process areas where dust and hose-down are routine. ## Adjustable trip class and digital I/O The trip class is field-selectable among CLASS 5, 10, 20, and 30. This lets you match the overload protection to the motor's thermal time constant — CLASS 10 for standard induction motors, CLASS 20 for high-inertia loads like fans or centrifuges, CLASS 30 for very long start-up times. It is not a direct-start device, meaning the starter expects a separate control signal to initiate each direction. Four digital inputs are provided via M12 sockets, which handle start/stop and direction commands from sensors or pushbuttons. The I/O mapping occupies 2 bytes each for inputs and outputs on the fieldbus, which is a compact footprint for the controller's process image. No brake control output is included; if you need a holding brake, add an external relay. Mounts via screw fixing in either vertical or horizontal orientation. Dimensions are 230 mm height, 110 mm width, 160 mm depth — it occupies a compact footprint for a reversing starter with integrated bus interface. The enclosure is rated IP65, so it can be mounted directly on the machine frame without a separate panel, as long as the ambient stays within -25 to +55 °C operating and -40 to +70 °C storage/transport.","metaTitle":"Siemens SIMATIC 3RK1304-5KS70-3AA3 Reversing Motor Starter,","metaDescription":"Siemens SIMATIC 3RK1304-5KS70-3AA3 reversing motor starter. 24 V DC, 2 A at 400 V AC, 100 kA SCCR. IP65. Adjustable trip class 5/10/20/30. Active production. Available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Depth":"160 mm","Width":"110 mm","at DC":"24 ... 24 V","Height":"230 mm","Trip Class":"CLASS 5, 10, 20 and 30 adjustable","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":"3.168 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":"3.168 W","supply voltage 1 at DC":"24 ... 24 V","Number Of Digital Inputs":"4","For Digital Input Signals":"4","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":"full motor protection","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":"Yes","Insulation Voltage Rated Value":"400 V","Design Of The Switching Contact":"solid-state / thyristor / 2 phases","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":"480 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":"$533.40","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=319112&mlfb=3RK1304-5KS70-3AA3","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1304-5KS70-3AA3/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1304-5KS70-3AA3","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/3RK1304-5KS70-3AA3 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}}