{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1304-5LS70-3AA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1304-5LS70-3AA3","canonicalUrl":"https://aoctrl.com/siemens/3RK1304-5LS70-3AA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1304-5LS70-3AA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC 3RK1304-5LS70-3AA3 reversing motor starter, 12 A at 400 V AC, 100 kA breaking capacity, IP65, PROFIBUS DP and PROFINET, adjustable trip class 5/10/20/30.","salesMarkdown":"## What this SIMATIC reversing starter is It's designed to reverse a three-phase motor on command, not just start and stop it; the reversing contactor pair is built in, so you get forward and reverse switching without external interlocks. Trip class is adjustable across CLASS 5, 10, 20, and 30, so you can dial in the overload curve to match the motor's starting profile — class 10 for a pump, class 20 for a high-inertia fan. The IP65 enclosure seals the electronics and contacts against hose-directed water and dust ingress — this unit lives on the machine, not inside a clean control cabinet. Mounting is via screw fixing in either vertical or horizontal orientation, with dimensions of 230 mm high, 110 mm wide, and 160 mm deep. The power connection uses a socket per ISO23570, a standardized M12-style interface for the main infeed. ## Fieldbus and I/O integration This starter speaks both PROFIBUS DP and PROFINET — it's not just a motor switch, it's a distributed I/O device on the network. It provides 4 digital inputs via M12 sockets, giving you local sensor feedback without a separate remote I/O block. The I/O image uses 2 bytes of input data and 2 bytes of output data. Supply voltage is 24 V DC nominal, with a permissible range of 20.4 to 28.8 V.","metaTitle":"Siemens 3RK1304-5LS70-3AA3 SIMATIC Motor Starter, Reversing,","metaDescription":"Siemens 3RK1304-5LS70-3AA3 SIMATIC reversing motor starter, 12 A rated at 400 V AC, 100 kA breaking capacity, adjustable trip class 5-30, IP65, PROFIBUS & PROFINET. Currently in ac","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":"6.84 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":"5.328 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":"12 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":"5 500 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":"1.5 ... 12 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$585.47","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=533598&mlfb=3RK1304-5LS70-3AA3","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1304-5LS70-3AA3/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings I need to check for fit?","answer":"The critical ratings are 12 A at 400 V AC for motor current, 100 kA breaking capacity at 400 V, and adjustable trip class 5/10/20/30. The enclosure is IP65, and it operates on 24 V DC (20.4–28.8 V). It supports PROFIBUS DP and PROFINET."},{"question":"Will this fit in a panel designed for a standard contactor?","answer":"No — this is a self-contained IP65 unit with screw fixing, not a DIN-rail contactor. Its dimensions are 230 x 110 x 160 mm and it connects via an ISO23570 socket for the main power. It's designed for machine-mount, not cabinet-internal mounting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1304-5LS70-3AA3","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/3RK1304-5LS70-3AA3 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}}