{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1304-5LS40-3AA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1304-5LS40-3AA3","canonicalUrl":"https://aoctrl.com/siemens/3RK1304-5LS40-3AA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1304-5LS40-3AA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC 3RK1304-5LS40-3AA3 reversing motor starter, IP65, 12 A at 400 V AC, CLASS 10, PROFINET and PROFIBUS DP, 4 digital inputs, 150 x 110 x 230 mm.","salesMarkdown":"## IP65 reversing motor starter with dual-fieldbus connectivity The 3RK1304-5LS40-3AA3: This SIMATIC motor starter is a reversing starter — it handles forward and reverse motor direction control directly, without external contactor interlocking. The IP65 enclosure means it mounts directly on the machine frame in washdown zones, not inside a separate control panel. It supports both PROFINET and PROFIBUS DP protocols natively, so it drops into either fieldbus architecture without an additional gateway. The 4 digital inputs (M12 socket) and 2-byte input/output process data map directly into the controller's I/O image. ## Rated for motor protection and fault interruption The breaking capacity of 100,000 A at 400 V ensures it can interrupt high-fault-current events without upstream damage. Supply voltage range is 20.4 to 28.8 V DC (nominal 24 V DC), with the control logic powered from the same rail. Power dissipation is 3.888 W both with and without the bypass circuit engaged, so thermal management in the enclosure is consistent regardless of operating state. ## Physical fit and environmental ratings Dimensions are 150 mm deep, 110 mm wide, 230 mm high — this is a compact footprint for a reversing starter with integrated fieldbus. Rated IP65, with degree of pollution 3 (conductive pollution typical in industrial environments). Vibration resistance is 2g, shock resistance 15g for 11 ms — this holds up on moving machine axes or near press equipment.","metaTitle":"Siemens 3RK1304-5LS40-3AA3 SIMATIC Motor Starter, IP65","metaDescription":"Siemens 3RK1304-5LS40-3AA3 SIMATIC motor starter, reversing type, IP65, 12 A at 400 V, CLASS 10, PROFINET/PROFIBUS DP. Active production, quoted 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":"3RK1304-5LS40-3AA3","Height":"230 mm","Trip Class":"CLASS 10","description":"ET 200pro RSE HF Reversing starter High Feature Mechanical switching Electronic overload protection AC-3, 5.5 kW / 400 V 1.50 A...12.00 A Brake contact 400 V AC 4 DI 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":"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":"solid-state","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":"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":"1.5 ... 12 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/830a62c25c35bd1124fedd2c79983538.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=502932&mlfb=3RK1304-5LS40-3AA3"},"ai":{"faq":[{"question":"What fieldbus protocols does this motor starter support?","answer":"It supports both PROFINET and PROFIBUS DP protocols, allowing direct integration into either fieldbus architecture without additional gateways or couplers."},{"question":"What is the physical size and mounting method?","answer":"Dimensions are 150 mm depth, 110 mm width, 230 mm height. Mounting is by screw fixing, and the unit can be installed in either vertical or horizontal orientation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1304-5LS40-3AA3","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/3RK1304-5LS40-3AA3 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}}