{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1304-5KS40-2AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1304-5KS40-2AA0","canonicalUrl":"https://aoctrl.com/siemens/3RK1304-5KS40-2AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1304-5KS40-2AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC direct motor starter, 3RK1304-5KS40-2AA0, 24 V DC, IP65, Class 10, PROFINET/PROFIBUS DP, 100 kA at 400 V.","salesMarkdown":"The Siemens SIMATIC 3RK1304-5KS40-2AA0 is a direct motor starter in the SIMATIC motor starter family, designed for starting and protecting three-phase induction motors in industrial automation lines. Rated for 24 V DC control supply (20.4 to 28.8 V operating range) and switching up to 2 A at 400 V AC, with a short-circuit breaking capacity of 100 kA at 400 V. The enclosure is rated IP65, so the unit is dust-tight and protected against low-pressure water jets — suitable for washdown environments or outdoor cabinets where hose-down cleaning is routine. Mounting is by screw fixing, and the unit can be installed vertically or horizontally. Because it is active and widely specified, availability is generally good through independent distribution. There is no need to hunt for surplus or alternative cross-references on this code. ## Integration and I/O The starter includes 4 digital inputs (M12 socket) and 2 bytes of input and output data on the PROFINET or PROFIBUS DP fieldbus. That means it can report motor status (running, fault, overload) and accept start/stop commands directly over the network without a separate remote I/O module. The PROFINET and PROFIBUS DP protocols are both supported, so it fits into either Siemens S7 or third-party controller environments. Power dissipation is 3.888 W both with and without the bypass circuit active, so the thermal load on the cabinet is consistent regardless of operating state. The unit also has a vibration resistance of 2g and shock resistance of 15g / 11 ms, which is typical for industrial machine-mounted gear.","metaTitle":"Siemens SIMATIC 3RK1304-5KS40-2AA0 Motor Starter, 24 V DC, I","metaDescription":"Siemens SIMATIC 3RK1304-5KS40-2AA0 direct motor starter, 24 V DC, IP65, Class 10, 100 kA at 400 V. Current 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":"3RK1304-5KS40-2AA0","Height":"230 mm","Trip Class":"CLASS 10","description":"ET 200pro DSE HF DOL starter High Feature Mechanical switching Electronic overload protection AC-3, 0.9 kW / 400 V 0.15 A...2.00 A without brake contact 4 DI Han Q4/2 - Han Q8/0","Direct Start":"Yes","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":"No","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":"direct 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":"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":"No","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":"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":"No","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","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","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/1bfb39baefe5f872f186dc4140a7d5cc.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=518606&mlfb=3RK1304-5KS40-2AA0"},"ai":{"faq":[{"question":"Where can I buy 3RK1304-5KS40-2AA0 and what is the lead time?","answer":"We source and quote this part to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock count or lead-time number is published here."},{"question":"What are the key ratings of 3RK1304-5KS40-2AA0?","answer":"It is a direct motor starter with Trip Class 10, rated 24 V DC control supply (20.4–28.8 V), switching 2 A at 400 V AC, with a short-circuit breaking capacity of 100 kA at 400 V. Enclosure is IP65."},{"question":"Does 3RK1304-5KS40-2AA0 support PROFINET or PROFIBUS?","answer":"Yes, it supports both PROFINET and PROFIBUS DP protocols, with 2 bytes of input and output data and 4 digital inputs via M12 socket."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1304-5KS40-2AA0","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/3RK1304-5KS40-2AA0 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}}