{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1304-5LS40-4AA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1304-5LS40-4AA3","canonicalUrl":"https://aoctrl.com/siemens/3RK1304-5LS40-4AA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1304-5LS40-4AA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC ET 200pro motor starter, 3RK1304-5LS40-4AA3, IP65 direct starter with PROFINET, 12 A at 400 V AC, Trip Class 10, 100 kA SCCR.","salesMarkdown":"The Siemens SIMATIC 3RK1304-5LS40-4AA3 is a direct motor starter from the ET 200pro family, built for distributed motor control in IP65-rated enclosures. It integrates the starter, overload protection, and fieldbus connection into one package, so you skip the control cabinet and mount it directly on the machine frame or conveyor section. Rated for 12 A at 400 V AC with a Trip Class 10 thermal overload curve, it handles standard induction motors up to roughly 5.5 kW (7.5 hp) on a 400 V three-phase line. Communication runs on PROFINET and PROFIBUS DP, so it drops into Siemens S7 and third-party controllers that speak either protocol. The 2-byte input and 2-byte output process data map covers start/stop, fault reset, and status feedback without chewing up I/O on a remote rack. IP65 protection means the housing is dust-tight and protected against water jets — rated for washdown environments on food, beverage, or packaging lines. No separate control cabinet needed; mount it via screw fixing in any orientation (vertical or horizontal) as long as the cable glands face downward. Shock resistance of 15 g for 11 ms and vibration resistance of 2 g mean it survives on vibrating conveyors, press feeders, or mobile equipment. No derating needed for normal industrial shock and vibration profiles. The 24 V DC control supply accepts 20.4 to 28.8 V, so it runs on standard 24 V industrial power supplies with tolerance for voltage drop on long cable runs. Power dissipation is 3.888 W with or without the bypass circuit engaged — negligible heat for IP65 enclosures. ## Integration notes for the controls engineer The main power infeed uses an ISO 23570 socket — a standardized 4-pin connector for distributed motor starters. The digital input signals arrive via M12 socket, the standard fieldbus connector for IP65-rated devices. No terminal block wiring inside the enclosure; it's all plug-and-play connectors. This is a direct starter only — no reversing function, no brake control. If your application needs reversing, you'll need two of these units or a different variant. The 0 digital inputs and 0 digital outputs on the module itself mean all control signals come over the fieldbus; there are no local I/O points on this unit. Dimensions are 230 mm high, 110 mm wide, 150 mm deep — compact enough to mount on a machine frame or a small sub-panel. The screw fixing pattern is standard for the ET 200pro family, so it shares mounting holes with other modules in the series.","metaTitle":"Siemens SIMATIC 3RK1304-5LS40-4AA3 Motor Starter, IP65, PROF","metaDescription":"Siemens SIMATIC 3RK1304-5LS40-4AA3 direct motor starter. IP65, PROFINET, Trip Class 10, 12A at 400V AC, 100kA SCCR. Current 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":"3RK1304-5LS40-4AA3","Height":"230 mm","Trip Class":"CLASS 10","description":"ET 200pro DSE ST DOL starter Standard Mechanical switching Electronic overload protection AC-3, 5.5 kW / 400 V 1.50 A...12.00 A Brake contact 400 V AC 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":"0","For Digital Input Signals":"0","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":"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":"1.5 ... 12 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7caab17c1f7fa85f9ccdc43c7e6bf532.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=17550&mlfb=3RK1304-5LS40-4AA3"},"ai":{"faq":[{"question":"What are the key ratings for this motor starter?","answer":"Rated 12 A at 400 V AC, Trip Class 10 overload protection, 100 kA SCCR at 400 V, IP65 enclosure, PROFINET and PROFIBUS DP communication, 24 V DC control supply (20.4-28.8 V range)."},{"question":"Can this part replace a standard panel-mounted contactor + overload?","answer":"It replaces the function but not the form factor. This is an IP65 distributed starter with fieldbus connectors — it mounts on the machine, not in a cabinet. You'll need the ISO 23570 power cable and M12 signal cables, not terminal block wiring."},{"question":"What compliance documentation is available?","answer":"As a Siemens SIMATIC product, it carries CE marking for the European market and is designed to relevant IEC/EN standards for motor starters. Specific RoHS and REACH declarations are available through Siemens Industry Online Support."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1304-5LS40-4AA3","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/3RK1304-5LS40-4AA3 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}}