{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1304-5LS70-3AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1304-5LS70-3AA0","canonicalUrl":"https://aoctrl.com/siemens/3RK1304-5LS70-3AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1304-5LS70-3AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIMATIC motor starter, reversing design, 3RK1304-5LS70-3AA0, 12 A at 400 V AC, adjustable trip class 5/10/20/30, IP65, PROFINET and PROFIBUS DP.","salesMarkdown":"The Siemens 3RK1304-5LS70-3AA0 is a SIMATIC-brand reversing motor starter — a self-contained unit that combines a contactor, overload relay, and reversing functionality in one IP65 enclosure. The trip class is field-adjustable between CLASS 5, 10, 20, and 30, so you can match the thermal protection to the motor's start-up profile — a pump with a long acceleration ramp gets CLASS 20 or 30, a fast-cycling conveyor gets CLASS 10 or 5. The unit communicates over PROFINET and PROFIBUS DP, giving you direct fieldbus integration without a separate gateway. It carries 4 digital inputs (M12 socket) and no digital outputs — the outputs are 2 bytes of process data on the bus. The 24 V DC control supply is rated 20.4 to 28.8 V, so it's tolerant of a sagging 24 V bus in a long daisy-chain. This is a screw-fixed, IP65-rated enclosure (230 × 110 × 160 mm), so it mounts directly on a machine frame or wall — no DIN-rail panel required. Mounting position is vertical or horizontal, which gives flexibility in tight machine compartments. The main energy infeed uses a socket per ISO 23570, so the power cable connection is standardized. Vibration resistance is 2g; shock resistance is 15g at 11 ms — it holds up on a vibrating pump skid or a press feed. The adjustable trip class (5/10/20/30) sets the overload relay's thermal memory: CLASS 5 trips fastest (for submersible pumps or compressors that start unloaded), CLASS 30 allows the longest start time (for high-inertia loads like centrifuges or large fans). The 4 digital inputs are 24 V DC, M12 socket, and the 2-byte input/output process data maps directly to PROFINET or PROFIBUS cyclic telegrams. If your PLC expects a specific I/O byte layout, check the GSD file before commissioning — the input/output byte assignment is fixed at 1 (type of assignment).","metaTitle":"Siemens 3RK1304-5LS70-3AA0 SIMATIC Motor Starter, Reversing,","metaDescription":"Siemens SIMATIC 3RK1304-5LS70-3AA0 reversing motor starter. 12A at 400V AC, adjustable trip class 5/10/20/30, IP65, PROFINET/PROFIBUS. 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":"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":"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":"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":"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":"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":"$541.02","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=268296&mlfb=3RK1304-5LS70-3AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1304-5LS70-3AA0/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for this reversing starter?","answer":"Rated operational current is 12 A at 400 V AC for motor duty. Breaking capacity is 100 kA at 400 V. Trip class is adjustable between 5, 10, 20, and 30. Control supply is 24 V DC (20.4 to 28.8 V). Enclosure is IP65."},{"question":"What fieldbus protocols does it support?","answer":"It supports both PROFINET and PROFIBUS DP natively, with 2 bytes of input and 2 bytes of output process data."},{"question":"What are the physical dimensions and mounting?","answer":"The enclosure is 230 mm high, 110 mm wide, and 160 mm deep. It uses screw fixing and can be mounted vertically or horizontally. The main power connection is via an ISO 23570 socket."},{"question":"What is the ambient temperature range?","answer":"Operating range is -25 to +55 °C. Storage and transport range is -40 to +70 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1304-5LS70-3AA0","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/3RK1304-5LS70-3AA0 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}}