{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1323-6DS74-3AA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1323-6DS74-3AA3","canonicalUrl":"https://aoctrl.com/siemens/3RK1323-6DS74-3AA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1323-6DS74-3AA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens reversing starter, solid-state switching, 12 A at AC-3 400 V, 100 kA SCCR, IP65, 4 DI, AS-i communication.","salesMarkdown":"The Siemens 3RK1323-6DS74-3AA3 is a reversing starter with solid-state switching contacts, designed for motor control in distributed automation architectures. It is part of the AS-Interface (AS-i) product family, communicating and receiving power via the AS-i shaped cable — no separate control wiring for the coil circuit. The solid-state design means no mechanical contact wear during reversing operations, making it suitable for high-cycle applications where electromechanical contactors would require frequent replacement. Rated at 12 A at AC-3 duty class at 400 V, it handles reversing motor loads up to roughly 5.5 kW (typical 4-pole induction motor at 400 V). The unit measures 250 mm high by 130 mm wide by 107 mm deep. The load-side outgoing feeder and main energy infeed use sockets according to ISO 23570, which means pre-terminated cables with the matching connector plug in without opening the housing. Supply voltage, communication, and digital input signals all connect via the AS-i shaped cable using cutting/clamping method, so the installer simply lays the cable into the slot and tightens — no stripping, no screw terminals. Four digital inputs are onboard, two of which terminate at M12 sockets for external sensors. The inputs are parameterizable, allowing the integrator to configure the input logic (PNP/NPN, debounce, etc.) through the AS-i master rather than hardware jumpers. There are no digital outputs on this variant, so any solenoid or indicator loads require an additional output module on the AS-i segment. ## Motor protection and brake control The unit provides full motor protection, meaning it includes integrated overload protection that tracks the motor's thermal state. This is not a simple bimetallic relay — it is electronic, using the solid-state switching to measure current and compute I²t heating. It also supports brake control with 400 V AC, so a mechanical brake on the motor shaft can be controlled directly from the starter without a separate brake rectifier or contactor. Operating frequency is rated at a minimum of 1 cycle per hour, which is a minimum switching frequency — not a maximum. This rating means the device is designed for applications where the motor reverses infrequently, such as conveyor diverter gates or valve actuators. For higher cycle rates (hundreds per hour), a different starter variant or a servo drive would be more appropriate.","metaTitle":"Siemens 3RK1323-6DS74-3AA3 Reversing Starter, 12 A AC-3, IP6","metaDescription":"Siemens reversing starter, solid-state, 12 A at AC-3 400 V, 100 kA SCCR, IP65, current lifecycle stage. Sourced to order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Depth":"107 mm","Width":"130 mm","at DC":"24 ... 24 V","Height":"250 mm","Type Of Voltage":"DC","lifecycle_stage":"current","Bus Communication":"Yes","PROFINET protocol":"No","at DC rated value":"20.4 ... 28.8 V","Type Of Assignment":"1","Maximum Permissible":"31.6 V","Minimum Permissible":"26.5 V","protection class IP":"IP65","PROFIBUS DP protocol":"No","at 400 V rated value":"100 kA","Design Of The Product":"reversing starter","For Device Addressing":"front addressing socket","For Main Energy Infeed":"socket according to ISO23570","supply voltage 1 at DC":"30 ... 30 V","Number Of Digital Inputs":"4","Short Circuit Protection":"Yes","For Digital Input Signals":"2","For Digital Output Signals":"0","1 For Digital Input Signals":"M12 socket","2 For Digital Input Signals":"M12 socket","Operating Frequency Minimum":"1 1/h","brake control with 180 V DC":"No","brake control with 400 V AC":"Yes","For Supply Voltage Line-Side":"via AS-I shaped cables with cutting/clamping method","Type Of The Motor Protection":"full motor protection","at AC-3 at 400 V rated value":"12 A","For Load-Side Outgoing Feeder":"socket according to ISO23570","Operating Voltage Rated Value":"400 ... 500 V","Substance Prohibitance (Date)":"05/01/2012","Digital Inputs Parameterizable":"Yes","For Communication Transmission":"via AS-I shaped cables with cutting/clamping method","Of The Communication Interface":"via AS-I shaped cables with cutting/clamping method","Design Of The Switching Contact":"solid-state","Digital Outputs Parameterizable":"No","For Supply Voltage Transmission":"via AS-I shaped cables with cutting/clamping method","Design Of Short-Circuit Protection":"fuse","Ambient Temperature During Operation":"-20 ... +40 °C","Product Component Motor Brake Output":"Yes","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","protocol is supported AS-Interface protocol":"Yes","operating power at AC-3 at 400 V rated value":"5 500 W","At The Manufacturer-Specific Device Interface":"M12 socket","Type Of Voltage Of The Control Supply Voltage":"DC","Type Of Electrical Connection For Main Current Circuit":"tab terminals","Type Of Voltage Of The Supply Voltage For Brake Control Required":"AC","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"2.4 ... 12 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=344215&mlfb=3RK1323-6DS74-3AA3","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1323-6DS74-3AA3/alternatives.json"},"ai":{"faq":[{"question":"What is the SCCR and why does it matter?","answer":"The short-circuit current rating is 100 kA at 400 V. This means the starter can withstand a fault current up to 100,000 A without catastrophic failure, allowing it to coordinate with upstream protective devices. In a panel with high available fault current, this rating avoids the need for current-limiting fuses upstream."},{"question":"Does this unit replace a 3RT1055-6LA06 contactor-based reversing starter?","answer":"No — the 3RK1323-6DS74-3AA3 is a solid-state reversing starter with AS-i communication and IP65 enclosure. The 3RT1055-6LA06 is a conventional electromechanical contactor assembly. They are functionally different products: this one integrates overload protection, brake control, and digital I/O in a sealed housing, while the 3RT1055 requires a separate overload relay and cabinet. You cannot drop one into a panel wired for the other without rewiring the control circuit and communication bus."},{"question":"What compliance documentation is available?","answer":"The unit has a substance prohibitance date of 05/01/2012, confirming RoHS compliance (EU Directive 2011/65/EU). As a Siemens industrial control product, it also carries CE marking and is designed to meet relevant IEC/EN standards for motor starters and AS-i devices."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1323-6DS74-3AA3","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/3RK1323-6DS74-3AA3 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}}