{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1325-6LS71-3AA5","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1325-6LS71-3AA5","canonicalUrl":"https://aoctrl.com/siemens/3RK1325-6LS71-3AA5","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1325-6LS71-3AA5","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS reversing motor starter, 3RK1325-6LS71-3AA5, 5.5 kW at 400 V, IP65, AS-Interface, trip class 5/10/15/20, 4 digital inputs.","salesMarkdown":"The Siemens 3RK1325-6LS71-3AA5 is a SIRIUS reversing motor starter — a self-contained unit that combines a reversing contactor pair, overload protection, and an AS-Interface communication interface in one IP65 enclosure. It is designed for direct-on-line reversing of three-phase motors up to 5.5 kW at 400 V (7.5 hp at 460/480 V), with selectable trip classes 5, 10, 15, or 20 to match the motor's thermal time constant. The 24 V DC control supply (20.4–28.8 V range) powers the onboard electronics and the AS-Interface link, which handles both I/O data and parameterization through a single M12 connection. Mounting is via screw fixing; the unit can be installed vertically, horizontally, or flat, though horizontal is recommended for optimal heat dissipation. The 5.5 kW rating at 400 V AC-3 (motor starting) defines the maximum three-phase induction motor this starter can handle under normal duty. The selectable trip class (5, 10, 15, or 20) lets you match the overload relay's thermal curve to the motor — Class 10 for standard squirrel-cage motors, Class 20 for high-inertia loads like fans or centrifuges. The 4 digital inputs (24 V DC, M12-connected) can be used for local pushbuttons or sensor feedback, reducing the need for a separate I/O block. The reversing function is built in — no external interlocking required. ON-delay of 25 ms and OFF-delay of 35 ms are fixed, ensuring a dead time between forward and reverse that prevents phase-to-phase shorting. The unit also supports reverse starting directly, with no additional contactor. ## Integration into a panel or line Dimensions are 294 mm wide × 215 mm high × 159 mm deep. The screw-fixing method and multiple mounting positions (vertical, horizontal, flat) give flexibility for enclosure layout, but horizontal mounting is recommended for thermal performance. The main circuit connects via a HAN Q4/2 plug (per ISO 23570); the AS-Interface and digital inputs use M12 connectors. The IP65 enclosure allows direct mounting on the machine frame, eliminating a separate control cabinet.","metaTitle":"Siemens 3RK1325-6LS71-3AA5 SIRIUS Reversing Starter, 5.5 kW,","metaDescription":"Siemens SIRIUS 3RK1325-6LS71-3AA5 reversing motor starter, 5.5 kW at 400 V, IP65, AS-Interface, trip class 5/10/15/20. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Depth":"159 mm","Width":"294 mm","at DC":"20.4 ... 28.8 V","Height":"215 mm","Trip Class":"CLASS 5, 10, 15, 20","Recommended":"horizontal","Direct Start":"No","ON-delay time":"25 ms","During Storage":"-40 ... +70 °C","OFF-delay time":"35 ms","lifecycle_stage":"current","During Operation":"-25 ... +55 °C","During Transport":"-40 ... +70 °C","Fastening Method":"screw fixing","Reverse Starting":"Yes","Shock Resistance":"12g / 11 ms","Mounting Position":"vertical, horizontal, flat","On-Site Operation":"Yes","PROFINET protocol":"No","at DC rated value":"20.4 ... 28.8 V","Product Brand Name":"SIRIUS","Type Of Assignment":"1","Degree Of Pollution":"3","Maximum Permissible":"31.6 V","Minimum Permissible":"26.5 V","Product Designation":"Motor starters","protection class IP":"IP65","PROFIBUS DP protocol":"No","Vibration Resistance":"7 mm / 2g","at 400 V rated value":"5.5 kW","at 500 V rated value":"5 500 W","AS-Interface protocol":"Yes","Design Of The Product":"reversing starter","For Device Addressing":"M12 plug","supply voltage 1 at DC":"24 V","For Main Current Circuit":"plug according to ISO 23570, HAN Q4/2","Number Of Digital Inputs":"4","at 220/230 V rated value":"3 hp","at 460/480 V rated value":"7.5 hp","For Digital Input Signals":"4","Number Of Digital Outputs":"1","For Digital Output Signals":"1","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":"Yes","brake control with 230 V AC":"No","brake control with 400 V AC":"No","brake control with 500 V DC":"No","1 For Digital Output Signals":"M12 socket","For Supply Voltage Line-Side":"M12 plug","In Standby Mode Of Operation":"0.1 A","Type Of The Motor Protection":"full motor protection","at AC-3 at 400 V rated value":"12 A","Operating Voltage Rated Value":"200 ... 440 V","Substance Prohibitance (Date)":"07/01/2006","Digital Inputs Parameterizable":"Yes","Insulation Voltage Rated Value":"500 V","Design Of The Switching Contact":"solid-state / thyristor / 2 phases","Digital Outputs Parameterizable":"Yes","For Auxiliary And Control Circuit":"connector","Between Main And Auxiliary Circuit":"400 V","Design Of Short-Circuit Protection":"circuit-breakers","Product Function Bus Communication":"Yes","Relative Humidity During Operation":"10 ... 95 %","supply voltage 1 at DC rated value":"30 V","Product Component Motor Brake Output":"Yes","Surge Voltage Resistance Rated Value":"6 000 V","Between Control And Auxiliary Circuit":"24 V","EMC immunity according to IEC 60947-1":"corresponds to degree of severity 3, ambience A (industrial sector)","Type Of Voltage Of The Supply Voltage":"DC","due to burst according to IEC 61000-4-4":"2 kV network connection / 1 kV control connection","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","in switching state ON with bypass circuit":"8.2656 W","in switching state OFF with bypass circuit":"1.9872 W","protocol is supported AS-Interface protocol":"Yes","Control Circuit Interface To Parallel Wiring":"No","At The Manufacturer-Specific Device Interface":"optical interface","Type Of Voltage Of The Control Supply Voltage":"DC","EMC emitted interference according to IEC 60947-1":"CISPR11, ambience A (group 2)","Product Extension Braking Module For Brake Control":"No","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","product function control circuit interface with IO link":"No","Type Of Electrical Connection Of The Communication Interface":"M12 plug","full-load current (FLA) for 3-phase AC motor at 480 V rated value":"11 A","operating voltage at AC at 60 Hz according to CSA and UL rated value":"480 V","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"1.5 ... 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=73543&mlfb=3RK1325-6LS71-3AA5","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1325-6LS71-3AA5/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RK1325-6LS71-3AA5 and get a price?","answer":"This part is sourced and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time through our independent distribution network."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1325-6LS71-3AA5","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/3RK1325-6LS71-3AA5 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}}