{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1325-6LS41-3AA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1325-6LS41-3AA3","canonicalUrl":"https://aoctrl.com/siemens/3RK1325-6LS41-3AA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1325-6LS41-3AA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS reversing starter, 3RK1325-6LS41-3AA3, 5.5 kW at 400 V, IP65, AS-Interface, trip classes 5/10/15/20.","salesMarkdown":"The Siemens 3RK1325-6LS41-3AA3 is a SIRIUS reversing starter — a motor starter that can change rotation direction without an external contactor interlock. It's designed for reversing loads like conveyors, hoists, and pumps where forward/reverse cycling is part of normal operation. Rated at 5.5 kW at 400 V (7.5 hp at 460/480 V, 10 hp at 575/600 V), it handles common three-phase motor sizes in a compact IP65 enclosure — meaning it's sealed against dust and low-pressure water jets, so it can sit directly on the machine frame or near the motor, not just inside a panel. Trip class is selectable between CLASS 5, 10, 15, and 20. That's the maximum time in seconds the overload relay allows before tripping at 7.2× full-load current. Class 10 is the default for standard motor starting; drop to Class 5 for fast-cycling or high-inertia loads that need tighter thermal protection, or go to Class 15/20 for hard-starting applications like crushers or compressors. Supply voltage is 24 V DC nominal (20.4 to 28.8 V operating range), with a maximum permissible of 31.6 V. That's the control voltage for the internal logic and AS-Interface communication — not the motor power circuit. The motor power comes through the HAN Q4/2 connector on the main circuit side. Four digital inputs are available for local control signals — enough for start, stop, forward, and reverse commands without an external I/O block. Addressing is via an M12 plug, which is standard for fieldbus nodes in distributed installations. On-delay is 85 ms, off-delay 65 ms — fast enough for most sequencing but not for safety-rated stop categories; if you need SIL/PL-rated off-delays, the internal timer isn't the path. Shock resistance is 12g at 11 ms, vibration resistance 7 mm / 2g, so it holds up on machine-mounted applications near rotating equipment. ## Where and how to mount it Mounting position is flexible — vertical, horizontal, or flat — but horizontal is recommended for best heat dissipation from the overload relay. Fastening is by screw fixing; no DIN-rail clip on this unit, so plan for four screws into a backplate or machine frame. IP65 means the enclosure is dust-tight and protected against water jets from any direction — suitable for washdown areas in food processing, outdoor installations under a canopy, or dusty environments like sawmills. The degree of pollution rating is 3, so it's designed for conductive or dry non-conductive pollution typical of industrial floors. That covers most plant-floor environments without derating; if your ambient regularly exceeds 55 °C, you'll need to consider a different enclosure or forced cooling.","metaTitle":"Siemens 3RK1325-6LS41-3AA3 SIRIUS Reversing Starter, 5.5 kW","metaDescription":"Siemens 3RK1325-6LS41-3AA3 SIRIUS reversing starter, 5.5 kW at 400 V, IP65, AS-Interface, trip classes 5/10/15/20. Active production, sourced to order.","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":"85 ms","During Storage":"-40 ... +70 °C","OFF-delay time":"65 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","at 575/600 V rated value":"10 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":"No","brake control with 230 V AC":"Yes","brake control with 400 V AC":"Yes","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":"electromechanical","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":"4.1184 W","in switching state OFF with bypass circuit":"2.0736 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 (industrial sector)","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":"600 V","Mechanical Service Life (Switching Cycles) Of The Main Contacts Typical":"10 000 000","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":"https://cdn.aoctrl.com/a410c58909ce6e09f879a4195f53504f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=334835&mlfb=3RK1325-6LS41-3AA3","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1325-6LS41-3AA3/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions of this reversing starter?","answer":"Depth is 159 mm, width 294 mm, height 215 mm. That's the enclosure footprint; plan for screw-fixing clearance around those dimensions."},{"question":"Can this starter be used for reversing applications?","answer":"Yes, it's specifically designed as a reversing starter — it can switch motor direction without an external interlock. It supports reverse starting directly."},{"question":"What trip classes are available on this unit?","answer":"Trip class is selectable between CLASS 5, 10, 15, and 20. This allows matching the overload protection to the motor start characteristics."},{"question":"What communication protocol does it use?","answer":"It supports AS-Interface protocol for fieldbus communication. It does not have PROFINET or PROFIBUS DP onboard."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1325-6LS41-3AA3","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/3RK1325-6LS41-3AA3 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}}