{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1325-6LS71-2AA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1325-6LS71-2AA3","canonicalUrl":"https://aoctrl.com/siemens/3RK1325-6LS71-2AA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1325-6LS71-2AA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RK1325-6LS71-2AA3, direct motor starter, 5.5 kW at 400 V, IP65, AS-Interface, trip class 5/10/15/20, 4 digital inputs.","salesMarkdown":"The Siemens SIRIUS 3RK1325-6LS71-2AA3 is a direct motor starter in a fully enclosed IP65 housing — built for standalone mounting right at the motor, not buried in a central panel. It handles 5.5 kW at 400 V (7.5 hp at 460/480 V) and communicates over AS-Interface, so it's a fit for distributed field-mount architectures where you want to pull the control cabinet out of the process area. ## Trip class and motor protection Trip class is selectable among CLASS 5, 10, 15, or 20 — that's the maximum time in seconds the overload relay allows before tripping under a locked-rotor condition. For a pump or fan with a normal start, CLASS 10 is typical; for a high-inertia load like a centrifuge, CLASS 20 gives the extra time to get up to speed without nuisance trips. ## Power supply and control voltage The control supply is 24 V DC nominal, with a tolerance range of 20.4 to 28.8 V. That's a standard 24 V industrial bus — no exotic voltage rail needed. The maximum permissible voltage is 31.6 V, so keep the bus regulated; a floating 24 V supply that drifts high under light load can push past that ceiling. ## Digital inputs and fieldbus Four digital inputs are onboard, addressed via M12 plug. The only fieldbus protocol supported is AS-Interface — no PROFIBUS or PROFINET on this variant. That means it slots into an AS-i network, not a standard PROFINET IO controller. If your line is built around PROFINET, this isn't the drop-in; you'd need the AS-i gateway to bridge. ## Physical dimensions and mounting The enclosure measures 294 mm wide, 215 mm high, and 159 mm deep — that's a substantial footprint, not a slim line module. It's screw-fix mounting, not DIN rail, so plan for four mounting points on the backplate. Mounting position is flexible: vertical, horizontal, or flat, though horizontal is recommended for optimal heat dissipation. IP65 means it's sealed against dust and low-pressure water jets — fine for washdown zones or outdoor installation under a canopy. ## Environmental limits Shock resistance is 12g for 11 ms, vibration resistance 7 mm / 2g — typical for industrial machinery but not extreme off-road or marine duty.","metaTitle":"Siemens 3RK1325-6LS71-2AA3 SIRIUS Motor Starter, 5.5 kW, IP6","metaDescription":"Siemens SIRIUS 3RK1325-6LS71-2AA3 direct motor starter, 5.5 kW at 400 V, IP65, AS-Interface, trip class 5/10/15/20. Current lifecycle. 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":"Yes","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":"No","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":"direct 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":"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":"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":"4.5216 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":"https://cdn.aoctrl.com/8cf08ffedf2d484aaf236dffd55ea571.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=385338&mlfb=3RK1325-6LS71-2AA3","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1325-6LS71-2AA3/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions of 3RK1325-6LS71-2AA3?","answer":"Width is 294 mm, height is 215 mm, depth is 159 mm. Mounting is screw-fix, not DIN rail, with flexible orientation (vertical, horizontal, or flat)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1325-6LS71-2AA3","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/3RK1325-6LS71-2AA3 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}}