{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1303-6DS71-1AA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1303-6DS71-1AA3","canonicalUrl":"https://aoctrl.com/siemens/3RK1303-6DS71-1AA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1303-6DS71-1AA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3RK1303-6DS71-1AA3 reversing starter, solid-state contacts, 12 A AC-3 at 400 V, IP65, PROFIBUS DP, 24 V DC control.","salesMarkdown":"The Siemens 3RK1303-6DS71-1AA3 is a reversing starter with solid-state switching contacts, rated 12 A at 400 V in AC-3 duty for motor loads. That AC-3 rating means it's built for starting and stopping squirrel-cage motors under load — the standard duty cycle for reversing starters on conveyors, pumps, or hoists where direction change is needed. It carries a full motor protection function, so it handles both overload and short-circuit protection in one package. The 24 V DC control supply has a tolerance window of 20.4 to 28.8 V, so it holds in during a sagging 24 V bus. Communication rides on PROFIBUS DP, not PROFINET — if your line is still on a DP backbone, this is a direct drop-in. ## Where it goes and how it connects IP65 rating means the housing is dust-tight and protected against low-pressure water jets — this lives on the machine, not in a clean control cabinet. It's built for washdown zones or outdoor conveyor sections where a standard contactor panel would need a separate enclosure. The main power infeed and load-side outgoing feeder both use sockets per ISO 23570, so cabling is a plug-and-play affair — no hardwiring into the starter body. The supply voltage line-side uses a hybrid plug that also carries the PROFIBUS DP communication, and the motor connection uses a hybrid socket. That hybrid connector bundles power and signal into one cable, which cuts wiring time on a multi-starter machine. It also includes brake control at 400 V AC, so if your motor has a holding brake, this starter handles the brake coil timing without a separate contactor. Mounts via the housing base; no DIN rail required. The AC-3 motor rating is 12 A and the interface is PROFIBUS DP. If your panel uses a different fieldbus, this starter will not drop in without a gateway.","metaTitle":"Siemens 3RK1303-6DS71-1AA3 reversing starter, 12 A AC-3, IP6","metaDescription":"Siemens 3RK1303-6DS71-1AA3 reversing starter with solid-state contacts, 12 A at 400 V AC-3, IP65, PROFIBUS DP, 24 V DC control, current lifecycle stage. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Depth":"125 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":"28.8 V","Minimum Permissible":"20.4 V","protection class IP":"IP65","PROFIBUS DP protocol":"Yes","at 400 V rated value":"100 kA","Design Of The Product":"reversing starter","Of Auxiliary Contacts":"< 1 error per 100 million operating cycles","For Main Energy Infeed":"socket according to ISO23570","supply voltage 1 at DC":"24 ... 24 V","Number Of Digital Inputs":"2","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 400 V AC":"Yes","For Supply Voltage Line-Side":"hybrid plug","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":"hybrid socket","Of The Communication Interface":"hybrid plug","Design Of The Switching Contact":"solid-state","Digital Outputs Parameterizable":"No","For Supply Voltage Transmission":"hybrid socket","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","design of the interface PROFINET protocol":"No","with low demand rate according to SN 31920":"50 %","protocol is supported AS-Interface protocol":"No","with high demand rate according to SN 31920":"75 %","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","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=181133&mlfb=3RK1303-6DS71-1AA3","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1303-6DS71-1AA3/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1303-6DS71-1AA3","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/3RK1303-6DS71-1AA3 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}}