{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1303-6BS71-1AA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1303-6BS71-1AA3","canonicalUrl":"https://aoctrl.com/siemens/3RK1303-6BS71-1AA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1303-6BS71-1AA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens reversing starter, 3RK1303-6BS71-1AA3, solid-state switching, 3 A at AC-3 400 V, 24 V DC, IP65, PROFIBUS DP, 100 kA SCCR.","salesMarkdown":"The Siemens 3RK1303-6BS71-1AA3 is a reversing starter with solid-state switching contacts, rated 3 A at AC-3 duty on 400 V. It runs on a 24 V DC control supply (20.4 to 28.8 V permissible range). The enclosure carries IP65 protection, so it handles washdown environments in food-and-beverage or automotive lines without a separate cabinet. Communication runs over PROFIBUS DP, not PROFINET — that matters if your backbone is Siemens S7-300/400 with a DP master. Two parameterizable digital inputs on M12 sockets handle limit switches or start commands. No digital outputs onboard; the load switching is handled by the solid-state contactor inside. RoHS compliance date is marked as May 1, 2012, which covers the substance prohibitions under EU Directive 2011/65/EU. Dimensions are 250 mm high, 130 mm wide, 125 mm deep. The main energy infeed and load-side outgoing feeder use sockets per ISO 23570 — that is the standard hybrid connector interface for Siemens motor starters. Supply voltage transmission and communication transmission also use hybrid sockets/plugs, so the wiring harness is a single multi-conductor cable per drop. Short-circuit protection is via an upstream fuse (not a circuit breaker). The AC-3 rating of 3 A at 400 V covers motor starting duty — switching a 3-phase induction motor up to roughly 1.5 kW (2 HP) under normal starting conditions. The solid-state contacts handle the inrush without wear, so the auxiliary contact reliability is rated at less than 1 error per 100 million operating cycles. Full motor protection is built in, with brake control at 400 V AC available. Minimum operating frequency is 1 cycle per hour, so it is not intended for high-speed reversing applications like servo-style indexing.","metaTitle":"Siemens 3RK1303-6BS71-1AA3 Reversing Starter, 3 A AC-3, 24 V","metaDescription":"Siemens 3RK1303-6BS71-1AA3 reversing starter, 3 A at AC-3 400 V, 24 V DC, IP65, PROFIBUS DP, solid-state switching. 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":"3 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":"1 100 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":"0.3 ... 3 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=112880&mlfb=3RK1303-6BS71-1AA3","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1303-6BS71-1AA3/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RK1303-6BS71-1AA3 and how is it quoted?","answer":"It is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is the closest functional alternative to 3RK1303-6BS71-1AA3?","answer":"The 3RT5056-8AP38-0PR0 is a different form factor — a contactor assembly rather than an integrated reversing starter with PROFIBUS DP and IP65. The 3RK1303-6BS71-1AA3 is a self-contained unit with solid-state switching, bus communication, and hybrid connectors; the 3RT series requires separate overload relay, enclosure, and wiring. They are not drop-in replacements."},{"question":"What compliance documentation does this part have?","answer":"RoHS compliance is dated May 1, 2012. The part carries IP65 protection class and is designed per ISO 23570 for the connector interfaces."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1303-6BS71-1AA3","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/3RK1303-6BS71-1AA3 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}}