{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1303-2AS51-1AA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1303-2AS51-1AA3","canonicalUrl":"https://aoctrl.com/siemens/3RK1303-2AS51-1AA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1303-2AS51-1AA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens reversing starter, 3RK1303-2AS51-1AA3, IP65, 4 A AC-3 at 400 V, 100 kA SCCR, PROFIBUS DP, 24 V DC coil.","salesMarkdown":"The Siemens 3RK1303-2AS51-1AA3 is a reversing starter designed for motor control in industrial automation. The IP65 enclosure means the unit withstands washdown environments — suitable for food-and-bev lines or outdoor installation without a separate cabinet. Rated supply voltage is 24 V DC, with a permissible range of 20.4 to 28.8 V DC, so it holds in during dips on a 24 V control bus. Communication is via PROFIBUS DP, with two M12 digital inputs for local sensors or pushbuttons. The motor protection uses a thermistor input, so it can directly monitor winding temperature on the motor side. ## Integration notes Dimensions are 130 mm wide, 250 mm high, and 107 mm deep — it fits a standard enclosure footprint but check the gland plate clearance for the hybrid plug and M12 connectors. The line-side infeed uses a hybrid plug; the load-side outgoing feeder uses a socket per ISO 23570. Brake control at 400 V AC is integrated, so no external contactor is needed for motor brake circuits.","metaTitle":"Siemens 3RK1303-2AS51-1AA3 reversing starter, IP65, 4 A AC-3","metaDescription":"Siemens 3RK1303-2AS51-1AA3 reversing starter, IP65, 4 A AC-3 at 400 V, 100 kA SCCR, PROFIBUS DP, current lifecycle stage. Sourced to order against an RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Depth":"107 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":"thermistor","at AC-3 at 400 V rated value":"4 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":"mechanical","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":"4 000 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 ... 9 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=240654&mlfb=3RK1303-2AS51-1AA3","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1303-2AS51-1AA3/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1303-2AS51-1AA3","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/3RK1303-2AS51-1AA3 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}}