{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1303-5BS44-3AA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1303-5BS44-3AA3","canonicalUrl":"https://aoctrl.com/siemens/3RK1303-5BS44-3AA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1303-5BS44-3AA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens reversing starter, 3RK1303-5BS44-3AA3, IP65, 24 V DC, 3 A AC-3 at 400 V, PROFIBUS DP, solid-state motor protection, brake control.","salesMarkdown":"The Siemens 3RK1303-5BS44-3AA3 is a reversing starter built for motor control in washdown or dusty environments — the IP65 enclosure keeps moisture and grit out of the contactor and electronics. It runs on 24 V DC control voltage, with a permissible range of 20.4 to 28.8 V DC, so it holds steady on a 24 V bus even with some drop on long cable runs. The solid-state motor protection handles overload sensing internally, no separate relay needed. And it includes brake control at 400 V AC, so it's ready for a motor with a holding brake. On the communication side, it speaks PROFIBUS DP out of the box — no option card needed. No PROFINET onboard, so if your line runs PROFINET, you'll need a gateway or a different variant. The hybrid plug-socket arrangement handles both the supply voltage and the bus connection through a single multi-pin connector, which keeps the wiring clean and saves a couple of cable entries on the gland plate. Panel fit: 250 mm tall, 130 mm wide, 107 mm deep. The IP65 rating means it's meant to be mounted outside the main control cabinet, close to the motor, with the M12 sockets for the four digital inputs. The hybrid plug for the supply voltage and the hybrid socket for communication are both ISO 23570-style, so the mating connectors are standardised. The four digital inputs are parameterisable — you can assign them to start, stop, reverse, or other functions via the bus. Two of those inputs are on M12 sockets. No digital outputs on board, so any status feedback to the PLC goes over PROFIBUS DP.","metaTitle":"Siemens 3RK1303-5BS44-3AA3 Reversing Starter, IP65, 24 V DC,","metaDescription":"Siemens 3RK1303-5BS44-3AA3 reversing starter, IP65, 24 V DC, 3 A AC-3 at 400 V. PROFIBUS DP, solid-state motor protection, brake control. Active production. Quoted to order.","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":"4","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":"solid-state","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":"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":"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=174156&mlfb=3RK1303-5BS44-3AA3","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1303-5BS44-3AA3/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RK1303-5BS44-3AA3?","answer":"Pricing and availability are confirmed at quote time. Submit an RFQ through this page; the part is sourced and quoted to order through independent distribution channels."},{"question":"What is 3RK1303-5BS44-3AA3's listed depth and width?","answer":"The depth is 107 mm and the width is 130 mm. Height is 250 mm."},{"question":"What compliance documentation does the brand provide for 3RK1303-5BS44-3AA3?","answer":"The part carries a substance prohibition date of 05/01/2012, indicating RoHS compliance. No UL or IEC listing numbers appear in the spec record; check the manufacturer's declaration for full CE/UKCA status."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1303-5BS44-3AA3","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/3RK1303-5BS44-3AA3 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}}