{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK1323-5BS44-3AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK1323-5BS44-3AA0","canonicalUrl":"https://aoctrl.com/siemens/3RK1323-5BS44-3AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RK1323-5BS44-3AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens reversing starter 3RK1323-5BS44-3AA0, solid-state motor protection, 3 A AC-3 at 400 V, IP65, 100 kA SCCR, 4 digital inputs.","salesMarkdown":"The Siemens 3RK1323-5BS44-3AA0 is a reversing starter — a compact motor control unit that combines a contactor pair with solid-state motor protection in one IP65 enclosure. It's built for reversing motor loads like conveyors, hoists, or gate drives where direction change is part of the cycle. Rated 3 A at AC-3 duty at 400 V, so it switches standard squirrel-cage induction motors up to that current — think 1.5 kW or so on a 400 V three-phase line. Operating voltage range is 400 to 500 V, supply voltage is 24 V DC nominal (20.4 to 28.8 V DC permissible, max 31.6 V). The 24 V DC control side is standard for industrial control panels — keeps the coil circuit isolated from the power side. ## IP65 and field-mount design This starter is meant for machine-mount or field-mount installation — not inside a cabinet. It's common on packaging lines, material handling equipment, or anywhere you'd rather put the motor control at the point of use than run long power cables back to a panel. Dimensions are 250 mm high, 130 mm wide, 91 mm deep. That's a compact footprint for a reversing starter with integrated protection. The enclosure has sockets for main energy infeed and load-side outgoing feeder per ISO 23570, plus M12 sockets for digital input signals. Supply voltage and communication transmission use AS-i shaped cables with cutting/clamping method — no separate wiring glands needed for those connections. ## Motor protection and inputs Motor protection is solid-state — no bimetallic overload relay to reset. It provides electronic overload protection with adjustable parameters via the digital inputs. There are 4 digital inputs total, 2 of them configurable for digital input signals via M12 sockets; 0 digital outputs on this variant. The digital inputs are parameterizable, so you can set the function (e.g., start/stop, reversing command, fault reset) through the AS-i network. Switching contact design is mechanical (the contactor pair), not solid-state. Minimum operating frequency is 1 cycle per hour — that's the rated mechanical endurance limit, not a thermal limit. For higher cycling rates, you'd need to check the application against the manufacturer's data.","metaTitle":"Siemens 3RK1323-5BS44-3AA0 reversing starter, 3 A AC-3, IP65","metaDescription":"Siemens 3RK1323-5BS44-3AA0 reversing starter with solid-state motor protection, 3 A at AC-3 400 V, IP65, 100 kA SCCR. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Remote I/O & Fieldbus Modules"],"specifications":{"Depth":"91 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":"31.6 V","Minimum Permissible":"26.5 V","protection class IP":"IP65","PROFIBUS DP protocol":"No","at 400 V rated value":"100 kA","Design Of The Product":"reversing starter","For Device Addressing":"front addressing socket","For Main Energy Infeed":"socket according to ISO23570","supply voltage 1 at DC":"30 ... 30 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 180 V DC":"No","brake control with 400 V AC":"No","For Supply Voltage Line-Side":"via AS-I shaped cables with cutting/clamping method","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":"via AS-I shaped cables with cutting/clamping method","Of The Communication Interface":"via AS-I shaped cables with cutting/clamping method","Design Of The Switching Contact":"mechanical","Digital Outputs Parameterizable":"No","For Supply Voltage Transmission":"via AS-I shaped cables with cutting/clamping method","Design Of Short-Circuit Protection":"fuse","Ambient Temperature During Operation":"-20 ... +40 °C","Product Component Motor Brake Output":"No","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","protocol is supported AS-Interface protocol":"Yes","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":"$693.42","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=204705&mlfb=3RK1323-5BS44-3AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK1323-5BS44-3AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the AC-3 motor rating at 400 V?","answer":"It's rated 3 A at AC-3 duty at 400 V. That covers standard induction motors up to roughly 1.5 kW on a 400 V three-phase supply."},{"question":"What is the short-circuit current rating (SCCR)?","answer":"The rated short-circuit current is 100 kA at 400 V. That's the maximum fault current the starter can safely interrupt without upstream protection needing to coordinate."},{"question":"What enclosure protection does it have?","answer":"IP65 — dust-tight and protected against water jets. Designed for machine-mount or field-mount installation, not inside a cabinet."},{"question":"How many digital inputs does it have, and are they configurable?","answer":"It has 4 digital inputs total, 2 of which are via M12 sockets. All digital inputs are parameterizable through the AS-i network."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK1323-5BS44-3AA0","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/3RK1323-5BS44-3AA0 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}}