{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK4320-3HQ54-1BA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK4320-3HQ54-1BA2","canonicalUrl":"https://aoctrl.com/siemens/3RK4320-3HQ54-1BA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RK4320-3HQ54-1BA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RK4320-3HQ54-1BA2, reversing motor starter, 3.2 A AC-3 at 400 V, Class 10, IP54, AS-Interface bus communication, 2 digital inputs, DC control supply.","salesMarkdown":"## Motor starter for AS-Interface reversing duty The Siemens SIRIUS 3RK4320-3HQ54-1BA2 is a reversing motor starter designed for AS-Interface bus communication, rated 3.2 A at AC-3 duty on a 400 V supply. Operating voltage is 340 to 440 V AC, 50/60 Hz, with a DC control supply of 20.4 to 26.4 V. The unit includes a motor brake output and two digital inputs, making it suitable for reversing applications where a single contactor-based solution must handle forward/reverse direction changes under AS-Interface control. The IP54 enclosure protects against dust ingress and splashing water, so the starter can be mounted inside a control cabinet or in a protected machine enclosure where washdown is not direct. ## Bus integration and I/O AS-Interface is the only fieldbus protocol supported — PROFINET and PROFIBUS DP are not available on this variant. The two digital inputs can be mapped to AS-i slave data for local pushbuttons or limit switches, reducing wiring back to a central PLC. Dimensions are 245 mm wide by 215 mm high by 205 mm deep — factor this into DIN-rail spacing and enclosure depth.","metaTitle":"Siemens 3RK4320-3HQ54-1BA2 SIRIUS reversing starter","metaDescription":"Siemens SIRIUS 3RK4320-3HQ54-1BA2 reversing motor starter, 3.2 A AC-3 at 400 V, Class 10, IP54, AS-Interface bus communication. Current lifecycle stage.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"205 mm","Width":"245 mm","Height":"215 mm","Trip Class":"CLASS 10","Type Of Voltage":"DC","lifecycle_stage":"current","Bus Communication":"Yes","Mounting Position":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","PROFINET protocol":"No","Product Brand Name":"SIRIUS","Type Of Assignment":"1","Product Designation":"motor starter MCU for AS-Interface","protection class IP":"IP54","PROFIBUS DP protocol":"No","Design Of The Product":"reversing starter","Number Of Digital Inputs":"2","Short Circuit Protection":"Yes","at AC at 400 V rated value":"3.2 A","brake control with 24 V DC":"No","Operating Frequency Minimum":"80 1/h","brake control with 180 V DC":"No","brake control with 400 V AC":"No","brake control with 500 V DC":"No","Type Of The Motor Protection":"bimetal","at AC-3 at 400 V rated value":"3.2 A","Operating Voltage Rated Value":"340 ... 440 V","Substance Prohibitance (Date)":"05/01/2012","Design Of The Switching Contact":"electromechanical","Operating Frequency 1 Rated Value":"50 Hz","Operating Frequency 2 Rated Value":"60 Hz","Design Of Short-Circuit Protection":"circuit-breakers","Ambient Temperature During Operation":"-25 ... +50 °C","Product Component Motor Brake Output":"Yes","Type Of Voltage Of The Supply Voltage":"DC","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 ... 26.4 V","with low demand rate according to SN 31920":"50 %","protocol is supported AS-Interface protocol":"Yes","with high demand rate according to SN 31920":"75 %","operating power at AC-3 at 400 V rated value":"1.1 kW","Product Extension Braking Module For Brake Control":"No","Relative Negative Tolerance Of The Operating Frequency":"-10 %","Relative Positive Tolerance Of The Operating Frequency":"10 %","Type Of Electrical Connection For Main Current Circuit":"screw-type terminals","breaking capacity maximum short-circuit current (Icu) at 400 V rated value":"50 000 A","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"2.2 ... 3.2 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=479119&mlfb=3RK4320-3HQ54-1BA2","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK4320-3HQ54-1BA2/alternatives.json"},"ai":{"faq":[{"question":"Does 3RK4320-3HQ54-1BA2 support PROFINET?","answer":"No, this motor starter supports AS-Interface protocol only. PROFINET and PROFIBUS DP are not available on this variant."},{"question":"Where can I buy 3RK4320-3HQ54-1BA2?","answer":"This part is sourced to order. Availability and pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK4320-3HQ54-1BA2","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/3RK4320-3HQ54-1BA2 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}}