{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK4320-3AQ54-0BA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK4320-3AQ54-0BA2","canonicalUrl":"https://aoctrl.com/siemens/3RK4320-3AQ54-0BA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RK4320-3AQ54-0BA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RK4320-3AQ54-0BA2 motor starter MCU for AS-Interface, direct starter, 0.63 A at 400 V AC-3, CLASS 10, IP54, 205 x 245 x 215 mm.","salesMarkdown":"## SIRIUS motor starter for AS-Interface networks The 3RK4320-3AQ54-0BA2: It integrates motor protection, switching, and communication into a single device, reducing wiring and panel space compared to a contactor-plus-overload-relay combination. The 3-pole main circuit handles the motor current, while the control supply runs on 20.4–26.4 V DC. ## Panel fit and mounting flexibility Dimensions are 205 mm deep, 245 mm wide, and 215 mm high — a compact footprint for a motor starter with integrated bus communication and brake output. The unit mounts on a vertical surface and allows ±180° rotation and ±22.5° forward/backward tilt, giving flexibility in tight enclosures. Rated IP54, so it handles dust and splashing water in industrial environments. ## AS-Interface integration and brake control The starter communicates via AS-Interface protocol (no PROFIBUS or PROFINET onboard), with 2 digital inputs for local sensors or pushbuttons. It includes a motor brake output, allowing direct control of a holding brake without an external relay. Short-circuit protection is designed for use with circuit-breakers upstream, and the switching contacts are electromechanical — not solid-state. The unit is rated for up to 80 operating cycles per hour, which covers most conveyor and pump cycling applications.","metaTitle":"Siemens 3RK4320-3AQ54-0BA2 Motor Starter, 0.63 A, CLASS 10","metaDescription":"Siemens SIRIUS 3RK4320-3AQ54-0BA2 motor starter, 0.63 A at 400 V AC-3, CLASS 10, AS-Interface, IP54. Active production, quoted to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"205 mm","Width":"245 mm","title":"3RK4320-3AQ54-0BA2","Height":"215 mm","Trip Class":"CLASS 10","description":"SIRIUS MCU motor starter Enclosure degree of protection IP54 metal Communication AS-Interface electromechanically switching Short-circuit protection with circuit breaker DOL starter Brake 230 V AC (internal) Performance class 0.63 A Motor circuit breaker with bi-metal thermal Rotary operating mechanism gray/black Connection power M screw connection Standard product","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":"direct starter","Number Of Digital Inputs":"2","Short Circuit Protection":"Yes","at AC at 400 V rated value":"0.63 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":"0.63 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":"0.2 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":"0.45 ... 0.63 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/f5d0384b04145b85a8d5beee8e23ae5b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=176404&mlfb=3RK4320-3AQ54-0BA2"},"ai":{"faq":[{"question":"What is the rated current of 3RK4320-3AQ54-0BA2 at 400 V?","answer":"It is rated 0.63 A at 400 V in both AC-3 (motor switching) and general AC duty. This is a low-current motor starter for small motors or fractional-horsepower loads."},{"question":"Does 3RK4320-3AQ54-0BA2 support PROFINET or PROFIBUS?","answer":"No, it supports AS-Interface only. PROFINET and PROFIBUS DP are both listed as not supported."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK4320-3AQ54-0BA2","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/3RK4320-3AQ54-0BA2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}