{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK4320-3LQ54-0BA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK4320-3LQ54-0BA3","canonicalUrl":"https://aoctrl.com/siemens/3RK4320-3LQ54-0BA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK4320-3LQ54-0BA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS MCU motor starter for AS-Interface, 3RK4320-3LQ54-0BA3, direct starter, 6.3 A at 400 V AC-3, CLASS 10, IP54, DC control supply 20.4-26.4 V.","salesMarkdown":"It combines a contactor, overload relay, and short-circuit protection into a single unit, communicating over the AS-Interface bus for wiring reduction and diagnostics. Rated 6.3 A at 400 V in AC-3 duty, it switches standard three-phase squirrel-cage motors up to that current. The control supply accepts 20.4 to 26.4 V DC, and the main circuit operates on 340 to 440 V AC at 50 or 60 Hz. With IP54 protection, it's suited for panel-mount or field-mount in environments where dust and splash are present but not high-pressure washdown. The unit measures 245 mm wide, 215 mm high, and 205 mm deep. It includes two digital inputs for local control signals and a motor brake output (400 V AC), which simplifies wiring for applications requiring a holding brake. The bimetal overload relay provides thermal motor protection.","metaTitle":"Siemens 3RK4320-3LQ54-0BA3 SIRIUS MCU Motor Starter","metaDescription":"Siemens 3RK4320-3LQ54-0BA3 SIRIUS motor starter MCU for AS-Interface, 6.3 A at 400 V AC-3, CLASS 10, IP54, DC control. Active lifecycle, sourced to order.","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":"direct starter","Number Of Digital Inputs":"2","Short Circuit Protection":"Yes","at AC at 400 V rated value":"6.3 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":"Yes","brake control with 500 V DC":"No","Type Of The Motor Protection":"bimetal","at AC-3 at 400 V rated value":"6.3 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":"2.2 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":"4.5 ... 6.3 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=106273&mlfb=3RK4320-3LQ54-0BA3","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK4320-3LQ54-0BA3/alternatives.json"},"ai":{"faq":[{"question":"Does 3RK4320-3LQ54-0BA3 support AS-Interface?","answer":"Yes, the AS-Interface protocol is supported on this motor starter MCU, enabling bus-based control and diagnostics."},{"question":"Where can I buy 3RK4320-3LQ54-0BA3?","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/3RK4320-3LQ54-0BA3","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/3RK4320-3LQ54-0BA3 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}}