{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK4320-3LQ54-1BA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK4320-3LQ54-1BA2","canonicalUrl":"https://aoctrl.com/siemens/3RK4320-3LQ54-1BA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RK4320-3LQ54-1BA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RK4320-3LQ54-1BA2 reversing motor starter, AS-Interface, 6.3 A at AC-3 400 V, Class 10, IP54, 205 x 245 x 215 mm.","salesMarkdown":"## 6.3 A reversing starter with AS-Interface bus The Siemens 3RK4320-3LQ54-1BA2 is a SIRIUS reversing motor starter with integrated AS-Interface communication, rated 6.3 A at AC-3 400 V — this is the motor-switching current for standard squirrel-cage induction motors, not the thermal full-load current. ## Control supply and AS-Interface integration The control supply is 20.4 to 26.4 V DC, and the unit supports AS-Interface protocol — no PROFIBUS or PROFINET on this variant. Two digital inputs are onboard for local start/stop or feedback. ## Mounting and environmental fit The enclosure measures 205 mm deep by 245 mm wide by 215 mm high, with IP54 protection — suitable for panel-mount in dry or damp industrial environments, not washdown. The unit includes a motor brake output (24 V DC brake control is not present; brake control options for 180 V DC, 400 V AC, and 500 V DC are all listed as 'no').","metaTitle":"Siemens 3RK4320-3LQ54-1BA2 Motor Starter, 6.3 A AC-3, 400 V","metaDescription":"Siemens 3RK4320-3LQ54-1BA2 SIRIUS reversing motor starter, 6.3 A at AC-3 400 V, Class 10, AS-Interface, IP54. Active production, quoted 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","title":"3RK4320-3LQ54-1BA2","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 Reversing starter Brake 230 V AC (internal) Performance class 6.30 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":"reversing 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":"No","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0526450f0f3f20b8e1b16a56fe6f6c6a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=305255&mlfb=3RK4320-3LQ54-1BA2"},"ai":{"faq":[{"question":"How can I order 3RK4320-3LQ54-1BA2 and get a quote?","answer":"Submit an RFQ for current pricing and availability — no stock-holding claim is made here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK4320-3LQ54-1BA2","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/3RK4320-3LQ54-1BA2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}