{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK4320-3BQ54-1BA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK4320-3BQ54-1BA3","canonicalUrl":"https://aoctrl.com/siemens/3RK4320-3BQ54-1BA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK4320-3BQ54-1BA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RK4320-3BQ54-1BA3 reversing motor starter, AS-Interface communication, 0.8 A AC-3 at 400 V, CLASS 10, IP54, 205 x 245 x 215 mm.","salesMarkdown":"## Reversing motor starter with AS-Interface bus communication The 3RK4320-3BQ54-1BA3: The bimetal motor protection is set to CLASS 10 trip characteristic, providing overload protection for standard motor starting profiles without nuisance tripping. ## AC-3 motor switching and thermal limits At AC-3 duty (cage motor starting/switching) the rated operational current is 0.8 A at 400 V — this is the load current the starter handles during motor start and run, not a resistive-heating rating. The operating frequency is rated at 80 cycles per hour minimum, which governs the thermal recovery between starts; exceeding this rate without derating risks bimetal drift and premature trip. Ambient temperature range of -25 to +50 °C defines the enclosure environment — above 50 °C the bimetal trip curve shifts and the starter must be derated per the manufacturer's curve. ## Panel integration and mounting flexibility The enclosure measures 205 mm deep, 245 mm wide, and 215 mm high, with IP54 protection suitable for control cabinets in industrial environments where dust and splash ingress is expected. The unit includes a motor brake output (400 V AC) and short-circuit protection via circuit-breakers, reducing external component count in the panel. ## Lifecycle and sourcing posture Substance prohibition compliance is dated 05/01/2012, confirming RoHS/REACH adherence per the manufacturer's declaration.","metaTitle":"Siemens 3RK4320-3BQ54-1BA3 SIRIUS Motor Starter","metaDescription":"Siemens SIRIUS 3RK4320-3BQ54-1BA3 reversing motor starter, 0.8 A AC-3 at 400 V, CLASS 10, AS-Interface, IP54. Current lifecycle stage. 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","title":"3RK4320-3BQ54-1BA3","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 400 V AC (internal) Performance class 0.80 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":"0.8 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":"0.8 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":"0.55 ... 0.8 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/994b5d39cffa6549101c39c92ea7b6e8.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=514021&mlfb=3RK4320-3BQ54-1BA3"},"ai":{"faq":[{"question":"What is 3RK4320-3BQ54-1BA3's listed depth?","answer":"The depth is 205 mm, with a width of 245 mm and height of 215 mm. These dimensions govern the cabinet cutout and clearance for cable entry."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK4320-3BQ54-1BA3","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/3RK4320-3BQ54-1BA3 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}}