{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK4320-3JQ54-0BA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK4320-3JQ54-0BA3","canonicalUrl":"https://aoctrl.com/siemens/3RK4320-3JQ54-0BA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK4320-3JQ54-0BA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RK4320-3JQ54-0BA3 motor starter MCU for AS-Interface, direct starter, 4 A at 400 V AC-3, CLASS 10, IP54, 205 x 245 x 215 mm.","salesMarkdown":"## AS-Interface motor starter for distributed control The 3RK4320-3JQ54-0BA3: The CLASS 10 bimetal overload relay means it trips fast enough to protect standard squirrel-cage motors during a stall or jam — the bimetal element tracks the motor's thermal curve without a separate overload block. ## Panel fit and mounting flexibility Envelope is 205 mm deep by 245 mm wide by 215 mm high — a compact footprint for a combined starter with bus communication and brake output. IP54 protection means it handles dust and splashing water — suitable for dry indoor industrial environments but not washdown zones. ## Control supply and brake output Control supply is 24 V DC nominal (20.4 to 26.4 V range) — standard for industrial panels — and the unit includes a motor brake output for 400 V AC brakes, saving an external contactor for the brake coil. Two digital inputs are available for local pushbuttons or limit switches, reducing the need for separate I/O modules at the motor. Operating frequency is rated at 80 operations per hour minimum — this is a process-duty starter, not a high-cycling application like a rapid-indexing conveyor. ## Lifecycle and sourcing RoHS compliance date is May 1, 2012 — the design predates later substance restrictions but meets the 2012 deadline for the original RoHS directive.","metaTitle":"Siemens 3RK4320-3JQ54-0BA3 Motor Starter, AS-Interface","metaDescription":"Siemens SIRIUS 3RK4320-3JQ54-0BA3 motor starter MCU for AS-Interface. 4 A at 400 V AC-3, CLASS 10, IP54. Current lifecycle stage. 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":"3RK4320-3JQ54-0BA3","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 400 V AC (internal) Performance class 4.00 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":"4 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":"4 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":"1.5 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":"2.8 ... 4 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cd6e914f6bff0ec249ae63b8dc5470a5.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=435701&mlfb=3RK4320-3JQ54-0BA3"},"ai":{"faq":[{"question":"What AS-Interface protocol does this starter support?","answer":"The unit supports the AS-Interface protocol and includes bus communication for integration into an AS-i network. It does not support PROFIBUS DP or PROFINET."},{"question":"What is the rated current for motor switching?","answer":"The same 4 A rating applies at 400 V AC for general use."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK4320-3JQ54-0BA3","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/3RK4320-3JQ54-0BA3 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}}