{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK4320-3PQ54-0BA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK4320-3PQ54-0BA3","canonicalUrl":"https://aoctrl.com/siemens/3RK4320-3PQ54-0BA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK4320-3PQ54-0BA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RK4320-3PQ54-0BA3, motor starter MCU for AS-Interface, direct starter, 12 A at AC-3/400 V, CLASS 10, IP54, 3-pole, with integrated brake control.","salesMarkdown":"It's a direct starter with electromechanical switching contacts, rated 12 A at AC-3/400 V — that's the motor-load switching current, not a resistive-heater rating. The same 12 A holds at AC/400 V general rating. Short-circuit protection is handled by upstream circuit-breakers, not fuses. The unit includes a motor brake output for 400 V AC brake control — useful for holding loads on conveyors or vertical axes. It carries 2 digital inputs and operates on a control supply of 20.4 to 26.4 V DC. Enclosure rating is IP54 — splash-proof and dust-limited, suited for cabinet-mount or protected field locations, not open washdown zones. Dimensions: 245 mm wide, 215 mm high, 205 mm deep. Three poles for the main current circuit. The AS-Interface bus connection handles both communication and power for the electronics — no separate control wiring for the bus, just the 24 V DC supply for the coil and auxiliaries. No official replacement or successor order code has been published. If you're holding a BOM slot with this MPN, it's stable for the foreseeable future. For volume or scheduled deliveries, submit an RFQ for current pricing and lead time.","metaTitle":"Siemens 3RK4320-3PQ54-0BA3 SIRIUS Motor Starter, 12 A AC-3","metaDescription":"Siemens SIRIUS 3RK4320-3PQ54-0BA3 motor starter MCU for AS-Interface. 12 A at AC-3/400 V, CLASS 10, IP54. Current lifecycle stage. Sourced to order against RFQ.","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":"12 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":"12 A","Operating Voltage Rated Value":"340 ... 440 V","Substance Prohibitance (Date)":"01.05.2012","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","reference code acc. to IEC 81346-2":"Q","Ambient Temperature During Operation":"-25 ... +50 °C","Product Component Motor Brake Output":"Yes","Type Of Voltage Of The Supply Voltage":"DC","with low demand rate acc. to SN 31920":"50 %","with high demand rate acc. to SN 31920":"75 %","Number Of Poles For Main Current Circuit":"3","control supply voltage at DC rated value":"20.4 ... 26.4 V","protocol is supported AS-Interface protocol":"Yes","operating power at AC-3 at 400 V rated value":"5.5 kW","B10 value with high demand rate acc. to SN 31920":"1 000 000","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":"9 ... 12.5 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=432386&mlfb=3RK4320-3PQ54-0BA3","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK4320-3PQ54-0BA3/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 3RK4320-3PQ54-0BA3?","answer":"This part is sourced to order against an RFQ through independent industrial distribution. Submit a request for current pricing and availability — we confirm both at quote time."},{"question":"What is the difference between SIRIUS 3RK4 and 3RK2?","answer":"The 3RK4 series is the AS-Interface bus-capable motor starter platform, while 3RK2 is an earlier generation without integrated bus communication. The 3RK4320-3PQ54-0BA3 includes onboard AS-Interface protocol support and 2 digital inputs."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK4320-3PQ54-0BA3","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/3RK4320-3PQ54-0BA3 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}}