{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK4320-3EQ54-0BA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK4320-3EQ54-0BA2","canonicalUrl":"https://aoctrl.com/siemens/3RK4320-3EQ54-0BA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RK4320-3EQ54-0BA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor starter MCU for AS-Interface, 3RK4320-3EQ54-0BA2, direct starter design, 1.6 A at AC-3 400 V, IP54, Class 10 trip, 205 mm depth.","salesMarkdown":"It is a direct starter — meaning it connects the motor directly to the supply for full-voltage starting, without a soft-start or VFD ramp. The 1.6 A rating at AC-3 400 V tells you the motor load it can switch under typical induction-motor starting conditions; AC-3 covers starting and plugging of squirrel-cage motors, so this rating governs the real-world motor size it can handle, not just the resistive load. Rated 1.6 A at AC-3 400 V — this is the motor-switching current under starting duty. For a 400 V three-phase induction motor, that roughly corresponds to a 0.75 kW output, though verify against your motor's full-load amps. Operating voltage range is 340...440 V, covering standard 400 V line supplies with tolerance for brownout conditions. Control supply is 20.4...26.4 V DC. The AS-Interface protocol is supported natively. Two digital inputs are onboard. The unit includes a motor brake output. IP54 protection means the enclosure is dust-protected and splash-proof — suitable for panel mounting in industrial environments where occasional water spray or dust ingress is possible, but not for direct washdown zones. This motor starter sits on the AS-Interface network as a slave device, handling motor start/stop, overload protection, and feedback directly over the two-wire AS-i cable. It is a self-contained unit: the 3-pole main circuit, the bimetal overload relay, and the AS-Interface communication are integrated into one housing. Dimensions are 245 mm wide, 215 mm high, 205 mm deep — sized for a standard industrial enclosure, with enough room for cable glands and AS-i bus wiring. The operating frequency is rated at 80 cycles per hour, so it is suited for applications with moderate switching rates — conveyors, pumps, fans — but not for high-speed indexing or rapid reversing where contactor life would be consumed quickly.","metaTitle":"Siemens 3RK4320-3EQ54-0BA2 SIRIUS Motor Starter, 1.6 A AC-3","metaDescription":"Siemens SIRIUS 3RK4320-3EQ54-0BA2 motor starter, 1.6 A rated at AC-3 400 V, AS-Interface communication, IP54, Class 10 trip. Quoted to order against an 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":"1.6 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":"1.6 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":"0.6 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":"1.1 ... 1.6 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=533156&mlfb=3RK4320-3EQ54-0BA2","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK4320-3EQ54-0BA2/alternatives.json"},"ai":{"faq":[{"question":"Is the 3RK4320-3EQ54-0BA2 suitable for direct-on-line (DOL) starting?","answer":"Yes, it is a direct starter design, meaning it connects the motor directly to the supply for full-voltage starting. That is the standard DOL topology."},{"question":"What communication protocol does the 3RK4320-3EQ54-0BA2 use?","answer":"It uses AS-Interface protocol natively — no gateway or converter needed for an AS-i line. It does not support PROFIBUS DP or PROFINET."},{"question":"What is the enclosure protection class of 3RK4320-3EQ54-0BA2?","answer":"IP54 — dust-protected and splash-proof, suitable for panel mounting in industrial environments but not for direct washdown zones."},{"question":"Does the 3RK4320-3EQ54-0BA2 require an external brake rectifier?","answer":"No. The unit includes a motor brake output, so it can drive a DC brake coil directly without an external brake rectifier module."},{"question":"Where can I buy 3RK4320-3EQ54-0BA2 available via RFQ confirmation?","answer":"This part is sourced to order against an RFQ. Availability and pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK4320-3EQ54-0BA2","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/3RK4320-3EQ54-0BA2 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}}