{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK4320-3EQ54-1BA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK4320-3EQ54-1BA2","canonicalUrl":"https://aoctrl.com/siemens/3RK4320-3EQ54-1BA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RK4320-3EQ54-1BA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor starter MCU for AS-Interface, reversing starter, 1.6 A AC-3 at 400 V, Class 10, IP54, 205 mm depth, 245 mm width, 215 mm height.","salesMarkdown":"## SIRIUS reversing starter for AS-Interface lines Rated 1.6 A at AC-3 duty on 400 V, it switches reversing motor loads up to that current — the Class 10 bimetal overload relay ensures rapid trip under locked-rotor conditions, protecting the motor winding before thermal damage sets in. Two digital inputs are available for local control signals; the unit accepts a 340...440 V operating voltage and draws its control supply from a 20.4...26.4 V DC source. ## Bus integration and mounting AS-Interface is the onboard protocol — no PROFIBUS or PROFINET variant here. The bus connection handles parameterization and status feedback, reducing point-to-point wiring in the panel. The IP54 rating means it's protected against dust ingress and splashing water — suitable for floor-level cabinet placement near washdown zones. Dimensions are 245 mm wide, 205 mm deep, 215 mm high. Account for the 205 mm depth when routing AS-Interface cables and motor leads behind the unit on the DIN rail. It is a reversing starter with integrated brake control output — a specific combination that makes direct substitution with a standard contactor block non-trivial. No official replacement order code has been published, so the BOM line stays with this MPN.","metaTitle":"Siemens 3RK4320-3EQ54-1BA2 SIRIUS Reversing Motor Starter","metaDescription":"Siemens SIRIUS reversing motor starter for AS-Interface networks. Rated 1.6A AC-3 at 400V, Class 10 trip, IP54. Current production.","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":"reversing 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=4781&mlfb=3RK4320-3EQ54-1BA2","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK4320-3EQ54-1BA2/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between a reversing and non-reversing motor starter?","answer":"This reversing starter integrates two contactors with mechanical interlock to switch motor direction, plus a bimetal overload relay — all in one unit. A non-reversing starter uses a single contactor and cannot reverse the motor without external wiring changes."},{"question":"Where can I buy 3RK4320-3EQ54-1BA2?","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/3RK4320-3EQ54-1BA2","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/3RK4320-3EQ54-1BA2 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}}