{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK4320-3CQ51-0BA2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK4320-3CQ51-0BA2","canonicalUrl":"https://aoctrl.com/siemens/3RK4320-3CQ51-0BA2","factsUrl":"https://aoctrl.com/api/mcp/products/3RK4320-3CQ51-0BA2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RK4320-3CQ51-0BA2 motor starter, AS-Interface, direct starter, 1 A AC-3 at 400 V, CLASS 10, IP54, 205 x 245 x 215 mm.","salesMarkdown":"## AS-Interface motor starter, CLASS 10, 1 A The 3RK4320-3CQ51-0BA2: It carries a CLASS 10 trip curve for bimetal motor protection, meaning it trips within 10 seconds at 600% of the set current — a standard fit for protecting general-purpose motors against overload without nuisance tripping during start-up. ## Ratings and panel fit The control supply is 20.4... 26.4 V DC. The enclosure measures 205 mm deep, 245 mm wide, and 215 mm tall, with an IP54 rating that keeps dust and splash out in cabinet or standalone mounting. Ambient operating range is -25 to +50 °C.","metaTitle":"Siemens 3RK4320-3CQ51-0BA2 Motor Starter, 1 A AC-3, CLASS 10","metaDescription":"Siemens SIRIUS 3RK4320-3CQ51-0BA2 motor starter, AS-Interface, 1 A AC-3 at 400 V, CLASS 10, IP54, current lifecycle. Sourced 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 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 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":"0.3 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","maximum short-circuit current breaking capacity (Icu) at 400 V rated value":"50 000 A","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"0.7 ... 1 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/805978a2987bede535ec828607985d3d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=125755&mlfb=3RK4320-3CQ51-0BA2","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK4320-3CQ51-0BA2/alternatives.json"},"ai":{"faq":[{"question":"What is the rated current for 3RK4320-3CQ51-0BA2 in AC-3 duty?","answer":"The AC-3 rated current at 400 V is 1 A. This is the value for switching motor loads under typical starting conditions."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK4320-3CQ51-0BA2","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/3RK4320-3CQ51-0BA2 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}}