{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK4320-5DQ61-0BA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK4320-5DQ61-0BA3","canonicalUrl":"https://aoctrl.com/siemens/3RK4320-5DQ61-0BA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK4320-5DQ61-0BA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS MCU motor starter, 3RK4320-5DQ61-0BA3, direct starter, solid-state motor protection, CLASS 10, AS-Interface bus, IP54, 1.25 A rated operational current at AC-3 400 V.","salesMarkdown":"The Siemens 3RK4320-5DQ61-0BA3 is a SIRIUS MCU motor starter designed for AS-Interface bus communication, meaning it integrates motor starting, solid-state overload protection, and network control into a single enclosure for distributed automation layouts. Rated 1.25 A at AC-3 duty at 400 V, this direct starter handles small induction motors (roughly 0.37 kW at 400 V three-phase) and carries a CLASS 10 trip curve, so it clears a stalled rotor fast enough for most conveyor and pump applications without nuisance tripping on normal start-up. The solid-state switching contact and solid-state motor protection mean there are no mechanical contacts to weld or arc, which suits frequent cycling — the rated operating frequency is up to 3,600 operations per hour. ## Bus integration and I/O This unit speaks AS-Interface natively (AS-i protocol supported), with two digital inputs onboard for local sensors or pushbuttons, and a brake control output rated for 400 V AC. The control supply voltage is 20.4 to 26.4 V DC, which is the standard AS-i power rail, so it drops into an existing AS-i network without a separate control transformer. No PROFIBUS DP or PROFINET protocol onboard — communication is AS-Interface only, so plan the network gateway accordingly. The enclosure measures 290 mm wide × 215 mm high × 205 mm deep and carries an IP54 protection class, so it's suited for control cabinets in dusty or damp industrial environments but not for direct washdown zones.","metaTitle":"Siemens 3RK4320-5DQ61-0BA3 SIRIUS MCU Motor Starter, AS-i","metaDescription":"Siemens SIRIUS 3RK4320-5DQ61-0BA3 MCU motor starter for AS-Interface. Solid-state, CLASS 10, IP54, 1.25 A AC-3 at 400 V. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"205 mm","Width":"290 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":"1.25 A","brake control with 24 V DC":"No","Operating Frequency Minimum":"3 600 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":"solid-state","at AC-3 at 400 V rated value":"1.25 A","Operating Voltage Rated Value":"340 ... 460 V","Substance Prohibitance (Date)":"05/01/2012","Design Of The Switching Contact":"solid-state","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":"0.4 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":"0.32 ... 1.25 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=391564&mlfb=3RK4320-5DQ61-0BA3","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK4320-5DQ61-0BA3/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK4320-5DQ61-0BA3","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/3RK4320-5DQ61-0BA3 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}}