{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RK4320-3KQ54-0BA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RK4320-3KQ54-0BA3","canonicalUrl":"https://aoctrl.com/siemens/3RK4320-3KQ54-0BA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RK4320-3KQ54-0BA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS motor starter MCU for AS-Interface, direct starter design, 5 A at 400 V AC-3, CLASS 10, IP54, 205 x 245 x 215 mm.","salesMarkdown":"## What the 5 A AC-3 rating means for your motor load This unit integrates a motor brake output (400 V AC) so it handles direct-on-line starting with an external brake coil — common for hoists, conveyors, and machine axes that need a holding brake. The two digital inputs on the AS-Interface bus let you wire limit switches or E-stop feedback directly into the starter, reducing separate I/O modules. ## Where this starter fits in a panel At 205 mm deep, 245 mm wide, and 215 mm tall, the 3RK4320-3KQ54-0BA3 is sized for a standard enclosure with enough depth for the AS-Interface connection and wiring. IP54 protection means it handles dust and splashing water, so it fits in control cabinets on factory floors or in light industrial environments where occasional washdown isn't directed at the enclosure. The control supply is 20.4 to 26.4 V DC, so it takes a standard 24 V DC power supply from the cabinet bus. The main circuit is three-pole, rated for 340 to 440 V AC at 50 or 60 Hz.","metaTitle":"Siemens 3RK4320-3KQ54-0BA3 SIRIUS Motor Starter, 5 A AC-3","metaDescription":"Siemens 3RK4320-3KQ54-0BA3 SIRIUS motor starter MCU for AS-Interface. Direct starter, 5 A at 400 V AC-3, CLASS 10, IP54. 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":"5 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":"5 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":"1.5 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":"3.5 ... 5 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8ea7a1cb161f2db7ebe767f4ad6aa47a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=314419&mlfb=3RK4320-3KQ54-0BA3","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RK4320-3KQ54-0BA3/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RK4320-3KQ54-0BA3","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/3RK4320-3KQ54-0BA3 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}}