{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2120-4DA27-0AK6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2120-4DA27-0AK6","canonicalUrl":"https://aoctrl.com/siemens/3RA2120-4DA27-0AK6","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2120-4DA27-0AK6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2120-4DA27-0AK6 non-fused load feeder, S0 size, direct starter, CLASS 10, 22.2 A at 480 V AC-3, 45 mm wide, screw and snap-on DIN rail mount.","salesMarkdown":"## What this SIRIUS load feeder delivers Rated for AC-3 duty up to 690 V, it delivers 22.2 A at 480 V and 21.9 A at 600 V, with motor power ratings of 11 kW at 400 V, 15 kW at 500 V, and 22 kW at 690 V. The CLASS 10 trip class means the overload relay will trip within 10 seconds at 7.2× the set current — standard protection for standard induction motor starts where the acceleration time stays under 10 seconds. This is a direct-starter assembly: the contactor and overload relay are integrated into one unit, so it switches the motor directly across the line without a soft-start or VFD. Mounts on a 35 mm DIN rail via the screw and snap-on mechanism, occupying 45 mm of rail width with a height of 193.1 mm and depth of 97.1 mm. Clearance requirements: 30 mm upward, 10 mm forward, 10 mm downward, 9 mm at the sides, and 0 mm backward — the back sits flush against the mounting surface. Main contact wiring accepts stranded conductors from 1 to 10 mm², or two conductors of 2.5 to 6 mm² each. ## Environmental range Coil rated for 110 V at 50 Hz and 120 V at 60 Hz (type of assignment 2), meaning the control circuit is separate from the main power circuit.","metaTitle":"Siemens 3RA2120-4DA27-0AK6 SIRIUS Load Feeder","metaDescription":"Siemens 3RA2120-4DA27-0AK6 SIRIUS non-fused load feeder, S0 size, direct starter, CLASS 10 trip, 22.2 A at 480 V AC-3. Current lifecycle stage.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"97.1 mm","Width":"45 mm","title":"3RA2120-4DA27-0AK6","Height":"193.1 mm","Upwards":"30 mm","Forwards":"10 mm","Backwards":"0 mm","Downwards":"10 mm","Trip Class":"CLASS 10","At The Side":"9 mm","Rated Value":"690 V","description":"FUSELESS LOAD FEEDER DIRECT START, AC 400V, SZ. S0, 18...25A, AC 110/120V 50/60HZ SCREW TERMINAL FOR DIN RAIL MOUNTING, TYPE OF ASSIGNMENT 2,IQ = 150KA (ALSO TYPE OF ASSIGNMENT 1) 1NO+1NC (CONTACTOR)","During Storage":"-50 ... +80 °C","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","During Transport":"-50 ... +80 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail","Mounting Position":"vertical","Product Brand Name":"SIRIUS","Type Of Assignment":"2","Degree Of Pollution":"3","Product Designation":"non-fused load feeders 3RA2","Size Of Load Feeder":"S0","at 230 V rated value":"3 hp","at 400 V rated value":"11 000 W","at 480 V rated value":"22.2 A","at 50 Hz rated value":"110 V","at 500 V rated value":"15 000 W","at 60 Hz rated value":"120 V","at 600 V rated value":"21.9 A","at 690 V rated value":"22 000 W","Design Of The Product":"direct starter","at 110/120 V rated value":"2 hp","at 200/208 V rated value":"5 hp","at 220/230 V rated value":"7.5 hp","at 460/480 V rated value":"15 hp","at 575/600 V rated value":"20 hp","Of The Supplied Contactor":"3RT2027-1AK60","For Main Contacts Stranded":"1 ... 10 mm², 2x (2.5 ... 6 mm²)","Of The Supplied Link Module":"3RA2921-1AA00","Size Of The Circuit-Breaker":"S0","at AC-3 rated value maximum":"690 V","Substance Prohibitance (Date)":"05/01/2012","Design Of The Overload Release":"thermal (bimetallic)","Design Of The Switching Contact":"electromechanical","Operating Frequency Rated Value":"50 ... 60 Hz","at AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 8)","Design Of The Short-Circuit Trip":"magnetic","Of The Supplied Circuit-Breakers":"3RV2021-4DA10","Product Extension Auxiliary Switch":"Yes","Surge Voltage Resistance Rated Value":"6 kV","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","apparent holding power of magnet coil at AC":"9.8 VA","shock resistance according to IEC 60068-2-27":"6g / 11 ms","at 400 V according to IEC 60947-4-1 rated value":"153 000 A","at 500 V according to IEC 60947-4-1 rated value":"5 000 A","at 690 V according to IEC 60947-4-1 rated value":"2 000 A","operational current at AC-3 at 400 V rated value":"22 A","Type Of Electrical Connection For Main Current Circuit":"screw-type terminals","Mechanical Service Life (Switching Cycles) Of Contactor Typical":"10 000 000","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"325 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"20 ... 25 A","Connectable Conductor Cross-Section For Main Contacts Finely Stranded With Core End Processing":"1 ... 6 mm²"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/3381ece494157a70cfe690331a0fefa4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=52569&mlfb=3RA2120-4DA27-0AK6"},"ai":{"faq":[{"question":"Does 3RA2120-4DA27-0AK6 include a contactor and overload relay?","answer":"Yes, it is a complete direct-starter assembly that includes the supplied contactor (3RT2027-1AK60) and link module (3RA2921-1AA00), integrating the contactor and overload relay into one unit."},{"question":"Where can I buy 3RA2120-4DA27-0AK6 with fast delivery?","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":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2120-4DA27-0AK6","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/3RA2120-4DA27-0AK6 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}