{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2120-1BA23-0AK6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2120-1BA23-0AK6","canonicalUrl":"https://aoctrl.com/siemens/3RA2120-1BA23-0AK6","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2120-1BA23-0AK6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2120-1BA23-0AK6 non-fused direct motor starter, 750 W at 400 V AC-3, Class 10 thermal bimetallic overload, S0 size, 45 mm width, 97.1 mm depth.","salesMarkdown":"## 750 W at 400 V — what the AC-3 rating means for the motor branch The 3RA2120-1BA23-0AK6: That 750 W figure at 400 V is the continuous motor power the starter can handle under normal starting and running conditions, provided the upstream short-circuit protection is coordinated for the S0 feeder size. This is the standard class for general-purpose motor starting — it lets the motor accelerate through the inrush without nuisance tripping, provided the start time stays under the 10-second ceiling. ## Mounting and panel fit — S0 footprint on DIN rail or screw-fixed The vertical mounting position is specified; horizontal or inverted mounting would shift the thermal overload calibration and is not supported without a derating check. The S0 feeder size (45 mm wide, 97.1 mm deep, 193.1 mm tall) matches the standard S0 contactor/circuit-breaker footprint — it occupies one 45 mm slot on the rail, leaving 30 mm clearance upward and 10 mm forward/downward for wiring and heat dissipation. The supplied contactor is a 3RT2023-1AK60, and the link module is 3RA2921-1AA00 — these are the factory-matched pair that give the starter its coordinated Type 2 protection profile. If you are replacing a failed unit in an existing panel, confirm that the replacement carries the same supplied contactor order code; swapping in a different contactor variant changes the coordination and voids the UL/IEC listing for the assembly. ## Active production — sourcing posture for the BOM line Operating ambient range is -20 to +60 °C, storage -50 to +80 °C, transport -55 to +80 °C. The thermal overload calibration is referenced to 40 °C ambient; above that, the trip current must be derated per the SIRIUS application manual. Pollution degree 3 (conductive pollution) means this starter is suitable for control panels in industrial environments where occasional condensation or light dust is present.","metaTitle":"Siemens 3RA2120-1BA23-0AK6 Motor Starter, 750 W at 400 V","metaDescription":"Siemens SIRIUS 3RA2120-1BA23-0AK6 non-fused motor starter, 750 W at 400 V AC-3, Class 10 thermal overload, S0 size.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"97.1 mm","Width":"45 mm","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","During Storage":"-50 ... +80 °C","lifecycle_stage":"current","During Operation":"-20 ... +60 °C","During Transport":"-55 ... +80 °C","Fastening Method":"Snap-mounted to DIN rail or screw-mounted with additional push-in lug","Mounting Position":"vertical","Product Brand Name":"SIRIUS","Type Of Assignment":"2","Degree Of Pollution":"3","Product Designation":"non-fused motor starter 3RA2","Size Of Load Feeder":"S0","at 230 V rated value":"0.13 hp","at 400 V rated value":"750 W","at 480 V rated value":"1.63 A","at 50 Hz rated value":"88 ... 121 V","at 500 V rated value":"750 W","at 60 Hz rated value":"96 ... 132 V","at 600 V rated value":"1.72 A","at 690 V rated value":"1 100 W","Design Of The Product":"direct starter","at 460/480 V rated value":"0.75 hp","at 575/600 V rated value":"1 hp","Of The Supplied Contactor":"3RT2023-1AK60","For Main Contacts Stranded":"1 ... 10 mm², 2x (2.5 ... 6 mm²)","Of The Supplied Link Module":"3RA2921-1AA00","Size Of The Circuit-Breaker":"S00","at AC-3 rated value maximum":"690 V","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":"3RV2011-1BA10","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":"7.2 VA","number of NC contacts for auxiliary contacts":"1","number of NO contacts for auxiliary contacts":"1","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","operational current at AC-3 at 400 V rated value":"1.9 A","Type Of Electrical Connection For Main Current Circuit":"screw-type terminals","Inductive Power Factor With The Holding Power Of The Coil":"0.28","Mechanical Service Life (Switching Cycles) Of Contactor Typical":"10 000 000","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"26 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":"1.4 ... 2 A","Connectable Conductor Cross-Section For Main Contacts Finely Stranded With Core End Processing":"1 ... 6 mm²"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/e2cf04999cc158dffc31d567216b48bf.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=110467&mlfb=3RA2120-1BA23-0AK6","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA2120-1BA23-0AK6/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for 3RA2120-1BA23-0AK6?","answer":"The SIRIUS 3RA2 series carries IEC/EN 60947-4-1 compliance for motor starters. The specific approvals (UL, CSA, CE, UKCA, EAC) are listed on the Siemens Industry Online Support page for this order code. RoHS and REACH declarations are available through the Siemens declaration-of-conformity portal using the 3RA2120-1BA23-0AK6 order code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2120-1BA23-0AK6","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/3RA2120-1BA23-0AK6 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}}