{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2120-1AA23-0BB4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2120-1AA23-0BB4","canonicalUrl":"https://aoctrl.com/siemens/3RA2120-1AA23-0BB4","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2120-1AA23-0BB4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2120-1AA23-0BB4 non-fused motor starter, direct starter design, S0 frame size, Class 10 thermal bimetallic overload, 550 W at 400 V AC-3, 24 V coil, DIN-rail snap-on.","salesMarkdown":"## What this SIRIUS 3RA2120-1AA23-0BB4 motor starter does The Siemens 3RA2120-1AA23-0BB4 is a non-fused direct motor starter from the SIRIUS family, combining a contactor and a thermal bimetallic overload relay in one S0-frame package. The 24 V coil voltage matches standard control-voltage rails in industrial panels; the unit operates on 50/60 Hz supply. ## Mounting and panel fit — S0 frame, DIN-rail snap-on Clearance requirements: 30 mm upwards, 10 mm forwards, 10 mm downwards, 9 mm at the sides, and 0 mm backwards — plan the enclosure depth and gland-plate layout accordingly. The supplied contactor is a 3RT2023-1BB40 and the link module is 3RA2921-1BA00 — both are standard SIRIUS components, so spares and replacement parts are readily available through the same supply chain. ## Environmental and compliance documentation Operating temperature range is -20 to +60 °C; storage range is -50 to +80 °C; transport range is -55 to +80 °C — the wide storage envelope supports cold-weather warehousing. Substance prohibitance date is 03/01/2017, indicating RoHS and REACH compliance documentation is available from Siemens for this order code.","metaTitle":"Siemens 3RA2120-1AA23-0BB4 SIRIUS Motor Starter","metaDescription":"Siemens 3RA2120-1AA23-0BB4 SIRIUS non-fused motor starter, 550 W at 400 V AC-3, Class 10 thermal overload. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Motor Starters"],"specifications":{"Depth":"107 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":"24 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":"0.1 hp","at 400 V rated value":"550 W","at 480 V rated value":"1.6 A","at 500 V rated value":"550 W","at 600 V rated value":"1.3 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":"0.75 hp","Of The Supplied Contactor":"3RT2023-1BB40","For Main Contacts Stranded":"1 ... 10 mm², 2x (2.5 ... 6 mm²)","Of The Supplied Link Module":"3RA2921-1BA00","Size Of The Circuit-Breaker":"S00","at AC-3 rated value maximum":"690 V","Substance Prohibitance (Date)":"03/01/2017","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":"3RV2011-1AA10","Product Extension Auxiliary Switch":"Yes","holding power of magnet coil at DC":"5.9 W","Surge Voltage Resistance Rated Value":"6 kV","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","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":"1.5 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":"20.8 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":"1.1 ... 1.6 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/5d4bbead98fb026004e14ef04a250d5d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=410893&mlfb=3RA2120-1AA23-0BB4","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA2120-1AA23-0BB4/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2120-1AA23-0BB4","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/3RA2120-1AA23-0BB4 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}}