{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2120-1HE24-0BB4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2120-1HE24-0BB4","canonicalUrl":"https://aoctrl.com/siemens/3RA2120-1HE24-0BB4","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2120-1HE24-0BB4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2120-1HE24-0BB4 direct online starter, size S0, 3 kW at 400 V AC-3, 24 V DC coil, Class 10 thermal overload, spring-loaded terminals, 45 mm wide.","salesMarkdown":"## Motor rating and trip class for the load The 3RA2120-1HE24-0BB4: This SIRIUS direct online starter is rated 3 kW at 400 V and 8 A at 480 V in AC-3 duty, covering standard three-phase motor loads up to those currents at 50/60 Hz. The 24 V DC coil (rated value 24... 24 V) keeps the control circuit isolated from the motor power side, which simplifies wiring in PLC-controlled panels where 24 VDC is the standard I/O voltage. The supplied contactor (3RT2024-2BB40) and circuit-breaker (3RV2021-1HA20) are pre-assembled with the link module (3RA2921-2AA00), so the unit arrives as a single mechanical assembly ready to wire. ## Active production and sourcing posture The substance prohibition date of 03/01/2017 confirms RoHS compliance for the European market, which covers the majority of industrial panel builds.","metaTitle":"Siemens 3RA2120-1HE24-0BB4 SIRIUS Direct Starter, S0","metaDescription":"Siemens 3RA2120-1HE24-0BB4 SIRIUS direct online starter, size S0, 3 kW at 400 V AC-3, 24 V DC coil, Class 10, spring terminals, active production, sourced to","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"107 mm","Width":"45 mm","title":"3RA2120-1HE24-0BB4","Height":"243 mm","Upwards":"50 mm","Forwards":"20 mm","Backwards":"0 mm","Downwards":"10 mm","Trip Class":"CLASS 10","At The Side":"20 mm","Rated Value":"24 ... 24 V","description":"Load feeder fuseless, Direct-on-line starting 400 V AC, Size S0 5.50...8.00 A 24 V DC Spring-type terminal for installation on standard mounting rail (also fulfills type of coordination 1) Type of coordination 2, Iq = 150 kA 1 NO+1 NC (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","PROFIsafe protocol":"No","Product Brand Name":"SIRIUS","Type Of Assignment":"2","Product Designation":"Direct (on-line) starter","Size Of Load Feeder":"S0","PROFINET IO protocol":"No","at 400 V rated value":"3 000 W","at 480 V rated value":"8 A","Design Of The Product":"for standard rail or screw mounting","For Main Current Circuit":"spring-loaded terminals","Temperature Compensation":"-20 ... +60 °C","at 220/230 V rated value":"2 hp","at 460/480 V rated value":"5 hp","at 575/600 V rated value":"5 hp","Of The Supplied Contactor":"3RT2024-2BB40","Of The Supplied Link Module":"3RA2921-2AA00","Size Of The Circuit-Breaker":"S0","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","Design Of The Short-Circuit Trip":"magnetic","Of The Supplied Circuit-Breakers":"3RV2021-1HA20","degree of protection NEMA rating":"other","For Auxiliary And Control Circuit":"spring-loaded terminals","Product Extension Auxiliary Switch":"Yes","Relative Humidity During Operation":"10 ... 95 %","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","protocol is supported AS-Interface protocol":"No","with high demand rate according to SN 31920":"73 %","shock resistance according to IEC 60068-2-27":"6g / 11 ms","Type Of Voltage Of The Control Supply Voltage":"DC","at 400 V according to IEC 60947-4-1 rated value":"150 000 A","operational current at AC-3 at 400 V rated value":"6.5 A","Mechanical Service Life (Switching Cycles) Of Contactor Typical":"10 000 000","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"5.5 ... 8 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/ba3f94b8da3a958783a6365d8a2b5286.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=58328&mlfb=3RA2120-1HE24-0BB4"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2120-1HE24-0BB4","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/3RA2120-1HE24-0BB4 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}