{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2120-1KD24-0AP0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2120-1KD24-0AP0","canonicalUrl":"https://aoctrl.com/siemens/3RA2120-1KD24-0AP0","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2120-1KD24-0AP0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2120-1KD24-0AP0 direct-on-line starter, Size S0, 45 mm width, 155 mm depth, 260 mm height, Class 10 trip, for 60 mm busbar systems, includes 3RT2024-1AP00 contactor and 3RA2921-1AA00 link module.","salesMarkdown":"## What's in the box — integrated starter package This 3RA2120-1KD24-0AP0 is a pre-assembled direct-on-line starter from the SIRIUS family, Size S0. It ships with the 3RT2024-1AP00 contactor and the 3RA2921-1AA00 link module already matched — no separate ordering or wiring of the contactor-coil circuit. ## Trip class and motor protection The maximum rated operational voltage is 690 V, covering 400 V and 480 V common in North American and European panels. ## Mounting and panel fit Mounts vertically on a 60 mm busbar system or standard 35 mm DIN rail. The 45 mm width and 155 mm depth leave room alongside other S0 feeders in a multi-motor panel. Clearance requirements: 50 mm upward, 20 mm forward, 20 mm at the sides, 10 mm downward — plan your enclosure depth and gland-plate layout accordingly.","metaTitle":"Siemens 3RA2120-1KD24-0AP0 SIRIUS Direct Starter, S0, 45 mm","metaDescription":"Siemens 3RA2120-1KD24-0AP0 SIRIUS direct-on-line starter, S0 size, 45 mm wide, Class 10 trip. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"155 mm","Width":"45 mm","title":"3RA2120-1KD24-0AP0","Height":"260 mm","Upwards":"50 mm","Forwards":"20 mm","at 50 Hz":"0.25","Backwards":"0 mm","Downwards":"10 mm","Trip Class":"CLASS 10","At The Side":"20 mm","Rated Value":"690 V","description":"Load feeder fuseless, Direct-on-line starting 400 V AC, Size S0 9.00...12.5 A 230 V AC screw terminal for 60 mm busbar systems (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":"for snapping onto 60 mm busbar systems","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 230 V rated value":"2 hp","at 400 V rated value":"5 500 kW","at 480 V rated value":"11 A","at 50 Hz rated value":"230 ... 230 V","at 600 V rated value":"10 A","Design Of The Product":"for 60 mm busbars","For Main Current Circuit":"screw-type terminals","Temperature Compensation":"-20 ... +60 °C","at 110/120 V rated value":"0.75 hp","at 200/208 V rated value":"3 hp","at 220/230 V rated value":"3 hp","at 460/480 V rated value":"7.5 hp","at 575/600 V rated value":"10 hp","Of The Supplied Contactor":"3RT2024-1AP00","Of The Supplied Link Module":"3RA2921-1AA00","Size Of The Circuit-Breaker":"S00","at AC-3 rated value maximum":"690 V","at AC-3 at 400 V rated value":"12 A","at AC-3e rated value maximum":"690 V","Substance Prohibitance (Date)":"10/01/2009","at AC-3e at 400 V rated value":"12 A","Design Of The Overload Release":"thermal (bimetallic)","Of The Supplied Busbar Adapter":"8US1251-5NT10","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":"3RV2011-1KA10","degree of protection NEMA rating":"other","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"Yes","Relative Humidity During Operation":"10 ... 95 %","Without Load Current Share Typical":"7.6 W","Surge Voltage Resistance Rated Value":"6 kV","at AC in hot operating state per pole":"3.4 W","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","apparent holding power of magnet coil at AC":"7.6 VA","protocol is supported AS-Interface protocol":"No","with high demand rate according to SN 31920":"73 %","reference code according to IEC 81346-2:2019":"Q","shock resistance according to IEC 60068-2-27":"6g / 11 ms","Type Of Voltage Of The Control Supply Voltage":"AC","at 400 V according to IEC 60947-4-1 rated value":"150 000 A","Inductive Power Factor With The Holding Power Of The Coil":"0.25","Mechanical Service Life (Operating Cycles) Of Contactor Typical":"10 000 000","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"163 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":"9 ... 12.5 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/88a98745fe60a44b11d5698408479b4e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=257970&mlfb=3RA2120-1KD24-0AP0"},"ai":{"faq":[{"question":"What contactor and link module come with this starter?","answer":"The package includes the 3RT2024-1AP00 contactor and the 3RA2921-1AA00 link module, pre-assembled as a matched set."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2120-1KD24-0AP0","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/3RA2120-1KD24-0AP0 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}}