{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2120-1GD24-0AP0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2120-1GD24-0AP0","canonicalUrl":"https://aoctrl.com/siemens/3RA2120-1GD24-0AP0","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2120-1GD24-0AP0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS direct on-line starter, S0 size, 3RA2120-1GD24-0AP0, Class 10 thermal overload relay, for 60 mm busbar systems, 2.2 kW at 400 V.","salesMarkdown":"The Siemens 3RA2120-1GD24-0AP0 is a SIRIUS direct on-line starter in the S0 load feeder size, combining a contactor and a thermal bimetallic overload relay in one package designed to snap onto 60 mm busbar systems. It is a fully assembled functional unit — the supplied contactor is the 3RT2024-1AP00, the link module is 3RA2921-1AA00, and the busbar adapter is 8US1251-5NT10. The thermal bimetallic design gives a true RMS heating response, so it tracks actual motor heating through repeated starts. It is rated for a 2.2 kW motor at 400 V (AC-3 duty) and draws 4.8 A at 480 V, with horsepower ratings spanning 1 hp at 200/208 V up to 5 hp at 575/600 V. The maximum operating voltage is 690 V AC-3. Designed specifically for snapping onto 60 mm busbar systems — the fastening method and overall design are built for that rail pitch. Mounting position is vertical only. Dimensions: 260 mm height, 45 mm width, 155 mm depth. Clearance requirements: 50 mm upward, 20 mm forward, 20 mm at the side, 10 mm downward, 0 mm backward. This is a specified BOM-line part for panels built around 60 mm busbar systems. Submit an RFQ for current pricing and availability.","metaTitle":"Siemens 3RA2120-1GD24-0AP0 SIRIUS Direct On-Line Starter, S0","metaDescription":"Siemens SIRIUS 3RA2120-1GD24-0AP0 direct on-line starter, S0 size, Class 10 thermal overload, for 60 mm busbar. Active lifecycle, sourced 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","Height":"260 mm","Upwards":"50 mm","Forwards":"20 mm","Backwards":"0 mm","Downwards":"10 mm","Trip Class":"CLASS 10","At The Side":"20 mm","Rated Value":"690 V","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 400 V rated value":"2 200 W","at 480 V rated value":"4.8 A","at 50 Hz rated value":"230 ... 230 V","Design Of The Product":"for 60 mm busbars","For Main Current Circuit":"screw-type terminals","Temperature Compensation":"-20 ... +60 °C","at 200/208 V rated value":"1 hp","at 220/230 V rated value":"1.5 hp","at 460/480 V rated value":"3 hp","at 575/600 V rated value":"5 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","Substance Prohibitance (Date)":"10/01/2009","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":"3RV2011-1GA10","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 %","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":"8.5 VA","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":"AC","at 400 V according to IEC 60947-4-1 rated value":"150 000 A","operational current at AC-3 at 400 V rated value":"4.9 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":"4.5 ... 6.3 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=314255&mlfb=3RA2120-1GD24-0AP0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA2120-1GD24-0AP0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RA2120-1GD24-0AP0 and get a price?","answer":"This part is sourced to order against an RFQ through independent distribution channels. Submit a quote request for current pricing and availability."},{"question":"Does 3RA2120-1GD24-0AP0 work with 60 mm busbar?","answer":"Yes, it is specifically designed for snapping onto 60 mm busbar systems and comes supplied with the 8US1251-5NT10 busbar adapter."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2120-1GD24-0AP0","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/3RA2120-1GD24-0AP0 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}}