{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2120-1JA24-0AP6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2120-1JA24-0AP6","canonicalUrl":"https://aoctrl.com/siemens/3RA2120-1JA24-0AP6","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2120-1JA24-0AP6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2120-1JA24-0AP6 non-fused motor starter, Size S0, direct starter, Class 10 thermal bimetallic overload relay, 690 V AC-3 max, snap-on DIN rail.","salesMarkdown":"## What this SIRIUS starter delivers The 3RA2120-1JA24-0AP6 is a Siemens SIRIUS non-fused motor starter — a direct starter in Size S0, meaning the contactor and overload relay are pre-assembled and wired as a single unit for a motor branch circuit. It ships with the 3RT2024-1AP60 contactor and the 3RA2921-1AA00 link module already matched, so you bolt it in and land your motor leads. The thermal bimetallic overload release gives you Class 10 trip protection — fast enough to protect a standard squirrel-cage rotor on start-up without nuisance tripping. ## Mounting and panel fit Mounting position is vertical only. The footprint is 45 mm wide by 193.1 mm tall by 97.1 mm deep — that 45 mm width is a single modular unit on the rail, so it fits a standard S0-size cutout in a panel layout. Clearance spaces: 30 mm upwards, 10 mm forwards, 10 mm downwards, 9 mm at the side, and 0 mm backwards. That zero-clearance rear face means it can sit flush against a backplate or busbar, saving depth in a tight enclosure. We source it through authorized industrial distribution channels.","metaTitle":"Siemens 3RA2120-1JA24-0AP6 SIRIUS Motor Starter, Size S0","metaDescription":"Siemens 3RA2120-1JA24-0AP6 SIRIUS non-fused motor starter, Size S0, Class 10 thermal overload, 690 V max. Direct starter, snap-on DIN rail. Quoted to order.","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":"1.5 hp","at 400 V rated value":"4 000 W","at 480 V rated value":"7.92 A","at 50 Hz rated value":"176 ... 242 V","at 500 V rated value":"5 500 W","at 60 Hz rated value":"192 ... 264 V","at 600 V rated value":"9.19 A","Design Of The Product":"direct starter","at 110/120 V rated value":"0.5 hp","at 200/208 V rated value":"2 hp","at 220/230 V rated value":"3 hp","at 460/480 V rated value":"5 hp","at 575/600 V rated value":"7.5 hp","Of The Supplied Contactor":"3RT2024-1AP60","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","Design Of The Short-Circuit Trip":"magnetic","Of The Supplied Circuit-Breakers":"3RV2011-1JA10","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":"8.5 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 (Operating Cycles) Of Contactor Typical":"10 000 000","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"130 A","insulation voltage with degree of pollution 3 at AC rated value":"690 V","Type Of Connectable Conductor Cross-Sections For Main Contacts Stranded":"1 ... 10 mm², 2x (2.5 ... 6 mm²)","Adjustable Current Response Value Current Of The Current-Dependent Overload Release":"7 ... 10 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/525067b9a57928ce4565eee220f99218.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=364744&mlfb=3RA2120-1JA24-0AP6","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA2120-1JA24-0AP6/alternatives.json"},"ai":{"faq":[{"question":"What is the trip class of the overload on the 3RA2120-1JA24-0AP6?","answer":"Class 10."},{"question":"What contactor and link module come with this motor starter?","answer":"It ships with the 3RT2024-1AP60 contactor and the 3RA2921-1AA00 link module already assembled. You do not need to order them separately — the starter is a single order code with the pair integrated."},{"question":"Can I screw-mount this starter instead of using DIN rail?","answer":"Yes. The mounting position must be vertical."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2120-1JA24-0AP6","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/3RA2120-1JA24-0AP6 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}}