{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2120-1JA24-0AP0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2120-1JA24-0AP0","canonicalUrl":"https://aoctrl.com/siemens/3RA2120-1JA24-0AP0","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2120-1JA24-0AP0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2120-1JA24-0AP0 direct on-line starter, S0 size, 10 A at 480 V, Trip Class 10, 690 V insulation, screw terminals, DIN rail mount.","salesMarkdown":"## What this SIRIUS direct starter delivers The Siemens 3RA2120-1JA24-0AP0 is a SIRIUS direct on-line starter in the S0 size — a pre-assembled combination of a contactor and overload relay, ready to bolt into a motor branch circuit. It ships with the 3RT2024-1AP00 contactor and the 3RA2921-1AA00 link module, so you're not sourcing those separately. Rated 10 A at 480 V (AC-3 duty), this starter handles a 7.5 hp motor at 460/480 V and a 10 hp motor at 575/600 V. The Trip Class 10 protection means it trips within 10 seconds at 600% of the set current — standard for general-purpose motor starting like pumps, fans, and conveyors. The insulation voltage is rated 690 V, giving headroom on 400/480/600 V systems without derating the main circuit. ## Mounting and panel fit Mounts via screw fixing or snaps onto 35 mm DIN rail — the dual-method gives panel builders flexibility. The mounting position is vertical only, so plan the DIN rail orientation accordingly. Dimensions: 193 mm height, 45 mm width, 97 mm depth. The S0 footprint is compact for a 10 A starter, but the 193 mm height means it won't fit shallow enclosures — check your backplate clearance. Clearance requirements: 50 mm above, 20 mm below, 20 mm to the side, 10 mm downward, and 0 mm backward from the mounting surface. The upstream circuit-breaker must be S00 frame size to match the feeder. ## Environmental and compliance Operating temperature range -20 to +60 °C, storage and transport -50 to +80 °C. The temperature compensation is active across the full operating range, so the overload trip curve stays accurate.","metaTitle":"Siemens 3RA2120-1JA24-0AP0 SIRIUS Direct Starter, 10 A","metaDescription":"Siemens 3RA2120-1JA24-0AP0 SIRIUS direct on-line starter, S0 size, 10 A at 480 V, Trip Class 10. Active production, quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"97 mm","Width":"45 mm","title":"3RA2120-1JA24-0AP0","Height":"193 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 7.00...10.0 A 230 V AC screw 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 DIN 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 230 V rated value":"1.5 hp","at 400 V rated value":"4 000 kW","at 480 V rated value":"10 A","at 50 Hz rated value":"230 ... 230 V","at 600 V rated value":"10 A","Design Of The Product":"for standard rail or screw mounting","For Main Current Circuit":"screw-type terminals","Temperature Compensation":"-20 ... +60 °C","at 110/120 V rated value":"0.5 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":"10 A","at AC-3e rated value maximum":"690 V","Substance Prohibitance (Date)":"10/01/2009","at AC-3e at 400 V rated value":"10 A","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","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":"130 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":"7 ... 10 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/6faa353168bc50634ade032b01b41334.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=175142&mlfb=3RA2120-1JA24-0AP0"},"ai":{"faq":[{"question":"What motor sizes does the 3RA2120-1JA24-0AP0 cover?","answer":"At 460/480 V it handles 7.5 hp, at 575/600 V it handles 10 hp, at 200/208 V it handles 3 hp, and at 230 V it handles 1.5 hp. The Trip Class 10 characteristic suits standard starting duty for pumps, fans, and compressors."},{"question":"Does the 3RA2120-1JA24-0AP0 include the contactor and overload?","answer":"Yes, it ships as a complete direct on-line starter with the 3RT2024-1AP00 contactor and the 3RA2921-1AA00 link module pre-assembled. No separate component sourcing needed."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2120-1JA24-0AP0","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/3RA2120-1JA24-0AP0 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}}