{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2120-1FA24-0AK6","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2120-1FA24-0AK6","canonicalUrl":"https://aoctrl.com/siemens/3RA2120-1FA24-0AK6","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2120-1FA24-0AK6","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2120-1FA24-0AK6 non-fused load feeder, direct starter, S0 size, CLASS 10, 690 V AC-3 max, screw and snap-on 35 mm DIN rail.","salesMarkdown":"The 3RA2120-1FA24-0AK6 is a Siemens SIRIUS non-fused load feeder — a factory-assembled direct starter combining a contactor and a circuit-breaker in one S0-size package. It ships with the 3RT2024-1AK60 contactor and the 3RA2921-1AA00 link module already integrated, so it arrives as a single unit ready for DIN-rail mounting. Rated for AC-3 duty up to 690 V, it delivers 1 500 W at 400 V and 3 000 W at 690 V, with corresponding current draws of 4.8 A at 480 V and 4.55 A at 600 V. ## Panel integration and mounting constraints Mounts vertically on 35 mm standard DIN rail via screw and snap-on fastening. The envelope is 45 mm wide, 193.1 mm high, and 97.1 mm deep — the S0 footprint fits alongside other S0 components in a structured panel layout. Clearance distances: 30 mm upwards, 10 mm forwards, 10 mm downwards, 9 mm at the side, and 0 mm backwards. These are the minimum air gaps to adjacent metalwork or enclosures for heat dissipation and arc containment — respect them in the panel layout to keep the unit within its thermal envelope. The pollution degree is 3 (conductive pollution or dry non-conductive pollution that becomes conductive due to condensation), which is standard for industrial control panels without sealed enclosures. ## Environmental limits and operating range Operates from -20 to +60 °C ambient; storage and transport range is -50 to +80 °C. The 60 °C ceiling is the limiting factor for panel internal temperature — if the enclosure ambient exceeds that, derating or forced ventilation is needed.","metaTitle":"Siemens 3RA2120-1FA24-0AK6 SIRIUS Motor Starter, S0","metaDescription":"Siemens 3RA2120-1FA24-0AK6 SIRIUS non-fused load feeder, S0 size, CLASS 10 trip, 690 V max. Active production, sourced to order. Request a quote.","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":"-50 ... +80 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail","Mounting Position":"vertical","Product Brand Name":"SIRIUS","Type Of Assignment":"2","Degree Of Pollution":"3","Product Designation":"non-fused load feeders 3RA2","Size Of Load Feeder":"S0","at 230 V rated value":"0.5 hp","at 400 V rated value":"1 500 W","at 480 V rated value":"4.8 A","at 50 Hz rated value":"110 V","at 500 V rated value":"2 200 W","at 60 Hz rated value":"120 V","at 600 V rated value":"4.55 A","at 690 V rated value":"3 000 W","Design Of The Product":"direct starter","at 110/120 V rated value":"0.17 hp","at 200/208 V rated value":"1 hp","at 220/230 V rated value":"1 hp","at 460/480 V rated value":"3 hp","at 575/600 V rated value":"3 hp","Of The Supplied Contactor":"3RT2024-1AK60","For Main Contacts Stranded":"1 ... 10 mm², 2x (2.5 ... 6 mm²)","Of The Supplied Link Module":"3RA2921-1AA00","Size Of The Circuit-Breaker":"S0","at AC-3 rated value maximum":"690 V","Substance Prohibitance (Date)":"10/01/2009","Design Of The Overload Release":"thermal (bimetallic)","Design Of The Switching Contact":"electromechanical","Operating Frequency Rated Value":"50 ... 60 Hz","at AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 8)","Design Of The Short-Circuit Trip":"magnetic","Of The Supplied Circuit-Breakers":"3RV2021-1FA10","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":"8.5 VA","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","at 500 V according to IEC 60947-4-1 rated value":"100 000 A","at 690 V according to IEC 60947-4-1 rated value":"4 000 A","operational current at AC-3 at 400 V rated value":"3.6 A","Type Of Electrical Connection For Main Current Circuit":"screw-type terminals","Mechanical Service Life (Switching Cycles) Of Contactor Typical":"10 000 000","Response Value Current Of Instantaneous Short-Circuit Trip Unit":"65 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":"3.5 ... 5 A","Connectable Conductor Cross-Section For Main Contacts Finely Stranded With Core End Processing":"1 ... 6 mm²"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$59.07","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/514eabcd170764fc67d2a9c240d2bc5a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=470141&mlfb=3RA2120-1FA24-0AK6","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA2120-1FA24-0AK6/alternatives.json"},"ai":{"faq":[{"question":"What are the key power ratings at common voltages?","answer":"At 400 V it delivers 1 500 W; at 690 V it delivers 3 000 W. The maximum operating voltage is 690 V AC-3."},{"question":"What clearance distances are needed around this unit in a panel?","answer":"Minimum clearances: 30 mm above, 10 mm in front, 10 mm below, 9 mm at the sides, and 0 mm behind. These ensure adequate airflow and arc-flash containment per the manufacturer's installation guidelines."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2120-1FA24-0AK6","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/3RA2120-1FA24-0AK6 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}}