{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2120-4AE26-0AP0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2120-4AE26-0AP0","canonicalUrl":"https://aoctrl.com/siemens/3RA2120-4AE26-0AP0","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2120-4AE26-0AP0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2120-4AE26-0AP0 direct online motor starter, size S0, 16 A AC-3 at 400 V, Class 10, 690 V max, screw and snap-on 35 mm DIN rail, spring-loaded terminals.","salesMarkdown":"## AC-3 duty and trip class — the load-side constraints The 3RA2120-4AE26-0AP0: For a motor starting a high-inertia load (conveyor, fan), verify the acceleration time stays under that window — a longer ramp risks nuisance tripping. ## Supplied as a factory-matched assembly This starter ships with the contactor 3RT2026-2AP00 and the link module 3RA2921-2AA00 pre-assembled. The 45 mm width and 107 mm depth fit a standard 8-module enclosure row — plan for the 50 mm upward clearance and 20 mm forward clearance for cable entry and heat dissipation. ## Active production — compliance documentation on file The lifecycle stage is marked current — this is an active-production part, not a legacy or phase-out line. The operating temperature range is -20 to +60 °C with temperature compensation active across that band. Storage and transport limits extend to -50 to +80 °C, covering unheated warehouse or container transit.","metaTitle":"Siemens 3RA2120-4AE26-0AP0 SIRIUS Motor Starter, 16 A AC-3","metaDescription":"Siemens SIRIUS 3RA2120-4AE26-0AP0 direct online motor starter, 16 A AC-3 at 400 V, Class 10, 690 V max. Active production, sourced to order. RFQ for pricing.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"107 mm","Width":"45 mm","Height":"243 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","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":"2 hp","at 400 V rated value":"7 500 kW","at 480 V rated value":"16 A","at 50 Hz rated value":"230 ... 230 V","at 600 V rated value":"16 A","Design Of The Product":"for standard rail or screw mounting","For Main Current Circuit":"spring-loaded terminals","Temperature Compensation":"-20 ... +60 °C","at 110/120 V rated value":"1 hp","at 200/208 V rated value":"2 hp","at 220/230 V rated value":"5 hp","at 460/480 V rated value":"10 hp","Of The Supplied Contactor":"3RT2026-2AP00","Of The Supplied Link Module":"3RA2921-2AA00","Size Of The Circuit-Breaker":"S0","at AC-3 rated value maximum":"690 V","at AC-3 at 400 V rated value":"16 A","at AC-3e rated value maximum":"690 V","Substance Prohibitance (Date)":"10/01/2009","at AC-3e at 400 V rated value":"16 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":"3RV2021-4AA20","degree of protection NEMA rating":"other","For Auxiliary And Control Circuit":"spring-loaded terminals","Product Extension Auxiliary Switch":"Yes","Relative Humidity During Operation":"10 ... 95 %","Without Load Current Share Typical":"9.8 W","Surge Voltage Resistance Rated Value":"6 kV","at AC in hot operating state per pole":"5 W","Number Of Poles For Main Current Circuit":"3","Product Function Short Circuit Protection":"Yes","apparent holding power of magnet coil at AC":"9.8 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":"208 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":"10 ... 16 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/2cfb248f31d1355314b80005a1dcf31f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=402210&mlfb=3RA2120-4AE26-0AP0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RA2120-4AE26-0AP0/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2120-4AE26-0AP0","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/3RA2120-4AE26-0AP0 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}}