{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1016-2AX21-0AA3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1016-2AX21-0AA3","canonicalUrl":"https://aoctrl.com/siemens/3RT1016-2AX21-0AA3","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1016-2AX21-0AA3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1016-2AX21-0AA3 power contactor, size S00, 4 kW at AC-2 400 V, spring-loaded terminals, screw and snap-on 35 mm DIN rail mounting.","salesMarkdown":"The Siemens SIRIUS 3RT1016-2AX21-0AA3 is a size S00 power contactor rated for 4 kW at AC-2 duty on 400 V, meaning it handles moderate motor loads like conveyors and pumps where starting current is controlled. For inching or plugging duty (AC-4), it carries 8.5 A at 400 V — a real constraint if your application cycles the motor under load. Spring-loaded terminals accept 2x (0.25... 2.5 mm²) solid or stranded wire, or 2x (24... 14) AWG. For type 2 coordination (contactor remains operational after a fault), step down to a gL/gG 20 A fuse. This distinction matters when you're specifying a panel that must survive a short circuit without a service call. ## Integration notes The contactor measures 45 mm wide, 60 mm tall, and 73 mm deep — a compact S00 footprint that fits tightly packed DIN-rail enclosures. The IP20 finger-safe front and terminal covers protect against accidental contact in open panels.","metaTitle":"Siemens 3RT1016-2AX21-0AA3 SIRIUS Power Contactor, S00, 4 kW","metaDescription":"Siemens SIRIUS 3RT1016-2AX21-0AA3 power contactor, size S00. Rated 4 kW at AC-2 400 V, 8.5 A at AC-4. Spring-loaded terminals, DIN rail mount. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"60 mm","Maximum":"2 000 m","at 50 Hz":"0.8 ... 0.98","at 60 Hz":"0.97 ... 1.18","At The Side":"6 mm","On The Front":"IP20","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","Mounting type":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Of The Terminal":"IP20","lifecycle_stage":"current","During Operation":"-25 ... +40 °C","Size of contactor":"S00","Product brand name":"SIRIUS","Degree of pollution":"3","Product designation":"power contactor","at 24 V rated value":"10 A","at 60 V rated value":"2 A","Of Contactor Typical":"30 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.3 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 50 Hz rated value":"27 V","at 500 V rated value":"4.5 kW","at 60 Hz rated value":"27 V","at 690 V rated value":"5.5 kW","Instantaneous Contact":"1","Side-by-side mounting":"Yes","For Main Current Circuit":"spring-loaded terminals","Single Or Multi-Stranded":"2x (0,25 ... 2,5 mm²)","at AC-2 at 400 V rated value":"4 kW","at AC-4 at 400 V rated value":"8.5 A","Operating current at AC-12 maximum":"10 A","With Type Of Assignment 2 Required":"fuse gL/gG: 20 A","at AWG conductors for main contacts":"2x (24 ... 14)","With Type Of Coordination 1 Required":"fuse gL/gG: 35 A","Reference code acc. to DIN EN 81346-2":"Q","Number of NC contacts for main contacts":"0","Number of NO contacts for main contacts":"3","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (24 ... 14)","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"spring-loaded terminals","at ambient temperature 40 °C rated value":"22 A","Apparent holding power of magnet coil at AC":"4.4 V·A","Apparent pick-up power of magnet coil at AC":"27 V·A","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Type of voltage of the control supply voltage":"AC","Inductive power factor with closing power of the coil":"0.8","Inductive power factor with the holding power of the coil":"0.27","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","Of The Contactor With Added Electronics-Compatible Auxiliary Switch Block Typical":"5 000 000"}},"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=386737&mlfb=3RT1016-2AX21-0AA3","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1016-2AX21-0AA3/alternatives.json"},"ai":{"faq":[{"question":"What are the key motor ratings for this contactor?","answer":"At AC-2 duty on 400 V, it is rated for 4 kW motor loads. For AC-4 (inching/plugging) at 400 V, the rated operational current is 8.5 A. These are the two main ratings that govern motor switching fit."},{"question":"Does this contactor use screw terminals or spring-loaded?","answer":"The main current circuit uses spring-loaded terminals, accepting 2x (0.25 to 2.5 mm²) solid or stranded wire, or 2x (24 to 14) AWG. No screw clamping — just strip and push."},{"question":"What fuse coordination does this contactor require?","answer":"For type 1 coordination, use a gL/gG 35 A fuse upstream. For type 2 coordination (contactor remains functional after a fault), use a gL/gG 20 A fuse."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1016-2AX21-0AA3","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/3RT1016-2AX21-0AA3 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}}