{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1017-1AR21","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1017-1AR21","canonicalUrl":"https://aoctrl.com/siemens/3RT1017-1AR21","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1017-1AR21","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S00, 3RT1017-1AR21, 24 VDC coil, 5.5 kW at 400 V AC-2, screw terminals, 45 mm width, IP20 front.","salesMarkdown":"The Siemens 3RT1017-1AR21 is a SIRIUS power contactor in frame size S00 — the smallest footprint in the series, at 45 mm wide, 57.5 mm tall, and 72 mm deep. It switches motor loads up to 5.5 kW in AC-2 duty at 400 V and handles 8.5 A in AC-4 reversing or plugging service. The coil is a 24 VDC type, with a rated operating range of 0.8 to 1.1 times nominal at 50 Hz and 0.85 to 1.1 at 60 Hz. That means the coil holds in reliably down to about 19.2 VDC and up to 26.4 VDC — useful for control circuits with voltage drop on long cable runs. The screw-type main terminals accept 2x (0.5 to 1.5 mm²) solid or stranded, 2x (0.75 to 2.5 mm²), or up to 2x (0.75 to 4 mm²) — enough for the motor leads this contactor handles. AWG equivalent: 2x (20 to 16), 2x (18 to 14), or 1x 12. ## Ratings that govern the real choice The headline motor ratings are 5.5 kW at 400 V for AC-2 (slip-ring motor, start/run) and 8.5 A at 400 V for AC-4 (inching, plugging, reversing). For resistive loads (AC-12), the contactor is rated 10 A maximum. The auxiliary contact block is a single NO instantaneous contact.","metaTitle":"Siemens 3RT1017-1AR21 SIRIUS Power Contactor, S00, 24 VDC Co","metaDescription":"Siemens 3RT1017-1AR21 SIRIUS power contactor, size S00, 24 VDC coil, 5.5 kW at 400 V AC-2, screw terminals, DIN rail mount, IP20. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"72 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"45 mm","Height":"57.5 mm","Maximum":"2 000 m","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","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 ... +60 °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":"440 V","at 500 V rated value":"5.5 kW","at 60 Hz rated value":"440 V","at 690 V rated value":"5.5 kW","Instantaneous Contact":"1","Side-by-side mounting":"Yes","For Main Current Circuit":"screw-type terminals","Single Or Multi-Stranded":"2x (0,5 ... 1,5 mm²), 2x (0,75 ... 2,5 mm²), max. 2x (0,75 ... 4 mm²)","at AC-2 at 400 V rated value":"5.5 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 (20 ... 16), 2x (18 ... 14), 1x 12","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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"screw-type 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","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=112719&mlfb=3RT1017-1AR21","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1017-1AR21/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to 3RT1017-1AR21?","answer":"The 3RT1016-1AR11 is the next step down in the SIRIUS S00 frame — same 24 VDC coil, same DIN-rail footprint, but rated for a lower motor current. The 3RT1017-1AR21 drops into the same panel cutout and wiring scheme as the 3RT1016-1AR11, so upgrading or substituting within the S00 family requires no mechanical rework."},{"question":"Where can I buy 3RT1017-1AR21 and how is it quoted?","answer":"This part is sourced through independent industrial distribution channels. It is quoted to order against a formal RFQ; availability and current pricing are confirmed at the time of quotation."},{"question":"What compliance documentation does Siemens provide for 3RT1017-1AR21?","answer":"As a standard SIRIUS catalog product, this contactor carries CE marking for the European market and is designed for use in industrial control panels per IEC 60947-4-1. RoHS and REACH compliance declarations are available from Siemens on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1017-1AR21","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/3RT1017-1AR21 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}}