{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2018-1AQ02","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2018-1AQ02","canonicalUrl":"https://aoctrl.com/siemens/3RT2018-1AQ02","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2018-1AQ02","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT2018-1AQ02, Size S00, 24 VDC coil, screw-type terminals, auxiliary switch, screw and snap-on mounting on 35 mm DIN rail.","salesMarkdown":"## Panel fit and switching duty Switching frequency varies by duty class: up to 1 000 cycles/hour for AC-1 resistive loads, 750 cycles/hour for AC-2 and AC-3 motor starting, and 250 cycles/hour for AC-4 plugging/reversing. That means this contactor handles high-rate conveyor cycling in AC-3, but you'll want to derate for frequent inching or reversing applications. The arcing time sits at 10...15 ms, and the opening time (at AC) is 4...15 ms — fast enough for most control schemes. A built-in auxiliary switch (20...12 range for main contacts) eliminates the need for a separate add-on block in many simple circuits. Coil termination uses screw-type terminals; the main circuit accepts solid or stranded wire from 0.5 to 4 mm², with options for dual conductors (2x 0.5...1.5 mm², 2x 0.75...2.5 mm², or 2x 4 mm²). ## Mounting flexibility and clearances These are the numbers to check when packing multiple contactors on a DIN rail; the 6 mm side clearance is tighter than many competitors, so plan your terminal block spacing accordingly.","metaTitle":"Siemens 3RT2018-1AQ02 SIRIUS Power Contactor, Size S00, 24 V","metaDescription":"Siemens 3RT2018-1AQ02 SIRIUS power contactor, Size S00, 24 VDC coil, screw terminals, auxiliary switch included. Current lifecycle. Sourced to order. Request RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Solid":"0.5 ... 4 mm²","Width":"45 mm","at AC":"4 ... 15 ms","Height":"58 mm","Upwards":"10 mm","Forwards":"10 mm","Stranded":"0.5 ... 4 mm²","at 50 Hz":"0.25","at 60 Hz":"0.25","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","at AC-1 maximum":"1 000 1/h","at AC-2 maximum":"750 1/h","at AC-3 maximum":"750 1/h","at AC-4 maximum":"250 1/h","lifecycle_stage":"current","Auxiliary Switch":"Yes","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715","at AC-3e maximum":"750 1/h","For Main Contacts":"20 ... 12","Mounting Position":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","Size Of Contactor":"S00","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²","Product Brand Name":"SIRIUS","Product Designation":"Power contactor","at 24 V rated value":"10 A","at 48 V rated value":"2 A","at 60 V rated value":"2 A","Of Contactor Typical":"30 000 000","at 110 V rated value":"1 A","at 125 V rated value":"0.9 A","at 220 V rated value":"0.3 A","at 230 V rated value":"2 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.2 A","at 480 V rated value":"14 A","at 50 Hz rated value":"380 V","at 500 V rated value":"2 A","at 60 Hz rated value":"380 V","at 600 V rated value":"11 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Auxiliary Contacts":"20 ... 12","For Main Current Circuit":"screw-type terminals","at 110/120 V rated value":"1 hp","at 200/208 V rated value":"3 hp","at 220/230 V rated value":"5 hp","at 460/480 V rated value":"10 hp","at 575/600 V rated value":"10 hp","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"6 kV","at AC-3 rated value maximum":"690 V","at AC in hot operating state":"3 W","at AC-2 at 400 V rated value":"7.5 kW","at AC-3e rated value maximum":"690 V","at AC-4 at 400 V rated value":"11.5 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"10/01/2009","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"19.4 A","at AC-5b up to 400 V rated value":"13.2 A","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 25A (690V,100kA), aM: 20A (690V,100kA), BS88: 25A (415V,80kA)","Without Load Current Share Typical":"5.7 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","With Type Of Coordination 1 Required":"gG: 50A (690V,100kA), aM: 25A (690V,100kA), BS88: 50A (415V,80kA)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"1 W","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 2x 12","number of NO contacts for main contacts":"3","reference code according to IEC 81346-2":"Q","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","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","mirror contact according to IEC 60947-4-1":"Yes","with low demand rate according to SN 31920":"40 %","with high demand rate according to SN 31920":"73 %","Type Of Voltage Of The Control Supply Voltage":"AC","Limited To 1 S Switching At Zero Current Maximum":"300 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"169 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"128 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"92 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"74 A; Use minimum cross-section acc. to AC-1 rated value","contact rating of auxiliary contacts according to UL":"A600 / Q600","Of Main Circuit With Degree Of Pollution 3 Rated Value":"690 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","Of Auxiliary Circuit With Degree Of Pollution 3 Rated Value":"690 V","For Short-Circuit Protection Of The Auxiliary Switch Required":"gG: 10 A (500 V, 1 kA)","minimum cross-section in main circuit at maximum AC-1 rated value":"4 mm²","number of NC contacts for auxiliary contacts instantaneous contact":"1","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/a59a8d07b68d9518b17d80d678e9ec6d.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=213900&mlfb=3RT2018-1AQ02","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2018-1AQ02/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for 3RT2018-1AQ02?","answer":"It is a Size S00 power contactor with a 24 VDC coil, screw-type terminals, and an integrated auxiliary switch. Switching frequency reaches 1 000 cycles/hour for AC-1, 750 cycles/hour for AC-3, and 250 cycles/hour for AC-4. Operating temperature range is -25 to +60 °C."},{"question":"Where can I buy 3RT2018-1AQ02 and how is it quoted?","answer":"This contactor is sourced through independent distribution channels. Submit an RFQ for volume pricing and availability; lead time and stock position are confirmed at quote time."},{"question":"Will 3RT2018-1AQ02 drop into a panel specified for 3RT2016-1AK22?","answer":"Both are Size S00 SIRIUS contactors on the same 45 mm DIN-rail footprint, so mechanical fit is identical — same width, same rail clip, same clearance requirements. The difference is in the coil voltage and auxiliary configuration; verify your control voltage matches the 24 VDC coil before swapping."},{"question":"What compliance documentation is available for 3RT2018-1AQ02?","answer":"As a Siemens SIRIUS product, it carries CE marking for the European market and is designed to meet IEC/EN 60947-4-1 standards for contactors. RoHS and REACH compliance documentation is provided with the shipment upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2018-1AQ02","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/3RT2018-1AQ02 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}}