{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2018-4AG61","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2018-4AG61","canonicalUrl":"https://aoctrl.com/siemens/3RT2018-4AG61","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2018-4AG61","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT2018-4AG61 power contactor, size S00, 100 V at 50 Hz / 110 V at 60 Hz coil, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"The coil is rated at 100 V at 50 Hz and 110 V at 60 Hz, drawing 0.24 A at 50 Hz and 0.25 A at 60 Hz — a key figure for sizing the control transformer supplying the coil. The contactor carries rated operational currents at multiple voltage levels: 10 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, 3 A at 400 V, 0.2 A at 440 V, 14 A at 480 V, and 2 A at 500 V. These are the currents the main poles can make and break under specified conditions — the 14 A at 480 V figure, for instance, tells you it handles a 480 V motor load up to that current. At 230 V it is rated for 2 hp, which maps to a typical small pump or fan motor. The switching frequency varies by duty class: up to 1,000 operations per hour at AC-1 (resistive), 750 per hour at AC-2 and AC-3 (motor starting/running), and 250 per hour at AC-4 (plugging/inching). For a conveyor application running AC-3 duty, the 750 ops/h limit governs the cycle rate. The contactor has a mechanical service life of 30,000,000 operations typical — a figure that assumes proper coil voltage and load within ratings. ## Physical dimensions and auxiliary contacts The width is the critical panel-space figure — at 45 mm, it occupies one standard 45 mm-wide DIN-rail module slot. The magnet coil connection uses a ring cable lug, which means the installer needs to crimp ring terminals onto the control wiring.","metaTitle":"Siemens 3RT2018-4AG61 SIRIUS Power Contactor, S00, 100-110VA","metaDescription":"Siemens SIRIUS 3RT2018-4AG61 power contactor, size S00. Screw/snap-on 35mm DIN rail. 100V 50Hz / 110V 60Hz coil. Rated operational currents per IEC. Current lifecycle stage. Source","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"73 mm","Width":"45 mm","at AC":"4 ... 15 ms","Height":"58 mm","Upwards":"10 mm","Forwards":"10 mm","at 50 Hz":"0.24","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":"Ring cable lug connection","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","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","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":"100 V","at 500 V rated value":"2 A","at 60 Hz rated value":"110 V","at 600 V rated value":"11 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","For Main Current Circuit":"Ring cable lug connection","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-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":"ring terminal lug connection","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":"6.5 W","At Contactor For Auxiliary Contacts":"Ring cable lug connection","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","number of NO contacts for main contacts":"3","reference code according to IEC 81346-2":"Q","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 3RH29","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 NO 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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=149494&mlfb=3RT2018-4AG61","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2018-4AG61/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions for panel fit?","answer":"The contactor measures 45 mm wide, 58 mm high, and 73 mm deep. It mounts on 35 mm DIN rail and requires 10 mm clearance upwards, forwards, and downwards, plus 6 mm at the sides."},{"question":"What coil voltage does this contactor use?","answer":"The coil is rated at 100 V at 50 Hz and 110 V at 60 Hz, drawing 0.24 A at 50 Hz and 0.25 A at 60 Hz."},{"question":"What is the maximum switching frequency for motor loads?","answer":"For AC-3 duty (motor starting and running), the maximum switching frequency is 750 operations per hour. For AC-4 duty (plugging/inching), it is 250 operations per hour."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2018-4AG61","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/3RT2018-4AG61 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}}