{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2018-1AU61","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2018-1AU61","canonicalUrl":"https://aoctrl.com/siemens/3RT2018-1AU61","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2018-1AU61","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT2018-1AU61, Size S00, 45 mm width, 73 mm depth, screw-type terminals, 35 mm DIN rail snap-on mounting.","salesMarkdown":"## Termination and wiring The 3RT2018-1AU61: The magnet coil uses screw-type terminals — confirm the screwdriver bit size for the terminal torque spec before final torquing. ## Duty cycle and mechanical endurance Rated for 30,000,000 mechanical operations typical — this is the unloaded mechanical life. The switching rate limits per duty class: 1,000 cycles/h at AC-1, 750 cycles/h at AC-2, AC-3, and AC-3e, and 250 cycles/h at AC-4. The arcing time at AC is 4…15 ms. The auxiliary contact ratings span from 10 A at 24 V down to 0.2 A at 440 V — verify the load voltage and current against the switching curve for the specific control circuit, particularly at higher voltages where the make/break capacity drops. The thermal envelope suits most indoor panel environments without special derating.","metaTitle":"Siemens 3RT2018-1AU61 SIRIUS Power Contactor, Size S00","metaDescription":"Siemens 3RT2018-1AU61 SIRIUS power contactor, Size S00, 45 mm width, 73 mm depth, screw terminals, 35 mm DIN rail mount. Active production. Quoted to order.","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","title":"3RT2018-1AU61","Height":"58 mm","Upwards":"10 mm","Forwards":"10 mm","Stranded":"0.5 ... 4 mm²","at 60 Hz":"0.25","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"6 mm","description":"power contactor, AC-3e/AC-3, 16 A, 7.5 kW / 400 V, 3-pole, 277 V AC, 60 Hz, auxiliary contacts: 1 NO, screw terminal, size: S00","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 500 V rated value":"2 A","at 60 Hz rated value":"277 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":"6.5 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 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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/9aaedeb53c85558107b9d84638806d05.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=525991&mlfb=3RT2018-1AU61"},"ai":{"faq":[{"question":"What is the depth of the 3RT2018-1AU61 contactor?","answer":"The depth is 73 mm from the DIN rail mounting surface to the front of the housing. This is the critical dimension for enclosure depth selection."},{"question":"What wire sizes does the 3RT2018-1AU61 accept?","answer":"Solid or stranded wire from 0.5 mm² to 4 mm² (20…12 AWG). Two conductors per terminal are allowed for the main contacts."},{"question":"What is the mechanical life expectancy of this contactor?","answer":"30,000,000 mechanical operations typical. The electrical life depends on the switching duty class and load current."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2018-1AU61","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/3RT2018-1AU61 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}