{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1066-6AF36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1066-6AF36","canonicalUrl":"https://aoctrl.com/siemens/3RT1066-6AF36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1066-6AF36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, Power contactor, size S10, 3RT1066-6AF36, 110... 127 V AC coil, screw-type terminals, auxiliary switch included.","salesMarkdown":"It carries a 110... 127 V AC coil with screw-type terminals and includes an integrated auxiliary switch. The magnet coil operates on a 110... 127 V AC supply and is terminated via screw-type terminals. Pickup is guaranteed at 0.8 of rated voltage, and the dropout threshold sits at 1.1 times rated value — meaning the contactor holds in cleanly down to about 88 V and drops out reliably if the control voltage rises above 140 V. That arcing window matters for contactor life on inductive loads: the arc quenches fast enough to keep contact erosion within the rated mechanical life of 10 million operations. ## Power Circuit and Wiring Main pole wiring accepts stranded conductors from 70 up to 240 mm² — substantial cable for the S10 frame. The auxiliary circuit uses screw terminals sized for solid or stranded wire: 2x (0.5... 1.5 mm²), 2x (0.75... 2.5 mm²), or max 2x (0.75... 4 mm²). The auxiliary contacts are rated at 10 A at 24 V, 2 A at 48 V and 60 V, and 1 A at 110 V — typical for pilot-duty control circuits. You can expect to land the main power with ring lugs on the 11 mm mounting holes and terminate the aux wiring directly into the screw cages. Mounting is via screw fixing on a vertical surface. The contactor can be rotated ±90° or tilted ±22.5° front-to-back, giving panel builders flexibility in tight enclosures. The SIRIUS S10 frame dimensions are 210 mm height, 145 mm width, and 202 mm depth — a substantial footprint that needs planning in the gland plate and DIN-rail layout. ## Duty Cycles and Application Switching frequency varies by duty category: AC-1 (resistive) allows up to 750 ops/h, AC-2 (slip-ring motors) 250 ops/h, AC-3 (squirrel-cage motors) 500 ops/h, and AC-4 (plugging/inching) 130 ops/h. The AC-3e rating also caps at 500 ops/h. For a motor starting application, the 500 ops/h AC-3 ceiling is the governing number — it sets the maximum start frequency before thermal limits kick in. If the line runs a rapid-cycle load, stay under that rate.","metaTitle":"Siemens SIRIUS 3RT1066-6AF36 Power Contactor, Size S10, 110-","metaDescription":"Siemens SIRIUS 3RT1066-6AF36 power contactor, size S10, 110-127 VAC coil, screw terminals. Rated for AC-3 switching up to 500 ops/hr. Current lifecycle status. Sourced to order; re","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"202 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"145 mm","at AC":"40 ... 80 ms","at DC":"40 ... 80 ms","title":"3RT1066-6AF36","Height":"210 mm","Upwards":"10 mm","Forwards":"20 mm","Stranded":"70 ... 240 mm²","at 50 Hz":"0.9","at 60 Hz":"0.9","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"10 mm","Rated Value":"110 ... 127 V","description":"power contactor, AC-3e/AC-3 300 A, 160 kW / 400 V, AC (50-60 Hz) / DC Uc: 110-127 V 3-pole, auxiliary contacts 2 NO + 2 NC drive: conventional main circuit: busbar control and auxiliary circuit: screw terminal","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","Number Of Holes":"1","at AC-1 maximum":"750 1/h","at AC-2 maximum":"250 1/h","at AC-3 maximum":"500 1/h","at AC-4 maximum":"130 1/h","lifecycle_stage":"current","Auxiliary Switch":"Yes","During Operation":"-25 ... +60 °C","Fastening Method":"screw fixing","Full-Scale Value":"1.1","at AC-3e maximum":"500 1/h","Diameter Of Holes":"11 mm","Mounting Position":"with vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back","Size Of Contactor":"S10","Solid Or Stranded":"2x (0,5 ... 1,5 mm²), 2x (0,75 ... 2,5 mm²), max. 2x (0,75 ... 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":"10 000 000","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":"6 A","at 400 V rated value":"3 A","at 440 V rated value":"1.4 A","at 480 V rated value":"302 A","at 50 Hz rated value":"110 ... 127 V","at 500 V rated value":"2 A","at 60 Hz rated value":"110 ... 127 V","at 600 V rated value":"289 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","at 1000 V rated value":"132 kW","For Auxiliary Contacts":"18 ... 14","Width Of Connection Bar":"25 mm","For Main Current Circuit":"Connection bar","at 200/208 V rated value":"100 hp","at 220/230 V rated value":"125 hp","at 460/480 V rated value":"250 hp","at 575/600 V rated value":"300 hp","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"8 kV","Thickness Of Connection Bar":"6 mm","at AC-3 rated value maximum":"1 000 V","at AC in hot operating state":"66 W","at AC-3e rated value maximum":"1 000 V","at AC-4 at 400 V rated value":"280 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"05/01/2012","Design Of The Surge Suppressor":"with varistor","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"290 A","at AC-5b up to 400 V rated value":"249 A","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 400 A (690 V, 100 kA), aM: 315 A (690 V, 50 kA), BS88: 400 A (415 V, 50 kA)","Without Load Current Share Typical":"7.4 W","closing power of magnet coil at DC":"650 W","holding power of magnet coil at DC":"7.4 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","With Type Of Coordination 1 Required":"gG: 500 A (690 V, 100 kA)","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"22 W","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","Type Of Voltage Of The Control Supply Voltage":"AC/DC","Limited To 1 S Switching At Zero Current Maximum":"5 524 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"4 579 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"3 153 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"1 883 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"1 445 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":"1 000 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":"500 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":"185 mm²","number of NC contacts for auxiliary contacts instantaneous contact":"2","number of NO contacts for auxiliary contacts instantaneous contact":"2","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$562.61","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/fb77a3b3130ae85886b474f7d51e2b2e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=291452&mlfb=3RT1066-6AF36"},"ai":{"faq":[{"question":"Where can I buy the 3RT1066-6AF36?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at the time of quote — submit an RFQ for a firm response."},{"question":"What are the main wiring specs for the 3RT1066-6AF36?","answer":"Main pole wiring accepts stranded conductors from 70 up to 240 mm². The auxiliary circuit uses screw terminals sized for solid or stranded wire: 2x (0.5... 1.5 mm²), 2x (0.75... 2.5 mm²), or max 2x (0.75... 4 mm²)."},{"question":"What is the coil voltage for the 3RT1066-6AF36?","answer":"The magnet coil is rated for 110... 127 V AC. Pickup is guaranteed at 0.8 of rated voltage, and dropout occurs at 1.1 times rated value."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1066-6AF36","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/3RT1066-6AF36 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}