{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1066-2AD36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1066-2AD36","canonicalUrl":"https://aoctrl.com/siemens/3RT1066-2AD36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1066-2AD36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1066-2AD36 power contactor, S10 frame size, 202 mm depth, 145 mm width, 210 mm height, screw fixing, spring-type coil terminals.","salesMarkdown":"## S10 Frame, 202 mm Depth — Panel Fit Reality The 3RT1066-2AD36 is a SIRIUS power contactor in the S10 frame size, measuring 202 mm deep by 145 mm wide by 210 mm tall. Mounting is via screw fixing through an 11 mm hole — not DIN rail, so plan for a drilled backplate or adapter plate if the existing panel uses a rail footprint. Clearance requirements are tight: 10 mm upwards and downwards, 20 mm forwards, and 10 mm at the side. That forward clearance is the one that catches people — the arcing space plus the spring-type terminal access needs that 20 mm, not the 10 mm you might budget from the side gaps. ## Duty-Cycle Ceilings — AC-3 vs AC-4 Reality The rated switching frequency depends entirely on the duty class. In AC-3 (motor starting, breaking during run) it manages 500 operations per hour — the same ceiling applies for AC-3e. AC-1 (resistive loads) allows 750 ops/h, AC-2 (slip-ring motors) drops to 250, and AC-4 (plugging, inching) is the bottleneck at 130 ops/h. If your application cycles faster than that, the contactor will overheat the arc chamber. Mechanical life is rated at 10 million operations typical — that's the contactor body itself, not the contacts. Electrical life will be lower and depends on the switching current and duty class; the AC-4 figure of 130 ops/h is a strong hint that heavy inching duty wears the contacts fast. ## Coil and Terminal Wiring — Spring-Type on the Coil, Screw on the Power The magnet coil uses spring-type terminals — push-in or screwdriver-actuated, accepting 2x (0.25 to 2.5 mm²) solid or stranded. The main power circuit uses screw terminals sized for 70 to 240 mm² stranded cable. That's a heavy lug — the 11 mm mounting hole matches the bolt-down bus bar approach for the power side. Coil voltage is 42-48 V AC/DC with a pickup threshold of 0.8× rated and a dropout of 0.9× at 50/60 Hz. The operate time is 40-80 ms AC or DC, with an arcing time of 10-15 ms. That's consistent for a contactor this size — the coil dropout margin is tight, so if your control voltage sags below 38 V at 48 V nominal, the contactor drops out. ## Auxiliary Contact Ratings and Ambient Limits An auxiliary switch is built in — rated 10 A at 24 V, 2 A at 48 V or 60 V, and 1 A at 110 V. These are the thermal current ratings for the auxiliary contacts; they derate with voltage and inductive loads. If you need more auxiliary poles, the S10 frame accepts add-on blocks, but this base unit carries one set. Operating temperature range is -25 to +60 °C, storage from -55 to +80 °C. The mounting position allows vertical surface with ±90° rotation and ±22.5° tilt front-to-back — useful for tight enclosures where the contactor must sit at an angle.","metaTitle":"Siemens 3RT1066-2AD36 SIRIUS Power Contactor, S10, 202 mm","metaDescription":"Siemens 3RT1066-2AD36 SIRIUS power contactor, S10 frame, 202 mm depth. AC-3 switching up to 500 ops/h. Screw fixing, spring-type coil terminals.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"202 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"145 mm","at AC":"40 ... 80 ms","at DC":"40 ... 80 ms","title":"3RT1066-2AD36","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":"42 ... 48 V","description":"power contactor, AC-3e/AC-3 300 A, 160 kW / 400 V, AC (50-60 Hz) / DC Uc: 42-48 V 3-pole, auxiliary contacts 2 NO + 2 NC drive: conventional main circuit: busbar control and auxiliary circuit: spring-loaded terminal","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Spring-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 (0,25 ... 2,5 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":"42 ... 48 V","at 500 V rated value":"2 A","at 60 Hz rated value":"42 ... 48 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":"24 ... 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":"spring-loaded 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":"Spring-type terminals","With Type Of Coordination 1 Required":"gG: 500 A (690 V, 100 kA)","at AWG cables for auxiliary contacts":"2x (24 ... 14)","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 (0.25 ... 1.5 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","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/1f9ad6ad4910f59c3bf9ecf9e8b525f4.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=145144&mlfb=3RT1066-2AD36"},"ai":{"faq":[{"question":"What is the 3RT1066-2AD36's mounting method — does it snap onto DIN rail?","answer":"No, it uses screw fixing through an 11 mm hole. The mounting surface must be drilled; there is no DIN-rail clip on this S10 frame contactor. Plan for a backplate or adapter if the existing panel uses a rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1066-2AD36","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/3RT1066-2AD36 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}}