{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1066-2AF36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1066-2AF36","canonicalUrl":"https://aoctrl.com/siemens/3RT1066-2AF36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1066-2AF36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S10 power contactor, 3RT1066-2AF36, 110-127 VAC coil, spring-type terminals, screw mounting, 202 mm depth, 145 mm width, 210 mm height.","salesMarkdown":"The 3RT1066-2AF36: The S10 frame measures 210 mm high by 145 mm wide by 202 mm deep — that depth is a real constraint in shallow enclosures; plan for at least 20 mm forward clearance for arc chamber ventilation and wiring bends. Mounting is by screw fixing through two 11 mm diameter holes, with the contactor rotatable ±90° on a vertical surface and tiltable ±22.5° front-to-back, so it adapts to tight gland-plate layouts without custom brackets. Minimum air gaps around the body: 10 mm above, 10 mm below, and 10 mm to the side. That's tighter than many S10-class contactors — if you're shoehorning this alongside other devices, measure the free space, not just the footprint. Coil termination uses spring-type terminals accepting 2x (0.25 to 2.5 mm²) solid or stranded wire — no screw torque to verify, but verify the ferrule strip length matches the cage depth. The pickup threshold is 0.8 x rated voltage (88 V minimum at the 110 V end), and the coil holds at 1.1 x rated value; dropout below that 0.8 threshold is typical for AC-operated contactors. ## Switching capacity and duty-cycle limits The contactor's maximum switching rates define its real-world application: 750 operations per hour in AC-1 (resistive loads), 500/h in AC-3 (standard squirrel-cage motors), and 130/h in AC-4 (plugging/inching duty). These are standard for an S10 frame — no surprises for selectivity coordination with upstream breakers, but the arcing time matters if you're sizing suppression networks across the coil. ## Auxiliary contact ratings and thermal limits The contactor ships with an auxiliary switch block. Its rated breaking capacities: 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, and 1 A at 110 V — these are the DC resistive ratings for the aux contacts; inductive loads need derating. Power factor correction is rated at 0.9 for both 50 Hz and 60 Hz supplies — the contactor's coil draw is consistent across line frequencies, so no re-rating needed if the site runs 60 Hz.","metaTitle":"Siemens 3RT1066-2AF36 SIRIUS Power Contactor, S10, 110-127VA","metaDescription":"Siemens SIRIUS 3RT1066-2AF36 power contactor, size S10. 110-127 VAC coil, spring-type terminals, screw fixing. Current production. Quoted to order.","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":"3RT1066-2AF36","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: 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":"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":"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/a6cebcc9163d7c7856bee67e3bf4d371.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=375620&mlfb=3RT1066-2AF36"},"ai":{"faq":[{"question":"What is the closest functional second-source for 3RT1066-2AF36 — for example, 3RT1266-6AP36-0KA1?","answer":"The 3RT1266-6AP36-0KA1 is a different variant within the SIRIUS family — it carries a different coil voltage and may have different terminal configurations. The 3RT1066-2AF36 is a screw-mounted, spring-coil-terminal S10 contactor with a 110-127 VAC coil. A direct drop-in replacement without rewiring would need to match the S10 frame, coil voltage, and mounting pattern exactly; the 3RT1266 series uses a different coil system and is not a form-fit-function equivalent without re-termination."},{"question":"What is the depth of 3RT1066-2AF36?","answer":"The depth is 202 mm. This is the body depth excluding terminals; add at least 20 mm forward clearance for wiring and arc chamber ventilation."},{"question":"What wire sizes does the main power circuit accept?","answer":"The main power terminals accept stranded cable from 70 to 240 mm². The control/coil terminals accept 2x (0.25 to 2.5 mm²) solid or stranded wire via spring-type terminals."},{"question":"Where can I buy 3RT1066-2AF36?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1066-2AF36","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/3RT1066-2AF36 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}}