{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1266-6AV36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1266-6AV36","canonicalUrl":"https://aoctrl.com/siemens/3RT1266-6AV36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1266-6AV36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS vacuum contactor, size S10, order code 3RT1266-6AV36, 380-420 V AC coil, screw-type terminals, 206 mm depth.","salesMarkdown":"The vacuum arc-quenching technology means the contacts wear slowly even under heavy inductive loads, making it a fit for applications like compressor or pump cycling where mechanical life is the limiting factor. The contactor occupies a 210 mm height, 145 mm width, and 206 mm depth footprint, and mounts via screw fixing on a vertical surface with ±22.5° rotation tolerance. The S10 frame is a common size in the SIRIUS line, so panel cutouts and busbar layouts designed for other S10 contactors will accept this unit without mechanical rework. The coil is rated 380–420 V AC, with a pickup range of 0.8 to 1.1 times rated voltage. That means the coil will reliably pull in at 304 V and must not see sustained overvoltage above 462 V. The main pole conductors accept stranded cable from 70 to 240 mm², so this contactor can handle the full current range of the S10 frame without needing adapter lugs. Auxiliary contact wiring accepts 2x 0.5–1.5 mm² solid or 2x 0.75–2.5 mm² stranded, max 2x 4 mm² — standard for control circuit terminations. Clearance distances are specified: 10 mm upwards, downwards, and sideways; 20 mm forwards. These are the minimum air gaps required around the arc chamber to prevent phase-to-phase flashover during the 10–15 ms arcing time. If your enclosure is tight, verify these clearances are met before committing the panel layout. ## Switching Frequency and Lifecycle Planning The electrical switching frequency depends on duty class: AC-1 and AC-3 allow up to 750 operations per hour, while AC-2 and AC-4 are limited to 250 per hour. AC-3e, the energy-efficient motor switching class, also permits 750 per hour. The auxiliary switch is rated for 10 A at 24 V, 2 A at 48 V and 60 V, and 1 A at 110 V. These are the make/break capacities for the control circuit — useful when sizing the PLC output or relay that drives the auxiliary load. The mounting position allows ±22.5° tilt on a vertical surface and horizontal mounting (standing orientation). The power factor at 50/60 Hz is 0.9, which is the load-side power factor the contactor is designed to switch — relevant when coordinating with upstream overcurrent protection.","metaTitle":"Siemens 3RT1266-6AV36 SIRIUS Vacuum Contactor, S10 Frame","metaDescription":"Siemens 3RT1266-6AV36 SIRIUS vacuum contactor, S10 frame, 380-420 V AC coil, screw terminals. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"206 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":"3RT1266-6AV36","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":"380 ... 420 V","description":"vacuum contactor AC-3e/AC-3 300 A, 160 kW / 400 V, 3-pole, Uc: 380-420 V AC(50-60 Hz) / DC drive: conventional auxiliary contacts 2 NO + 2 NC 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":"750 1/h","at AC-4 maximum":"250 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":"750 1/h","Diameter Of Holes":"11 mm","Mounting Position":"+/-22,5° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface; standing, on horizontal mounting surface","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":"Vacuum 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 480 V rated value":"302 A","at 50 Hz rated value":"380 ... 420 V","at 500 V rated value":"2 A","at 60 Hz rated value":"380 ... 420 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":"400 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":"42 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","at AWG cables for main contacts":"2/0 ... 500 kcmil","Of Auxiliary Circuit Rated Value":"6 kV","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 500 A (690 V, 100 kA), aM: 400 A (690 V, 50 kA), BS88: 450 A (415 V, 50 kA)","Without Load Current Share Typical":"8.2 W","closing power of magnet coil at DC":"700 W","holding power of magnet coil at DC":"8.2 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":"14 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","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/7edc7e6d5ad0c4e14d8c49db42111569.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=189250&mlfb=3RT1266-6AV36"},"ai":{"faq":[{"question":"Will the 3RT1266-6AV36 drop into a panel designed for the 3RT1076-6AV36?","answer":"Both are S10 frame contactors with the same mounting footprint (screw fixing, same height/width/depth), so the 3RT1266-6AV36 will mechanically fit a panel cutout designed for the 3RT1076-6AV36. Verify the coil voltage and auxiliary contact configuration match your control circuit before swapping."},{"question":"What are the key dimensions for panel layout?","answer":"Height 210 mm, width 145 mm, depth 206 mm. Required clearances: 10 mm upwards, downwards, and sideways; 20 mm forwards from the front face."},{"question":"What wire sizes does the contactor accept?","answer":"Main poles accept stranded cable 70–240 mm². Auxiliary terminals accept 2x 0.5–1.5 mm² solid or 2x 0.75–2.5 mm² stranded, max 2x 4 mm²."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1266-6AV36","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/3RT1266-6AV36 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}}