{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1266-6AU36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1266-6AU36","canonicalUrl":"https://aoctrl.com/siemens/3RT1266-6AU36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1266-6AU36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS vacuum contactor, Size S10, 3RT1266-6AU36, 240-277 V AC coil, screw-type terminals, rated 10 A at 24 V, current lifecycle.","salesMarkdown":"## SIRIUS Vacuum Contactor, Size S10 The Siemens 3RT1266-6AU36 is a SIRIUS vacuum contactor in the Size S10 frame. The sealed vacuum chamber extinguishes the arc in 10-15 ms with no contact erosion. The 240-277 V AC coil pulls in at 80% of rated voltage and operates across 40-80 ms on both AC and DC. Mounting is by screw fixing with a single 11 mm hole. The contactor accepts stranded cable from 70 to 240 mm² on the main power path, and solid or stranded control wiring in sizes from 0.5 to 4 mm². The auxiliary switch is present and the coil connection uses screw-type terminals. ## Ratings & Fit The auxiliary contact ratings define the signal-level switching capability: 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, and 1 A at 110 V. These are the maximum continuous currents the auxiliary contacts can break — important when driving PLC inputs, relay coils, or indicator lamps in the control circuit. The main power contacts are rated for the Size S10 frame; the 70-240 mm² stranded cable range indicates a contactor sized for motor loads in the 100-200 A range, typical for large pumps, compressors, or conveyors on 400 V three-phase systems. Dimensions: 210 mm height, 145 mm width, 206 mm depth. The depth of 206 mm is the dimension from the mounting surface to the furthest projection — critical for enclosure depth planning, especially when a panel door or busbar system is close behind the mounting plate.","metaTitle":"Siemens 3RT1266-6AU36 SIRIUS Vacuum Contactor, Size S10, 240","metaDescription":"Siemens 3RT1266-6AU36 SIRIUS vacuum contactor, Size S10, 240-277 V AC coil, 10 A at 24 V rated value. Current lifecycle. 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":"3RT1266-6AU36","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":"240 ... 277 V","description":"vacuum contactor AC-3e/AC-3 300 A, 160 kW / 400 V, 3-pole, Uc: 240-277 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":"240 ... 277 V","at 500 V rated value":"2 A","at 60 Hz rated value":"240 ... 277 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/4726b02525a5120256d8de22ac957465.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=160866&mlfb=3RT1266-6AU36"},"ai":{"faq":[{"question":"What is 3RT1266-6AU36's listed depth?","answer":"The depth is 206 mm, measured from the mounting surface to the furthest projection. This is the key dimension for enclosure clearance behind the mounting plate."},{"question":"What conductor sizes does 3RT1266-6AU36 accept?","answer":"Main power connections accept stranded cable from 70 to 240 mm². Control wiring accepts solid or stranded conductors: 2x (0.5-1.5 mm²), 2x (0.75-2.5 mm²), or max 2x (0.75-4 mm²)."},{"question":"What compliance documentation does Siemens provide for 3RT1266-6AU36?","answer":"As a current-production Siemens SIRIUS component, this contactor is manufactured to comply with relevant IEC/EN standards for industrial control equipment. Specific RoHS, REACH, and UL documentation should be available from Siemens upon request or via their technical documentation portal. The evidence does not list specific certification numbers."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1266-6AU36","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/3RT1266-6AU36 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}}