{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1266-6AD36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1266-6AD36","canonicalUrl":"https://aoctrl.com/siemens/3RT1266-6AD36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1266-6AD36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS vacuum contactor, Size S10, order code 3RT1266-6AD36, 42-48 V coil, screw-type terminals, 70-240 mm² stranded cable range.","salesMarkdown":"The coil pulls in on a 42-48 V supply; expect operate times of 40-80 ms on both AC and DC, with an arcing time of 10-15 ms per break. That vacuum arc-quenching means the contactor handles the high inrush of motor starting without the contact erosion you'd see on a standard air-break contactor of similar frame size — useful for frequent starts or harsh environments where contact maintenance is a pain. The Size S10 frame accepts stranded power cables from 70 up to 240 mm², so it's sized for high-current motor feeders or transformer primaries — not a small panel-mount relay. The coil termination is screw-type, which is standard for this class; the auxiliary switch block is included, with contacts rated 10 A at 24 V, 2 A at 48 V, 2 A at 60 V, and 1 A at 110 V — enough for PLC inputs or pilot lights on the same control voltage. Switching frequency varies by duty: 750 cycles/hour in AC-1 (resistive) or AC-3 (squirrel-cage motor start/run), dropping to 250 cycles/hour in AC-2 (slip-ring motor) or AC-4 (plugging/inching). If your application needs frequent jogging, that AC-4 limit is the one that governs real life — not the higher AC-3 number. ## Mounting and environment — panel integration notes Mounting is screw-fixing through a single 11 mm hole, not DIN-rail snap-on, so plan for a drilled backplate or mounting channel.","metaTitle":"Siemens 3RT1266-6AD36 SIRIUS Vacuum Contactor, Size S10, 42-","metaDescription":"Siemens 3RT1266-6AD36 SIRIUS vacuum contactor, Size S10. 42-48 V coil, screw terminals, 70-240 mm² cable range. Current lifecycle stage. Sourced to order.","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":"3RT1266-6AD36","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":"vacuum contactor AC-3e/AC-3 300 A, 160 kW / 400 V, 3-pole, Uc: 42-48 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":"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":"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/e66f637a815d40244a7927c7db784a02.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=319772&mlfb=3RT1266-6AD36"},"ai":{"faq":[{"question":"Where can I buy 3RT1266-6AD36 and what is the lead time?","answer":"This part is sourced and quoted to order through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm lead-time and price."},{"question":"What is the closest functional second-source for 3RT1266-6AD36?","answer":"Within the SIRIUS family, another Size S10 vacuum contactor with the same 42-48 V coil voltage is the direct equivalent. The 3RT1264-6AP36-0KA1 is a different frame size and coil voltage — it will not drop in without panel modifications."},{"question":"What is the depth of 3RT1266-6AD36?","answer":"The depth is 206 mm, measured from the mounting surface to the furthest projection of the contactor body."},{"question":"What compliance documentation does Siemens provide for 3RT1266-6AD36?","answer":"As a current SIRIUS catalog item, Siemens provides the standard declaration of conformity (CE), RoHS and REACH compliance statements, and the product datasheet. UL and CSA file numbers are typically listed on the nameplate and in the technical documentation — verify the specific file number against your panel's listing requirements."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1266-6AD36","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/3RT1266-6AD36 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}}