{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1266-6NB36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1266-6NB36","canonicalUrl":"https://aoctrl.com/siemens/3RT1266-6NB36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1266-6NB36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS vacuum contactor, Size S10, 210 x 145 x 206 mm, screw fixing, -25 to +60 °C operating range, current lifecycle stage.","salesMarkdown":"The vacuum interrupter technology means the main contacts are sealed in a vacuum chamber, which extinguishes the arc quickly and cleanly — this is the deciding factor for applications with frequent switching or where contact erosion from arcing must be minimized. The Size S10 designation (210 mm height, 145 mm width, 206 mm depth) defines the panel cutout and mounting hole pattern — the footprint is fixed, so verify your enclosure backplate layout against these dimensions before specifying. This gives the panel builder some alignment tolerance but does not change the required clearance zones. The auxiliary contact block carries rated values of 10 A at 24 V, 2 A at 48 V and 60 V, and 1 A at 110 V — these are the switching capacities for control circuits, not the main power path. The main power terminals accept stranded conductors from 70 to 240 mm². The operating range governs panel ambient conditions; the storage range is wider for handling and warehousing, not running. The magnet coil uses screw-type terminals, with a rated control voltage of 21 to 27.3 V. Mechanical life of the contactor is typically 10 million operations, with maximum switching rates of 750 cycles/hour for AC-1, AC-3, and AC-3e duty, and 250 cycles/hour for AC-2 and AC-4 — the lower rate for AC-4 reflects the harsher breaking conditions of plugging and inching duty. The lifecycle status is current.","metaTitle":"Siemens 3RT1266-6NB36 SIRIUS Vacuum Contactor, Size S10","metaDescription":"Siemens 3RT1266-6NB36 SIRIUS vacuum contactor, Size S10. 210 x 145 x 206 mm. Screw fixing. Rated for -25 to +60 °C operation. 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":"80 ... 100 ms","at DC":"80 ... 100 ms","Height":"210 mm","Upwards":"10 mm","Forwards":"20 mm","Stranded":"70 ... 240 mm²","at 50 Hz":"0.4","at 60 Hz":"0.4","Downwards":"10 mm","Arcing Time":"10 ... 15 ms","At The Side":"10 mm","Rated Value":"21 ... 27.3 V","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":"21 ... 27.3 V","at 500 V rated value":"2 A","at 60 Hz rated value":"21 ... 27.3 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","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":"3.4 W","closing power of magnet coil at DC":"630 W","holding power of magnet coil at DC":"3.4 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","With Type Of Coordination 1 Required":"gG: 500 A (690 V, 100 kA)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"14 W","for AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","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","voltage at PLC-control input rated value":"24 V","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","type of PLC-control input according to IEC 60947-1":"Type 2","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","operating range factor of the voltage at PLC-control input":"0.8 ... 1.1","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,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7bd31aec1fdbfe1c01a934e8d5e0e08b.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=213884&mlfb=3RT1266-6NB36","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1266-6NB36/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions of 3RT1266-6NB36?","answer":"Height 210 mm, width 145 mm, depth 206 mm. Fastening is by screw fixing through a single 11 mm hole. The Size S10 frame defines the panel cutout."},{"question":"What wire sizes does the 3RT1266-6NB36 main power terminal accept?","answer":"The main power terminals accept stranded conductors from 70 to 240 mm². The auxiliary/coil terminals accept solid conductors from 0.5 to 4 mm² depending on the number of conductors per terminal."},{"question":"Will 3RT1266-6NB36 drop into a panel specified around 3RT1264-6AP36-0KA1 without rewiring?","answer":"Both are Size S10 frame contactors from the same SIRIUS family, so the mounting footprint and hole pattern are identical. However, the coil voltage and auxiliary contact configuration differ — verify the control circuit voltage and auxiliary wiring before assuming a drop-in swap. The main power terminals accept the same conductor range."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1266-6NB36","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/3RT1266-6NB36 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}