{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1264-6AT36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1264-6AT36","canonicalUrl":"https://aoctrl.com/siemens/3RT1264-6AT36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1264-6AT36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS vacuum contactor, 3RT1264-6AT36, S10 frame size, rated 575... 600 V AC, screw fixing, 210 x 145 x 206 mm.","salesMarkdown":"The 3RT1264-6AT36: The S10 frame is the mechanical platform that determines mounting footprint and main-pole spacing. The contactor accepts stranded power conductors from 70 to 240 mm² — that range covers most motor feeds from roughly 150 A up to 400 A class, so verify your cable size lands within that window before committing the panel layout. Switching frequency depends on duty class: at AC-1 (resistive loads) it can cycle 800 times per hour, at AC-3 (squirrel-cage motors, starting only) 750 cycles per hour, and at AC-4 (plugging, inching, reversing) it drops to 250 cycles per hour. The AC-4 limit is the one that governs a reversing or jogging application — if your line cycles a motor in both directions more than four times a minute, this contactor will exceed its rated mechanical life before the vacuum bottle wears out. Auxiliary control wiring uses screw-type terminals accepting 2x (0.5... 1.5 mm²), 2x (0.75... 2.5 mm²), or max 2x (0.75... 4 mm²) solid or stranded conductors. That gives flexibility for daisy-chaining interlock signals without needing a separate terminal block. Fastening is by screw fixing through a single 11 mm hole. The overall dimensions are 210 mm height, 145 mm width, 206 mm depth. That clearance is for arc venting and heat dissipation — do not crowd the vacuum bottle side against a cable duct or panel wall. Arcing time at break is 10... 15 ms. Those numbers matter for coordination with upstream fuses or circuit breakers — the total fault-clearing time is the sum of the protection device's response plus the contactor's arcing time, so a 15 ms arc at 600 V needs a fuse that can hold through that half-cycle without melting.","metaTitle":"Siemens 3RT1264-6AT36 SIRIUS Vacuum Contactor, S10 Frame, 57","metaDescription":"Siemens 3RT1264-6AT36 SIRIUS vacuum contactor, S10 frame size. Rated 575-600V AC. Current production. Screw fixing. Operating temp -25 to +60°C. 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","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":"575 ... 600 V","Initial Value":"0.8","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","Number Of Holes":"1","at AC-1 maximum":"800 1/h","at AC-2 maximum":"300 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":"180 A","at 50 Hz rated value":"575 ... 600 V","at 500 V rated value":"2 A","at 60 Hz rated value":"575 ... 600 V","at 600 V rated value":"192 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","at 1000 V rated value":"315 kW","For Auxiliary Contacts":"18 ... 14","Width Of Connection Bar":"25 mm","For Main Current Circuit":"Connection bar","at 200/208 V rated value":"60 hp","at 220/230 V rated value":"75 hp","at 460/480 V rated value":"150 hp","at 575/600 V rated value":"200 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":"27 W","at AC-3e rated value maximum":"1 000 V","at AC-4 at 400 V rated value":"195 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":"9 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,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=175354&mlfb=3RT1264-6AT36","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1264-6AT36/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative to the 3RT1264-6AT36?","answer":"The 3RT1056-6AF36-0UA0 and 3RT1076-6AV36 are peer vacuum contactors in the same SIRIUS family. The 3RT1056-6AF36-0UA0 shares the same S10 frame size and voltage class, so it should drop into the same panel footprint without rewiring — but confirm the auxiliary contact configuration and coil voltage on your specific variant before substituting. The 3RT1076-6AV36 is a larger frame size and will not fit the same mounting holes."},{"question":"What is the depth of the 3RT1264-6AT36?","answer":"The depth is 206 mm. Overall dimensions are 210 mm height, 145 mm width, 206 mm depth."},{"question":"What conductor sizes does the 3RT1264-6AT36 accept for main power and control wiring?","answer":"Main power terminals accept stranded conductors from 70 to 240 mm². Auxiliary control terminals accept 2x (0.5... 1.5 mm²), 2x (0.75... 2.5 mm²), or max 2x (0.75... 4 mm²) solid or stranded."},{"question":"Will the 3RT1264-6AT36 drop into a panel originally specified for the 3RT1056-6AF36-0UA0?","answer":"Both parts share the S10 frame size and the SIRIUS vacuum contactor design, so the mounting footprint and main-pole spacing are the same. The 3RT1264-6AT36 is rated 575... 600 V AC, while the 3RT1056-6AF36-0UA0 is a different voltage variant — confirm your panel's coil voltage and auxiliary contact arrangement before direct substitution, but the mechanical fit should not require panel rework."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1264-6AT36","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/3RT1264-6AT36 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}}