{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1066-6AP36-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1066-6AP36-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RT1066-6AP36-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1066-6AP36-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S10, 220-240 V AC 50/60 Hz coil, screw-type coil terminals, 3-pole, main current path accepting 70-240 mm² stranded copper.","salesMarkdown":"The 3RT1066-6AP36-ZX95: The 220-240 V AC coil (50/60 Hz) draws its magnetising current from the control transformer; the screw-type coil terminals accept up to 4 mm² stranded or solid wire. The main power path accepts stranded copper from 70 mm² up to 240 mm² — that is a serious conductor cross-section, sized for high-current feeders typical of large motor starters or distribution. The contactor is fastened by screw fixing through an 11 mm hole, not DIN-rail snap-on, so plan the backplate layout accordingly. That helps in tight enclosures where the contactor must sit at an angle to clear busbars or other gear. The wide storage band is typical for SIRIUS gear — it ships fine in unheated warehouses. ## Switching frequency and duty-cycle limits The maximum switching rate depends on the utilisation category: 750 operations/hour in AC-1 (resistive), 500/h in AC-3 (squirrel-cage motor start/run), 250/h in AC-2 (slip-ring motor), and 130/h in AC-4 (plugging/inching). The AC-3e rating also sits at 500/h. These are the contactor's thermal limits — exceeding them shortens life or welds the main poles. Arcing time is 10-15 ms, and the opening/closing times (including bounce) are 40-80 ms for both AC and DC operation. That matters for coordination with upstream short-circuit protection — the total clearing time of the fuse or MCCB must account for the contactor's arcing window. The contactor includes an auxiliary switch block (1 NO + 1 NC typical for S10), which can be wired for feedback to the PLC or for electrical interlocking. ## Clearance and wiring space Physical envelope: 210 mm high, 145 mm wide, 202 mm deep. That is a large contactor — the S10 frame is the biggest in the SIRIUS line, so verify the enclosure depth before committing. The forward clearance is the tightest — 20 mm is barely enough for the main cable lugs and the arc chute. The main power terminals accept 70-240 mm² stranded copper — that is a single large cable per pole or parallel smaller cables. The auxiliary terminals accept 0.5-1.5 mm² solid or 0.75-2.5 mm² stranded, up to 4 mm² maximum. Use ferrules on stranded wire for reliable termination in the screw cages. Sourced to order against the BOM quantity.","metaTitle":"Siemens 3RT1066-6AP36-ZX95 SIRIUS Power Contactor, S10","metaDescription":"Siemens SIRIUS power contactor, size S10, 220-240 V AC coil, screw terminals. Rated for 70-240 mm² main conductors. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"202 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":"3RT1066-6AP36-ZX95","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":"220 ... 240 V","description":"power contactor, AC-3e/AC-3 300 A, 160 kW / 400 V, AC (50-60 Hz) / DC Uc: 220-240 V 3-pole, auxiliary contacts 2 NO + 2 NC drive: conventional main circuit: busbar control and auxiliary circuit: screw terminal reusable packaging = 2 units","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":"500 1/h","at AC-4 maximum":"130 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":"500 1/h","Diameter Of Holes":"11 mm","Mounting Position":"with vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back","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":"Power 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 440 V rated value":"1.4 A","at 480 V rated value":"302 A","at 50 Hz rated value":"220 ... 240 V","at 500 V rated value":"2 A","at 60 Hz rated value":"220 ... 240 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":"132 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":"66 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","at AC-5a up to 690 V rated value":"290 A","at AC-5b up to 400 V rated value":"249 A","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 400 A (690 V, 100 kA), aM: 315 A (690 V, 50 kA), BS88: 400 A (415 V, 50 kA)","Without Load Current Share Typical":"7.4 W","closing power of magnet coil at DC":"650 W","holding power of magnet coil at DC":"7.4 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":"22 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","Limited To 1 S Switching At Zero Current Maximum":"5 524 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"4 579 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"3 153 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"1 883 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"1 445 A; Use minimum cross-section acc. to AC-1 rated value","contact rating of auxiliary contacts according to UL":"A600 / Q600","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","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/6bad1ac563cf97fd341f8c7d794878af.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=313833&mlfb=3RT1066-6AP36-ZX95"},"ai":{"faq":[{"question":"What size main conductors does this contactor accept?","answer":"The main power terminals accept stranded copper from 70 mm² up to 240 mm² per pole."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1066-6AP36-ZX95","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/3RT1066-6AP36-ZX95 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}}