{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1066-6SP36-3PA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1066-6SP36-3PA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1066-6SP36-3PA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1066-6SP36-3PA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, Size S10, 3RT1066-6SP36-3PA0, 200-277 V AC coil, screw-type terminals, 210 x 145 x 202 mm, MTBF 75 a.","salesMarkdown":"It's the big-frame member of the SIRIUS family — the one you spec when the smaller sizes run out of thermal headroom or contact gap. The coil pulls in on 200-277 V AC, which is a standard control voltage range across European and North American panel designs — no separate control transformer tap needed if your panel bus is already at 230 V or 277 V. Operate time sits at 115-130 ms on both AC and DC, with an arcing time of 10-15 ms, so it's not a fast-switching device but it's predictable for coordination studies. Mechanical life is rated at 10,000,000 cycles typical, and the MTBF is listed at 75 a — that's 75 years mean time between failures under stated conditions, which for a contactor this size means the coil and main contacts are built to outlast the panel's service life if the switching frequency stays within the duty limits. This contactor is rated for multiple duty classes, and the switching frequency limits tell you which one governs your application. At AC-1 (resistive loads) and AC-3 (squirrel-cage motors — starting, running, stopping under load) it handles up to 500 operations per hour. At AC-2 (slip-ring motors, starting only) it's derated to 250 ops/h. At AC-4 (plugging, inching, reversing under full load) it drops to 130 ops/h. If your application is a reversing conveyor or a press that jogs frequently, the AC-4 limit is the one that matters — exceed it and the arc chutes wear fast. The auxiliary switch block is present and rated: 10 A at 24 V, 2 A at 48 V, 2 A at 60 V — all DC resistive loads. That's enough for a PLC input or a relay coil, but watch the inductive load derating if you're switching contactor coils or solenoid valves off the aux. ## Mounting and wiring — panel integration Mounting is screw fixing, not DIN rail — this is a Size S10 frame (210 mm high, 145 mm wide, 202 mm deep) that bolts to a backplate. Power-side cable termination accepts stranded conductors from 70 to 240 mm² — that's a serious cable, typically 1/0 AWG to 500 kcmil, so plan your gland plate and bend radius accordingly. The coil and auxiliary terminals are screw-type, accepting 2x (0.5-1.5 mm²) solid or 2x (0.75-2.5 mm²) stranded, with a max of 2x (0.75-4 mm²). The contactor is rated for use in a standard industrial enclosure; no special derating needed up to 60 °C ambient, but above that you'd need to consult the thermal curve.","metaTitle":"Siemens 3RT1066-6SP36-3PA0 SIRIUS Power Contactor, Size S10,","metaDescription":"Siemens SIRIUS 3RT1066-6SP36-3PA0 power contactor, Size S10, 200-277V AC coil, screw terminals. MTBF 75 a. Active production. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"MTBF":"75 a","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":"115 ... 130 ms","at DC":"115 ... 130 ms","title":"3RT1066-6SP36-3PA0","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":"200 ... 277 V","description":"power contactor, AC-3e/AC-3 300 A, 160 kW / 400 V, AC (50-60 Hz) / DC 200-277 V x (0.8-1.1) F-PLC input 24 V DC 3-pole, auxiliary contacts 2 NO + 2 NC permanently mounted drive: electronic 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":"500 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":"200 ... 277 V","at 500 V rated value":"2 A","at 60 Hz rated value":"200 ... 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":"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","Safe failure fraction (SFF)":"93 %","Safety-Related Switching On":"No","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-2 at 400 V rated value":"160 kW","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)":"03/01/2017","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":"3.4 W","closing power of magnet coil at DC":"580 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)","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","category according to EN ISO 13849-1":"2","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"22 W","stop category according to EN 60204-1":"0","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)","Recovery Time After Power Failure Typical":"2 s","mirror contact according to IEC 60947-4-1":"Yes","safety device type according to IEC 61508-2":"Type B","Type Of Voltage Of The Control Supply Voltage":"AC/DC","hardware fault tolerance according to IEC 61508":"0","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","PFHD with high demand rate according to EN 62061":"4.5E-7 1/h","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","SIL Claim Limit (subsystem) according to EN 62061":"2","PFDavg with low demand rate according to IEC 61508":"0.007","performance level (PL) according to EN ISO 13849-1":"c","type of PLC-control input according to IEC 60947-1":"Type 1","contact rating of auxiliary contacts according to UL":"A600 / P600","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7458d83cd5114606319ee108cd54859a.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=907609&mlfb=3RT1066-6SP36-3PA0"},"ai":{"faq":[{"question":"What is the MTBF of 3RT1066-6SP36-3PA0?","answer":"The listed MTBF is 75 a (75 years), which under typical industrial conditions means the contactor is designed to outlast the panel's service life if operated within its duty-cycle limits."},{"question":"Where can I buy 3RT1066-6SP36-3PA0 and how is it quoted?","answer":"This part is sourced through independent distribution channels and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"Will 3RT1066-6SP36-3PA0 drop into a panel specified around 3RT1266-6AP36-0KA1?","answer":"The 3RT1066-6SP36-3PA0 is a Size S10 frame with screw fixing, while the 3RT1266-6AP36-0KA1 is a different variant within the same SIRIUS family. Both share the S10 frame size, but verify the coil voltage (200-277 V AC on this unit) and auxiliary wiring before assuming a drop-in replacement — the terminal arrangement and aux contact configuration may differ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1066-6SP36-3PA0","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/3RT1066-6SP36-3PA0 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}}