{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1066-6NP36","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1066-6NP36","canonicalUrl":"https://aoctrl.com/siemens/3RT1066-6NP36","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1066-6NP36","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, size S10, 3RT1066-6NP36, 200-277 V AC/DC coil, screw terminals, 240 mm² main conductor cross-section.","salesMarkdown":"## Duty-cycle capability and switching frequency The contactor is rated for different switching frequencies depending on the duty class: 750 operations per hour in AC-1 (resistive), 500/h in AC-3 (motor start/run), and 130/h in AC-4 (plugging/inching). The AC-3e rating matches the AC-3 figure at 500/h. For a conveyor drive cycling every 30 seconds, the AC-3 limit of 500/h gives headroom; a reversing starter doing frequent inching will hit the AC-4 ceiling of 130/h and may need a larger frame or forced cooling. Under AC-3 duty at rated load, electrical life will be lower; the mechanical figure tells you the actuator and spring set are built for a long service interval in a cycling application. Mounting is via screw fixing through an 11 mm hole, one hole per contactor. That is a through-bolt pattern, not DIN rail — so the panel backplate needs drilled and tapped holes or a mounting rail adapter. The size S10 frame measures 210 mm high by 145 mm wide by 202 mm deep, which is a substantial footprint; plan for gland plate clearance and busbar routing. That allows the contactor to be oriented for busbar access or cable entry without derating, as long as the vertical plane is maintained. These are minimums for arc flash containment and cooling airflow — crowding the contactor against the enclosure wall or another device will reduce the switching frequency capability. ## Control circuit and auxiliary contacts The magnet coil uses screw-type terminals, accepting solid or stranded conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²). That covers standard control wiring up to 12 AWG. The contactor includes an auxiliary switch, with ratings of 10 A at 24 V, 2 A at 48 V and 60 V, and 1 A at 110 V — sufficient for signaling to a PLC input or a pilot light. That is typical for a contactor of this size; the DC coil version avoids the hum and dropout delay of an AC coil rectifier. ## Environmental ratings and storage","metaTitle":"Siemens 3RT1066-6NP36 SIRIUS Power Contactor, S10 Size, 200-","metaDescription":"Siemens 3RT1066-6NP36 SIRIUS power contactor, size S10, 200-277V AC/DC coil, rated for motor loads up to 240 mm² cable. Current production status. Available to order. Request a quo","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":"80 ... 100 ms","at DC":"80 ... 100 ms","title":"3RT1066-6NP36","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 Uc: 200-277 V PLC input 24 V DC 3-pole, auxiliary contacts 2 NO + 2 NC 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":"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":"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","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":"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","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","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","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","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/dea5d6293cba10f410b3e58d1226fd93.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=17197&mlfb=3RT1066-6NP36"},"ai":{"faq":[{"question":"Where can I buy the 3RT1066-6NP36 and get a price?","answer":"This part is sourced and quoted to order through independent distribution. Submit an RFQ for current availability and pricing — the quote will reflect the market at the time of request, not a fixed list price."},{"question":"What is the closest functional second-source to the 3RT1066-6NP36?","answer":"The 3RT1264-6AP36-0KA1 is a peer in the same SIRIUS family, but it carries a different coil voltage and auxiliary configuration. The 3RT1066-6NP36 uses a 200-277 V AC/DC coil with screw terminals; the 3RT1264 variant may differ in coil range and terminal style. Verify the coil voltage and auxiliary contact arrangement before substituting — the frame size and main power path are similar, but the control circuit wiring may not drop in without changes."},{"question":"What is the depth of the 3RT1066-6NP36?","answer":"The depth is 202 mm. That is the dimension from the mounting surface to the furthest projection of the contactor body — factor it into enclosure depth and gland plate clearance."},{"question":"What conductor cross-sections does the 3RT1066-6NP36 accept on the control circuit?","answer":"The screw-type coil terminals accept solid or stranded conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or a maximum of 2x (0.75 to 4 mm²). That covers standard control wiring from 20 AWG to 12 AWG."},{"question":"What compliance documentation is available for the 3RT1066-6NP36?","answer":"As a Siemens SIRIUS product, this contactor is designed to meet IEC and UL/CSA standards typical for industrial control equipment. Specific declarations (RoHS, REACH, CE, UKCA, EAC) are part of the standard documentation package provided with the shipment. Request the compliance certificate at time of order if a specific scheme is required for your jurisdiction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1066-6NP36","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/3RT1066-6NP36 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}}