{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1066-6QP35","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1066-6QP35","canonicalUrl":"https://aoctrl.com/siemens/3RT1066-6QP35","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1066-6QP35","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S10, 3RT1066-6QP35, rated 300 A at 24 V DC, screw-type coil terminals, IP00/IP20 on front.","salesMarkdown":"The 3RT1066-6QP35: The 300 A rating at 24 V rated value is the DC-1 or resistive-load current at that coil voltage — for motor duty you'll want to check the AC-3 rating (not listed in this spec set, but the S10 frame typically carries a lower AC-3 value). The coil itself is rated 200...277 V AC, screw-type terminals, so it pulls in on standard control voltages across that range. Operating frequency limits are given per duty class: 750 operations/hour at AC-1 maximum (resistive), 250 at AC-2, 500 at AC-3, and 130 at AC-4. The contactor accepts stranded conductors from 70 to 240 mm² on the main power terminals, which is a wide range — it'll take a 70 mm² cable for a 300 A feeder or a 240 mm² for a high-current bus. The solid/stranded auxiliary terminal range is 2x (0.5...1.5 mm²) or 2x (0.75...2.5 mm²), max 2x (0.75...4 mm²), so control wiring is straightforward with standard ferrules. Mounting is by screw fixing — no DIN rail clip on this S10 frame, so you'll bolt it to a backplate or mounting rail. Dimensions are 210 mm high, 165 mm wide, 202 mm deep — that's a substantial footprint, so check your gland plate and wireway clearance before committing the panel layout. Protection rating is IP00 overall, with IP20 on the front when a cover or box terminal is fitted. That means the contactor itself is not touch-safe on the sides or rear — it needs to live inside a locked enclosure or behind a panel door.","metaTitle":"Siemens 3RT1066-6QP35 SIRIUS Power Contactor, S10, 300 A at","metaDescription":"Siemens SIRIUS 3RT1066-6QP35 power contactor, size S10, rated 300 A at 24 V DC. Currently in production. Screw-type coil terminals. IP00/IP20 front. Sourced to order via RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"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":"165 mm","at AC":"80 ... 100 ms","at DC":"80 ... 100 ms","Height":"210 mm","Maximum":"2 000 m","Upwards":"10 mm","Forwards":"20 mm","Stranded":"70 ... 240 mm²","at 50 Hz":"0.5","at 60 Hz":"0.8 ... 1.1","Downwards":"10 mm","Arcing time":"10 ... 15 ms","At The Side":"10 mm","Rated Value":"200 ... 277 V","On The Front":"IP00; IP20 on the front with cover / box terminal","Initial Value":"0.8","Mounting type":"screw fixing","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","Of The Terminal":"IP00","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 ... +55 °C","Full-scale value":"1.1","Mounting position":"with vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back","Size of contactor":"S10","Product brand name":"SIRIUS","Product designation":"Power contactor","at 24 V rated value":"300 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":"90 kW","at 400 V rated value":"71 kW","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","Instantaneous Contact":"1","Side-by-side mounting":"Yes","at 1000 V rated value":"132 kW","For Auxiliary Contacts":"18 ... 14","For Main Current Circuit":"Connection bar","Single Or Multi-Stranded":"2x (0,5 ... 1,5 mm²), 2x (0,75 ... 2,5 mm²), max. 2x (0,75 ... 4 mm²)","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","Of Main Circuit Rated Value":"8 kV","at AC-3 rated value maximum":"1 000 V","at maximum AC-1 rated value":"185 mm²","at AC-2 at 400 V rated value":"160 kW","at AC-4 at 400 V rated value":"280 A","Design of the surge suppressor":"with varistor","at 230 V at 60 °C rated value":"113 kW","at 400 V at 60 °C rated value":"197 kW","at 690 V at 60 °C rated value":"340 kW","at 1000 V at 60 °C rated value":"246 kW","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","Function Module For Communication":"No","Closing power of magnet coil at DC":"580 W","Holding power of magnet coil at DC":"3.8 W","Operating current at AC-12 maximum":"10 A","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)","At Contactor For Auxiliary Contacts":"Screw-type terminals","Protection against electrical shock":"finger-safe when touched vertically from front acc. to IEC 60529","at AWG conductors for main contacts":"2/0 ... 500 kcmil","Mirror contact acc. to IEC 60947-4-1":"Yes","With Type Of Coordination 1 Required":"gG: 500 A (690 V, 100 kA)","Reference code acc. to DIN EN 81346-2":"Q","with high demand rate acc. to SN 31920":"1 000 000","Number of NO contacts for main contacts":"3","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","at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"screw-type terminals","at ambient temperature 40 °C rated value":"330 A","Thermal short-time current limited to 10 s":"2 400 A","Type of voltage of the control supply voltage":"AC/DC","between coil and main contacts acc. to EN 60947-1":"690 V","positively driven operation acc. to IEC 60947-5-1":"No","Contact rating of auxiliary contacts according to UL":"A600 / Q600","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","For Short-Circuit Protection Of The Auxiliary Switch Required":"gG: 10 A (500 V, 1 kA)","Of The Contactor With Added Electronics-Compatible 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=171275&mlfb=3RT1066-6QP35","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1066-6QP35/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions of this contactor?","answer":"Height is 210 mm, width is 165 mm, depth is 202 mm. It mounts via screw fixing, not DIN rail."},{"question":"What wire sizes does it accept on the main terminals?","answer":"Stranded conductors from 70 to 240 mm² on the power terminals. Auxiliary terminals accept 2x (0.5...1.5 mm²) solid or 2x (0.75...2.5 mm²) stranded, max 2x (0.75...4 mm²)."},{"question":"What is the operating temperature range?","answer":"-25 to +55 °C during operation. Storage range is -55 to +80 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1066-6QP35","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/3RT1066-6QP35 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}}