{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1045-1AU60","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1045-1AU60","canonicalUrl":"https://aoctrl.com/siemens/3RT1045-1AU60","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1045-1AU60","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1045-1AU60 power contactor, size S3, screw-type terminals, 37 kW at AC-2 400 V, 66 A at AC-4 400 V, snap-on mounting.","salesMarkdown":"This is the active catalog number for the Siemens SIRIUS S3 power contactor family, so it ships against a standard RFQ without the premium or lead-time risk of an obsolete part. The S3 frame (size S3) is the current-generation mechanical platform; no successor has been issued because none is needed. This is a power contactor rated for motor switching duty. For across-the-line squirrel-cage motors (AC-3), the same contactor handles 45 kW at 500 V and 21.1 kW at 690 V, so the real-world fit depends on your motor nameplate voltage and duty cycle. The AC-4 rating of 66 A at 400 V covers reversing, plugging, and inching applications where the contactor interrupts full locked-rotor current. The S3 footprint is 70 mm wide, 146 mm tall, 139 mm deep, so it occupies a standard four-module width on a 35 mm rail. Main circuit wiring uses screw-type terminals. The stranded wire range goes up to 2x 50 mm², which is generous for a contactor this size — it can take a 1/0 AWG equivalent for high-current feeds. The substance prohibitance date is 05/01/2012, which aligns with the original EU RoHS directive scope. This means the contactor is RoHS-compliant for the standard six substances.","metaTitle":"Siemens 3RT1045-1AU60 SIRIUS Power Contactor, S3, 37 kW AC-2","metaDescription":"Siemens 3RT1045-1AU60 SIRIUS power contactor, size S3, 37 kW at AC-2 400 V, 66 A at AC-4. Screw terminals, snap-on 35/75 mm rail. Current production. RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"139 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"70 mm","at AC":"10 ... 25 ms","Height":"146 mm","Stranded":"2x (10 ... 50 mm²)","at 60 Hz":"0.8 ... 1.1","Arcing Time":"10 ... 15 ms","On The Front":"IP20; IP20 on the front with cover / box terminal","1 Rated Value":"60 Hz","During Storage":"-55 ... +80 °C","Of The Terminal":"IP00","at AC-1 maximum":"900 1/h","at AC-2 maximum":"400 1/h","at AC-3 maximum":"1 000 1/h","at AC-4 maximum":"300 1/h","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm and 75 mm standard mounting rail","Size Of Contactor":"S3","Solid Or Stranded":"2x (2.5 ... 16 mm²)","Product Brand Name":"SIRIUS","Degree Of Pollution":"3","Product Designation":"power contactor","at 24 V rated value":"10 A","at 60 V rated value":"2 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.3 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 500 V rated value":"45 kW","at 60 Hz rated value":"277 V","at 690 V rated value":"21.1 kW","Side-By-Side Mounting":"Yes","at 1000 V rated value":"37 W","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"37 kW","at AC-4 at 400 V rated value":"66 A","Substance Prohibitance (Date)":"05/01/2012","at 40 °C minimum permissible":"50 mm²","at 60 °C minimum permissible":"35 mm²","Insulation Voltage Rated Value":"1 000 V","at 230 V at 60 °C rated value":"38 kW","at 690 V at 60 °C rated value":"114 kW","at 1000 V at 60 °C rated value":"82 W","at AWG cables for main contacts":"2x (10 ... 1/0)","For Auxiliary And Control Circuit":"screw-type terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 160 A","Surge Voltage Resistance Rated Value":"6 kV","With Type Of Coordination 1 Required":"fuse gL/gG: 250 A","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","operational current at AC-12 maximum":"10 A","number of NC contacts for main contacts":"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","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Thermal Short-Time Current Limited To 10 S":"760 A","Finely Stranded Without Core End Processing":"2x (10 ... 35 mm²)","apparent holding power of magnet coil at AC":"21 VA","apparent pick-up power of magnet coil at AC":"300 VA","Type Of Voltage Of The Control Supply Voltage":"AC","Required Spacing For Grounded Parts At The Side":"6 mm","contact rating of auxiliary contacts according to UL":"A600 / Q600","Inductive Power Factor With Closing Power Of The Coil":"0.52","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.29","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","number of NC contacts for auxiliary contacts instantaneous contact":"0","number of NO contacts for auxiliary contacts instantaneous contact":"0","Of The Contactor With Added Electronically Optimized Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$693.70","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=221897&mlfb=3RT1045-1AU60","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1045-1AU60/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional alternative — the 3RT1036-1AB00?","answer":"The 3RT1036-1AB00 is a smaller S2 frame contactor. It will not drop into a panel wired for the S3 frame without mechanical and wiring changes — the mounting hole pattern, terminal spacing, and power ratings are different. The 3RT1045-1AU60 is the correct S3-frame replacement for a 37 kW AC-2 or 45 kW AC-3 motor load; the 3RT1036 is for lower-current applications."},{"question":"What are the key dimensions for panel layout?","answer":"Width is 70 mm, height is 146 mm, depth is 139 mm. It snaps onto 35 mm or 75 mm DIN rail. Side-by-side mounting is allowed, so you can pack multiple units without spacers."},{"question":"What wire sizes does the main circuit terminal accept?","answer":"The screw-type terminals accept stranded conductors up to 2x 50 mm². For the control circuit, solid conductors from 0.5 to 4 mm² are supported."},{"question":"What compliance documentation is available?","answer":"The contactor carries a substance prohibitance date of 05/01/2012, confirming RoHS compliance for the original six substances. The IP20 front protection and pollution degree 3 rating are documented. Standard Siemens declarations of conformity (CE, UKCA) are available upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1045-1AU60","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/3RT1045-1AU60 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}}