{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1045-3AV60","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1045-3AV60","canonicalUrl":"https://aoctrl.com/siemens/3RT1045-3AV60","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1045-3AV60","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1045-3AV60, size S3 power contactor, screw-type terminals, 37 kW AC-2 at 400 V, 66 A AC-4 at 400 V, snap-on mounting for 35/75 mm rail.","salesMarkdown":"## What this SIRIUS S3 contactor does in a panel The Siemens SIRIUS 3RT1045-3AV60 is a size S3 power contactor — the middle frame in the SIRIUS family, sized for motor loads up to 37 kW under AC-2 duty at 400 V. That AC-2 rating covers slip-ring motor starting and reversing, where the contactor sees moderate inrush and makes/breaks under load. For the tougher AC-4 duty — plugging, inching, jogging — it's rated 66 A at 400 V, so it handles the higher switching frequency and arcing those cycles demand. Mounts on standard 35 mm or 75 mm DIN rail with a screw-and-snap action, or you can bolt it to a backplate. Main terminals are screw-type, accepting solid conductors 2x 0.25...2.5 mm² and stranded 2x 10...50 mm². ## Where the ratings matter for selection The AC-2 37 kW at 400 V tells you this contactor is specced for wound-rotor motors, not the standard squirrel-cage AC-3 duty. If your motor is a standard induction type, you'd size off the AC-3 rating instead — but that figure isn't listed here, so check the motor's duty cycle against the AC-2 or AC-4 curves. That's a real constraint for a conveyor or hoist application — don't overshoot that cycle rate. Dimensions: 146 mm high, 70 mm wide, 139 mm deep. That depth matters when you're laying out a shallow enclosure — 139 mm is the body depth, not including projection of screw terminals or wiring loops. IP20 on the front with the cover or box terminal installed; the terminal itself is IP00, so it's not sealed against dust ingress into the connection area.","metaTitle":"Siemens 3RT1045-3AV60 SIRIUS Power Contactor, 37 kW AC-2, 66","metaDescription":"Siemens SIRIUS 3RT1045-3AV60 size S3 power contactor. 37 kW at AC-2 400 V, 66 A at AC-4 400 V. Screw terminals, snap-on DIN rail. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"139 mm","Solid":"2x (0.25 ... 2.5 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":"480 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":"spring-loaded 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 (24 ... 14)","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 (0.25 ... 1.5 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 (0.25 ... 2.5 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":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=364209&mlfb=3RT1045-3AV60","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1045-3AV60/alternatives.json"},"ai":{"faq":[{"question":"What is the closest functional second-source to 3RT1045-3AV60?","answer":"The 3RT1044-1FB46 is a smaller frame (S2 vs S3) and won't drop into the same panel footprint without rewiring. The 3RT5045-1AF00 and 3RT5045-1AC20 are S3 frame but from the newer SIRIUS 3RT5 generation — same rail mount, but check auxiliary contact configuration and coil voltage before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1045-3AV60","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/3RT1045-3AV60 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}}