{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1045-1AV00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1045-1AV00","canonicalUrl":"https://aoctrl.com/siemens/3RT1045-1AV00","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1045-1AV00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S3 power contactor, 3RT1045-1AV00, 37 kW at 400 V AC-2, screw-type terminals, snap-on DIN rail mounting.","salesMarkdown":"That's the rating that governs the real load, not the AC-3 figure. If you're switching standard squirrel-cage motors, the AC-3 curve is the one to check — this contactor delivers 45 kW at 500 V and 21.1 kW at 690 V, so it covers a wide voltage band without derating surprises. For heavy inching or plugging duty (AC-4), it's rated 66 A at 400 V. That's the worst-case thermal stress number — if your application cycles hard, that's the current limit to respect. The S3 frame footprint is 70 mm wide by 146 mm tall by 139 mm deep. Main power terminals are screw-type, accepting solid conductors up to 2x 4 mm² (or 2x 2.5 mm² stranded) and stranded up to 2x 50 mm². That's generous for a contactor this size — you can land a 50 mm² cable without a ferrule adapter. The IP20 front cover with box terminal keeps live parts behind a tool-removed shield, which satisfies most panel-build requirements for finger-safe wiring. The side-by-side mounting allowance (no derating gap needed) saves rail space when ganging multiple contactors. RoHS compliance date is 05/01/2012, so it's been fully RoHS-compliant for over a decade. No REACH or UL mark is explicitly listed in the spec record, but as a Siemens SIRIUS product it carries CE and typically UL/CSA — confirm with the full datasheet for your specific certification requirement.","metaTitle":"Siemens 3RT1045-1AV00 SIRIUS S3 Power Contactor, 37 kW AC-2","metaDescription":"Siemens 3RT1045-1AV00 SIRIUS S3 power contactor. 37 kW at 400 V AC-2, 45 kW at 500 V. Screw terminals, DIN rail mount. Active production. Sourced to order.","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 50 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":"50 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 50 Hz rated value":"400 V","at 500 V rated value":"45 kW","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":"22 VA","apparent pick-up power of magnet coil at AC":"270 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":"0.68","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Inductive Power Factor With The Holding Power Of The Coil":"0.27","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=274046&mlfb=3RT1045-1AV00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1045-1AV00/alternatives.json"},"ai":{"faq":[{"question":"What wire sizes does the screw terminal accept?","answer":"Solid conductors: 2x (0.5–1.5 mm²), 2x (0.75–2.5 mm²), max 2x (0.75–4 mm²). Stranded: 2x (10–50 mm²). That's a wide range — from control wiring up to 50 mm² power cables."},{"question":"Will it drop into a panel specified for 3RT1044-1FB46?","answer":"Both are S3 frame size, so the physical footprint and DIN rail clip are identical. The main difference is the coil voltage and possibly auxiliary contacts. The 3RT1045-1AV00 uses screw terminals; the 3RT1044-1FB46 may use spring-cage or a different coil. Check the coil rating before substituting — if the coil voltage matches, it's a mechanical drop-in."},{"question":"What compliance documentation does this carry?","answer":"RoHS compliance date is 05/01/2012. As a Siemens SIRIUS product, it typically carries CE marking and may have UL/CSA listings — confirm with the full datasheet for your jurisdiction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1045-1AV00","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/3RT1045-1AV00 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}}