{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1045-1AD24","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1045-1AD24","canonicalUrl":"https://aoctrl.com/siemens/3RT1045-1AD24","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1045-1AD24","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, S3 frame, 3RT1045-1AD24, 45 kW at 500 V AC-3, 21.1 kW at 690 V, screw terminals, 24 V AC coil, IP20 front.","salesMarkdown":"The Siemens SIRIUS 3RT1045-1AD24 is a S3-frame power contactor rated for motor switching at 45 kW on a 500 V AC-3 supply and 21.1 kW at 690 V. The 24 V AC coil pulls in reliably across 0.8 to 1.1 times rated voltage at 50 Hz and 0.85 to 1.1 at 60 Hz. The 70 mm width, 146 mm height, and 188 mm depth fit a standard S3 panel footprint. Side-by-side mounting is permitted, so multiple contactors pack tightly on the rail without mandatory spacing gaps. IP20 on the front with the cover or box terminal installed; the terminal body itself is IP00, meaning the wiring compartment expects enclosure protection from the panel. ## Duty cycle and switching frequency Switching frequency varies by duty class: 900 operations per hour at AC-1 (resistive), 400 at AC-2 (slip-ring motor), 1,000 at AC-3 (squirrel-cage motor starting), and 300 at AC-4 (plugging/inching). The arcing time sits between 10 and 25 ms at AC, with a typical 10–15 ms window. ## Environmental range That covers unheated plant floors and hot panel interiors near motor starters. The 24 V DC coil draws 10 A at rated voltage; at 60 V DC the switching capacity drops to 2 A, at 220 V DC to 0.3 A — typical for DC load breaking in control circuits.","metaTitle":"Siemens 3RT1045-1AD24 SIRIUS Power Contactor, 45 kW at 500 V","metaDescription":"Siemens 3RT1045-1AD24 SIRIUS S3 power contactor. Rated 45 kW at 500 V AC-3, 21.1 kW at 690 V. Screw terminals, 24 V AC coil. Current lifecycle stage. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"188 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","at 60 Hz":"0.85 ... 1.1","Arcing Time":"10 ... 15 ms","On The Front":"IP20; IP20 on the front with cover / box terminal","1 Rated Value":"50 Hz","2 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 50 Hz rated value":"42 V","at 500 V rated value":"45 kW","at 60 Hz rated value":"42 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":"27 VA","apparent pick-up power of magnet coil at AC":"298 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":"0.7","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":"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,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=407196&mlfb=3RT1045-1AD24","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1045-1AD24/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1045-1AD24 and how do I get a price?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for quote to confirm current availability and pricing at the time of your order."},{"question":"Will 3RT1045-1AD24 drop into a panel specified for 3RT1044-1FB46 without rewiring?","answer":"Both are SIRIUS S3-frame contactors with the same 70 mm width, 146 mm height, and 188 mm depth, and both use screw-type main circuit terminals. The footprint and mounting rail are identical, so the 3RT1045-1AD24 fits the same panel cutout and DIN rail position. Verify the coil voltage and auxiliary contact configuration match your control circuit before swapping."},{"question":"What compliance documentation does Siemens provide for 3RT1045-1AD24?","answer":"Siemens typically provides RoHS, REACH, and UL/IEC declarations for the SIRIUS contactor series. Specific certificates for this order code are available on request as part of the RFQ process."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1045-1AD24","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/3RT1045-1AD24 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}}