{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1045-1AG24","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1045-1AG24","canonicalUrl":"https://aoctrl.com/siemens/3RT1045-1AG24","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1045-1AG24","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S3, 50/60 Hz, screw-type terminals, screw and snap-on mounting onto 35 mm and 75 mm standard mounting rail, IP20 on front.","salesMarkdown":"## SIRIUS S3 Power Contactor — 3RT1045-1AG24 It is rated for operation at 50 Hz and 60 Hz supply frequencies, per the datasheet. Side-by-side mounting is permitted, so multiple contactors can be ganged without mandatory spacing gaps. The main circuit uses screw-type terminals, with a solid conductor capacity of 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and up to 2x (0.75 to 4 mm²). Stranded conductors accept 2x (10 to 50 mm²). This range covers typical power wiring from control-circuit sizes up to main feeder cables. ## Duty Ratings and Switching Frequency Motor power ratings are specified per standard utilization categories: at 50 Hz, 110 V the contactor switches 45 kW; at 60 Hz, 110 V the rating is also 45 kW. At 690 V, 50 Hz, the motor power rating is 21.1 kW. These figures align with the S3 frame size and confirm the contactor is sized for medium-horsepower motor control. AC-1 allows up to 900 operations per hour; AC-3 permits 1,000 ops/h; AC-4 is limited to 300 ops/h. AC-2 maximum is 400 ops/h. ## Environmental and Protection Ratings Front protection is IP20 with the cover or box terminal installed, which prevents finger contact with live parts during normal operation. The terminal area itself is rated IP00, so the panel builder must ensure that the enclosure provides additional protection against tool or wire contact. Auxiliary contact ratings are provided for DC switching: at 24 V rated value 10 A, at 60 V rated value 2 A, at 110 V rated value 1 A, at 220 V rated value 0.3 A. For AC-15 (solenoid/contactor coil) duty at 230 V, the rating is 6 A; at 400 V, 3 A. These values define the maximum current the auxiliary contacts can break in inductive DC or AC control circuits.","metaTitle":"Siemens 3RT1045-1AG24 SIRIUS Power Contactor, S3, 50/60 Hz","metaDescription":"Siemens SIRIUS 3RT1045-1AG24 power contactor, size S3, 50/60 Hz coil. Screw/snap-on 35/75 mm rail. IP20 front. 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":"110 V","at 500 V rated value":"45 kW","at 60 Hz rated value":"110 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=423621&mlfb=3RT1045-1AG24","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1045-1AG24/alternatives.json"},"ai":{"faq":[{"question":"Will 3RT1045-1AG24 drop into a panel specified around 3RT1044-1FB46 without rewiring?","answer":"Both are SIRIUS S3 contactors with the same mounting footprint on 35 mm or 75 mm DIN rail, so mechanical fit is identical. However, verify the coil voltage and auxiliary contact configuration of 3RT1044-1FB46 against the 3RT1045-1AG24 before assuming electrical interchangeability — the coil and auxiliary ratings may differ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1045-1AG24","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/3RT1045-1AG24 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}}