{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2045-1AG24","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2045-1AG24","canonicalUrl":"https://aoctrl.com/siemens/3RT2045-1AG24","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2045-1AG24","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, Power contactor, 3RT2045-1AG24, Size S3, screw-type terminals, 24 VDC coil, screw and snap-on mounting onto 35 mm DIN rail.","salesMarkdown":"## Duty cycle and switching frequency Switching frequency depends on the duty class: AC-1 (resistive loads) maxes at 900 cycles per hour, AC-3 (standard motor starting) at 1,000 cycles per hour, AC-2 (slip-ring motor starting) at 400, and AC-4 (plugging/inching) at 300. The AC-3e rating also comes in at 1,000 cycles per hour. For a conveyor or pump running a normal start/stop cycle, the AC-3 figure is what governs — 1,000 ops/hour is comfortably above most line rates. Mechanical life is typical at 10 million operations. Arcing time runs 10 to 20 ms, and the make time at AC is 10 to 21 ms. Those are the numbers you'd plug into a coordination study if you're checking selectivity with an upstream breaker. ## Termination and auxiliary contacts Main circuit terminals accept solid conductors from 2.5 to 16 mm² and stranded from 6 to 70 mm². The auxiliary circuit takes 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded. That covers most panel wiring — no need for special ferrules or adapters unless you're running a very heavy feeder. Its rated values vary by voltage: 6 A at 24 V, 2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, 3 A at 400 V, and 0.8 A at 440 V. The 230 V rating is given in horsepower — 15 hp. Coil consumption is 0.35 A at 50 Hz and 0.41 A at 60 Hz. That's the magnet coil draw — factor it into your 24 VDC power supply sizing, especially if you're ganging several contactors in one cabinet. ## Dimensions and clearances The contactor measures 140 mm high, 70 mm wide, and 195 mm deep. That depth is the dimension you need to watch when fitting it into a shallow enclosure — 195 mm is deeper than a typical IEC contactor in this frame class, so check the back-can clearance. Those are the ventilation and arc-chamber spacing — don't crowd them if you want full rated life.","metaTitle":"Siemens 3RT2045-1AG24 SIRIUS Power Contactor, S3, 24 VDC Coi","metaDescription":"Siemens SIRIUS 3RT2045-1AG24 power contactor, size S3, screw terminals, 24 VDC coil, AC-3 switching up to 1000 cycles/h. Active lifecycle, sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"195 mm","Solid":"2.5 ... 16 mm²","Width":"70 mm","at AC":"10 ... 21 ms","Height":"140 mm","Upwards":"10 mm","Forwards":"20 mm","Stranded":"6 ... 70 mm²","at 50 Hz":"0.35","at 60 Hz":"0.41","Downwards":"10 mm","Arcing Time":"10 ... 20 ms","At The Side":"10 mm","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","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","Auxiliary Switch":"Yes","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715","at AC-3e maximum":"1 000 1/h","For Main Contacts":"10 ... 2","Mounting Position":"+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface","Size Of Contactor":"S3","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Product Brand Name":"SIRIUS","Product Designation":"Power contactor","at 24 V rated value":"6 A","at 48 V rated value":"2 A","at 60 V rated value":"2 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 125 V rated value":"0.9 A","at 220 V rated value":"0.3 A","at 230 V rated value":"15 hp","at 400 V rated value":"3 A","at 440 V rated value":"0.8 A","at 480 V rated value":"77 A","at 50 Hz rated value":"110 V","at 500 V rated value":"2 A","at 60 Hz rated value":"110 V","at 600 V rated value":"62 A","at 690 V rated value":"1 A","Side-By-Side Mounting":"Yes","at 1000 V rated value":"37 kW","For Auxiliary Contacts":"20 ... 14","For Main Current Circuit":"screw-type terminals","at 110/120 V rated value":"7.5 hp","at 200/208 V rated value":"25 hp","at 220/230 V rated value":"30 hp","at 460/480 V rated value":"60 hp","at 575/600 V rated value":"60 hp","Relative Humidity Minimum":"10 %","Of Main Circuit Rated Value":"8 kV","Safety-Related Switching On":"Yes","at AC-3 rated value maximum":"1 000 V","at AC in hot operating state":"15.9 W","at AC-2 at 400 V rated value":"37 kW","at AC-3e rated value maximum":"1 000 V","at AC-4 at 400 V rated value":"66 A","safety-related switching OFF":"Yes","Substance Prohibitance (Date)":"03/01/2017","at AWG cables for main contacts":"2x (10 ... 1/0), 1x (10 ... 2)","Of Auxiliary Circuit Rated Value":"6 kV","at AC-5a up to 690 V rated value":"110 A","at AC-5b up to 400 V rated value":"80 A","For Auxiliary And Control Circuit":"screw-type terminals","Function Module For Communication":"No","With Type Of Assignment 2 Required":"gG: 160A (690V,100kA), aM: 80A (690V,100kA), BS88: 125A (415V,80kA)","Without Load Current Share Typical":"25 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","With Type Of Coordination 1 Required":"gG: 250 A (690 V, 100 kA), aM: 160 A (690 V, 100 kA), BS88: 200 A (415 V, 80 kA)","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","operational current at AC-12 maximum":"10 A","at AC in hot operating state per pole":"5.3 W","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)","mirror contact according to IEC 60947-4-1":"Yes","with low demand rate according to SN 31920":"40 %","with high demand rate according to SN 31920":"73 %","Type Of Voltage Of The Control Supply Voltage":"AC","Limited To 1 S Switching At Zero Current Maximum":"1 500 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 5 S Switching At Zero Current Maximum":"1 186 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 10 S Switching At Zero Current Maximum":"851 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 30 S Switching At Zero Current Maximum":"538 A; Use minimum cross-section acc. to AC-1 rated value","Limited To 60 S Switching At Zero Current Maximum":"423 A; Use minimum cross-section acc. to AC-1 rated value","contact rating of auxiliary contacts according to UL":"A600 / P600","Of Main Circuit With Degree Of Pollution 3 Rated Value":"1 000 V","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","Of Auxiliary Circuit With Degree Of Pollution 3 Rated Value":"690 V","For Short-Circuit Protection Of The Auxiliary Switch Required":"gG: 10 A (500 V, 1 kA)","minimum cross-section in main circuit at maximum AC-1 rated value":"50 mm²","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":"$146.05","priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/7d28fa7380658c541019ac8751bc4da6.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629768&mlfb=3RT2045-1AG24","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2045-1AG24/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT2045-1AG24 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"Will 3RT2045-1AG24 drop into a panel specified around 3RT5045-1AF00?","answer":"Both are Siemens SIRIUS size S3 contactors with screw terminals on a 35 mm DIN rail, so the footprint and mounting are identical. The main difference is the coil voltage — the 3RT2045-1AG24 uses a 24 VDC coil, while the 3RT5045-1AF00 uses a different coil voltage. Check that your control voltage matches before swapping."},{"question":"What is the depth of the 3RT2045-1AG24?","answer":"The depth is 195 mm. This is the dimension from the DIN rail mounting surface to the front of the contactor, including the arc chamber."},{"question":"What wire sizes does the 3RT2045-1AG24 accept?","answer":"Main circuit terminals accept solid conductors from 2.5 to 16 mm² and stranded from 6 to 70 mm². Auxiliary terminals accept 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2045-1AG24","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/3RT2045-1AG24 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}}