{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT2045-1AL26","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT2045-1AL26","canonicalUrl":"https://aoctrl.com/siemens/3RT2045-1AL26","factsUrl":"https://aoctrl.com/api/mcp/products/3RT2045-1AL26","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT2045-1AL26, S3 frame size, 80 mm width, screw and snap-on mounting on 35 mm DIN rail per DIN EN 60715, with auxiliary switch, screw-type coil terminals.","salesMarkdown":"## Siemens 3RT2045-1AL26 — SIRIUS Power Contactor, S3 Frame The contactor measures 80 mm wide by 140 mm high by 152 mm deep, fitting standard panel layouts with clearance requirements of 10 mm upwards, 20 mm forwards, 10 mm downwards, and 10 mm at the side. It accepts solid conductors from 2.5 to 16 mm² and stranded conductors from 6 to 70 mm², with fine-stranded capacity for 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²). The main contacts are configured as 10 normally open and 2 normally closed, and the contactor is rated for mechanical service life of 10,000,000 operations typical. ## Duty Class and Switching Frequency Switching frequency varies by duty class: AC-1 (resistive) maximum 900 cycles/h, AC-2 (slip-ring motor) maximum 400 cycles/h, AC-3 (squirrel-cage motor starting) maximum 1,000 cycles/h, AC-3e (enhanced AC-3) also 1,000 cycles/h, and AC-4 (plugging/inching) maximum 300 cycles/h. Operating time is 10 to 21 ms at AC, with arcing time of 10 to 20 ms. Power factor is 0.35 at 50 Hz and 0.41 at 60 Hz. ## Auxiliary Contact Ratings and Environmental Range The auxiliary switch is rated for 6 A at 24 V, 2 A at 48 V, 2 A at 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.","metaTitle":"Siemens 3RT2045-1AL26 SIRIUS Power Contactor, S3 Frame, 80 m","metaDescription":"Siemens 3RT2045-1AL26 SIRIUS power contactor, S3 size, 80 mm width, screw and snap-on DIN rail mount. Rated for AC-3 switching at 1000 cycles/h. Current lifecycle stage. Sourced to","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Contactors"],"specifications":{"Depth":"152 mm","Solid":"2.5 ... 16 mm²","Width":"80 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":"230 V","at 500 V rated value":"2 A","at 60 Hz rated value":"230 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","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":null,"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=629777&mlfb=3RT2045-1AL26","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT2045-1AL26/alternatives.json"},"ai":{"faq":[{"question":"What are the key dimensions of 3RT2045-1AL26 for panel layout?","answer":"The contactor measures 80 mm wide, 140 mm high, and 152 mm deep. Required clearances are 10 mm upwards, 20 mm forwards, 10 mm downwards, and 10 mm at the side."},{"question":"What conductor sizes does 3RT2045-1AL26 accept?","answer":"It accepts solid conductors from 2.5 to 16 mm² and stranded conductors from 6 to 70 mm². For fine-stranded wire, it accepts 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²)."},{"question":"How do I get current pricing and availability for 3RT2045-1AL26?","answer":"Pricing and availability are confirmed at quote time. Submit an RFQ through the storefront for a current quote on this part."},{"question":"What is the AC-3 switching frequency for this contactor?","answer":"The maximum switching frequency in AC-3 duty (squirrel-cage motor starting) is 1,000 cycles per hour."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT2045-1AL26","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/3RT2045-1AL26 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}}