{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1045-1AF00-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1045-1AF00-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1045-1AF00-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1045-1AF00-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1045-1AF00-1AA0 power contactor, size S3, rated 45 kW at 500 V AC-3, screw-type terminals, snap-on mounting on 35 mm and 75 mm DIN rail.","salesMarkdown":"## Siemens SIRIUS 3RT1045-1AF00-1AA0 — power contactor, size S3 The Siemens SIRIUS 3RT1045-1AF00-1AA0 is a size S3 power contactor rated for 45 kW at 500 V in AC-3 duty — the motor-switching category that governs most induction-motor starts and stops. Mounting is via screw or snap-on onto 35 mm and 75 mm standard mounting rail — the 70 mm width means it occupies three 18 mm module positions on a 35 mm DIN rail, or two on a 75 mm rail. The IP20 front protects against finger contact in the panel; the terminal area itself is IP00, so live parts are exposed once the cover is off — standard for power-contactored panels where the gland plate and door interlock provide the outer barrier. Side-by-side mounting is permitted, which keeps the rail fill factor tight when grouping multiple contactors. Main circuit terminals are screw-type. Solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded: 2x (10 to 50 mm²). Auxiliary contact capacity: 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, at 230 V rated value 6 A, at 400 V rated value 3 A (–). The 230 V 6 A rating covers most control-circuit loads in European panels; the 24 V 10 A handles PLC outputs or relay coils without an intermediate interface. ## Operating cycle ratings and thermal limits Maximum switching frequency: AC-1 (resistive) 900 ops/h, AC-2 (slip-ring motor) 400 ops/h, AC-3 (squirrel-cage motor) 1000 ops/h, AC-4 (plugging/inching) 300 ops/h (–). The AC-3 1000 ops/h ceiling is high enough for most conveyor and pump cycling; if your application needs frequent inching or reversing, the AC-4 300 ops/h limit is the binding constraint. Mechanical life typical 10,000,000 operations. Arcing time at AC: 10 to 25 ms, with a narrower 10 to 15 ms window for the main arc. Operating factor at 50 Hz: 0.8 to 1.1. RoHS compliance date: 05/01/2012.","metaTitle":"Siemens 3RT1045-1AF00-1AA0 SIRIUS Power Contactor, Size S3,","metaDescription":"Siemens SIRIUS 3RT1045-1AF00-1AA0 power contactor, size S3, rated 45 kW at 500 V AC-3. Screw terminals, snap-on 35/75 mm DIN rail. IP20 front. Sourced to order against RFQ.","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":"110 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=459105&mlfb=3RT1045-1AF00-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1045-1AF00-1AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RT1045-1AF00-1AA0?","answer":"The depth is 139 mm. Combined with the 146 mm height and 70 mm width, this gives a panel footprint of roughly 146 x 70 mm with 139 mm projection from the mounting rail."},{"question":"What solid wire sizes does 3RT1045-1AF00-1AA0 accept?","answer":"Solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded: 2x (10 to 50 mm²). The 50 mm² stranded max is the key figure for the 45 kW motor circuit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1045-1AF00-1AA0","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/3RT1045-1AF00-1AA0 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}}