{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2445-8XF32-1AC2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2445-8XF32-1AC2","canonicalUrl":"https://aoctrl.com/siemens/3RA2445-8XF32-1AC2","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2445-8XF32-1AC2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2445-8XF32-1AC2 star-delta contactor assembly, 75 kW at 400 V AC-3, 110 kW at 690 V, 3RT2045-1AC20 + 3RT2036-1AC20 contactors, screw terminals, DIN rail mount.","salesMarkdown":"## Star-delta contactor assembly, SIRIUS S3 frame The 3RA2445-8XF32-1AC2: This is a pre-assembled star-delta (wye-delta) contactor set from the SIRIUS series, built around two 3RT2045-1AC20 contactors and one 3RT2036-1AC20 contactor, plus the RS assembly kit 3RA2943-2C. It's a single order code for the whole start circuit — no hunting for individual contactors and interlocking hardware. Rated 75 kW at 400 V and 110 kW at 690 V in AC-3 duty, so it handles the transition from star to delta for a motor up to that power — the 690 V rating matters if you're running a 575 V or 690 V line in a North American or mining installation. Dimensions are 220 mm wide by 180 mm tall by 244 mm deep — confirm the enclosure backplane fits before wiring. ## Sourcing and lifecycle — active, quoted to order Sourced through authorized distribution channels; quantities quoted against your BOM at RFQ. For fuse protection, the assembly requires 160 A gG NH 3NA, DIAZED 5SB, or NEOZED 5SE fuses when using type 2 coordination. Get the fuse spec right on the BOM — mismatched fuses break coordination and you'll lose the starter in a fault. ## Environmental and mounting tolerances Vibration resistance is 10.6 g at 5 ms and 6.3 g at 10 ms — this holds up on a machine frame or conveyor drive base, not just a quiet control panel.","metaTitle":"Siemens 3RA2445-8XF32-1AC2 SIRIUS Star-Delta Starter","metaDescription":"Siemens 3RA2445-8XF32-1AC2 SIRIUS star-delta contactor assembly, 75 kW at 400 V, 110 kW at 690 V. Active production. Quoted to order against BOM.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"244 mm","Width":"220 mm","at AC":"10.6 g / 5 ms, 6.3 g / 10 ms","title":"3RA2445-8XF32-1AC2","Height":"180 mm","Upwards":"10 mm","Forwards":"10 mm","at 50 Hz":"0.35","at 60 Hz":"0.41","Backwards":"0 mm","Downwards":"10 mm","At The Side":"10 mm","description":"Contactor assembly for star-delta (wye-delta) start AC-3, 75 kW/400 V 24 V AC/50/60 Hz Size S3, screw terminal electrical and mechanical interlock 3 NO+3 NC","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","at AC-3 maximum":"1 000 1/h","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm DIN rail","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":"Contactor assembly for star-delta (wye-delta) start","Of Contactor Typical":"10 000 000","at 400 V rated value":"75 kW","at 50 Hz rated value":"24 V","at 60 Hz rated value":"24 V","at 690 V rated value":"110 kW","Instantaneous Contact":"3","For Main Current Circuit":"screw-type terminals","1 Of The Supplied Contactor":"3RT2045-1AC20","2 Of The Supplied Contactor":"3RT2045-1AC20","3 Of The Supplied Contactor":"3RT2036-1AC20","at AC-3 rated value maximum":"690 V","Substance Prohibitance (Date)":"03/01/2017","of the supplied RS assembly kit":"3RA2943-2C","For Auxiliary And Control Circuit":"screw-type terminals","Product Extension Auxiliary Switch":"No","Product Function Bus Communication":"No","With Type Of Assignment 2 Required":"gG NH 3NA, DIAZED 5SB, NEOZED 5SE: 160 A","At Contactor For Auxiliary Contacts":"Screw-type terminals","With Type Of Coordination 1 Required":"gG NH 3NA, DIAZED 5SB, NEOZED 5SE: 250 A","at AWG cables for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14)","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","with low demand rate according to SN 31920":"40 %","Finely Stranded Without Core End Processing":"2x (10 ... 35 mm²), 1x (10 ... 50 mm²)","protocol is supported AS-Interface protocol":"No","with high demand rate according to SN 31920":"73 %","Type Of Voltage Of The Control Supply Voltage":"AC","contact rating of auxiliary contacts according to UL":"A600 / Q600","Of The Supplied Function Module For Wye-Delta Circuits":"3RA2816-0EW20","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","product function control circuit interface with IO link":"No","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gG: 10 A"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/012d36f2b7b9a3a2da7c3f56a89dd296.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629719&mlfb=3RA2445-8XF32-1AC2"},"ai":{"faq":[{"question":"What contactors are supplied with this star-delta assembly?","answer":"The assembly ships with two 3RT2045-1AC20 contactors and one 3RT2036-1AC20 contactor, plus the RS assembly kit 3RA2943-2C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2445-8XF32-1AC2","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/3RA2445-8XF32-1AC2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}