{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2445-8XF32-1AG2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2445-8XF32-1AG2","canonicalUrl":"https://aoctrl.com/siemens/3RA2445-8XF32-1AG2","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2445-8XF32-1AG2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S3 star-delta contactor assembly 3RA2445-8XF32-1AG2, 75 kW at 400 V AC-3, 110 V 50/60 Hz coil, screw terminals, screw and snap-on 35 mm DIN rail.","salesMarkdown":"## What this star-delta assembly is and what it delivers The Siemens 3RA2445-8XF32-1AG2 is a factory-assembled star-delta (wye-delta) contactor assembly from the SIRIUS S3 size family. It ships with two 3RT2045-1AG20 contactors and one 3RT2036-1AG20, plus the interlocking and timing kit, so you mount one unit instead of piecing together three contactors and a separate star-delta timer. Rated 75 kW at 400 V AC-3 (110 kW at 690 V), it handles the motor starting current for a 75 kW induction motor on a 400 V line — typical for pumps, compressors, and conveyors in industrial panels. That gives panel builders leeway in tight enclosures. ## Coil voltage, terminals, and auxiliary contacts The magnet coil and main current circuit both use screw-type terminals, accepting 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²) solid or stranded, and AWG 10 to 1/0 for the main contacts. That covers most panel wiring practices. The assembly has three instantaneous contacts. No auxiliary switch is fitted as standard, and no bus communication module is included — this is a straightforward motor-starting assembly, not a networked soft-starter. The supplied RS assembly kit (order code 3RA2943-2C) provides the mechanical interlock and wiring links. ## Environmental limits and vibration resistance Vibration resistance is rated at 10.6 g for 5 ms and 6.3 g for 10 ms under AC shock — adequate for standard industrial machinery but not extreme continuous vibration.","metaTitle":"Siemens 3RA2445-8XF32-1AG2 Star-Delta Contactor Assembly","metaDescription":"Siemens SIRIUS 3RA2445-8XF32-1AG2 star-delta contactor assembly, 75 kW at 400 V, 110 V coil, screw terminals, current lifecycle. Sourced to order against RFQ.","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":"3RA2445-8XF32-1AG2","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 110 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":"110 V","at 60 Hz rated value":"110 V","at 690 V rated value":"110 kW","Instantaneous Contact":"3","For Main Current Circuit":"screw-type terminals","1 Of The Supplied Contactor":"3RT2045-1AG20","2 Of The Supplied Contactor":"3RT2045-1AG20","3 Of The Supplied Contactor":"3RT2036-1AG20","at AC-3 rated value maximum":"690 V","Substance Prohibitance (Date)":"03/01/2017","at AWG cables for main contacts":"2x (10 ... 1/0), 1x (10 ... 2/0)","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":"$506.73","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/8b5abef2f7efdcd528ef2f0385028055.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629720&mlfb=3RA2445-8XF32-1AG2"},"ai":{"faq":[{"question":"Where can I buy the Siemens 3RA2445-8XF32-1AG2 star-delta contactor assembly?","answer":"This part is sourced to order against an RFQ. Availability and pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2445-8XF32-1AG2","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/3RA2445-8XF32-1AG2 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}}