{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2444-8XF32-1AC2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2444-8XF32-1AC2","canonicalUrl":"https://aoctrl.com/siemens/3RA2444-8XF32-1AC2","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2444-8XF32-1AC2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2444-8XF32-1AC2 star-delta contactor assembly, S3 size, 55 kW at 400 V, 90 kW at 690 V, screw-type terminals, DIN rail mount.","salesMarkdown":"## 55 kW at 400 V — star-delta contactor assembly, S3 frame The 3RA2444-8XF32-1AC2: It ships with three contactors: two 3RT2045-1AC20 units for the line and delta legs, and one 3RT2035-1AC20 for the star leg, plus the RS assembly kit 3RA2943-2C. The S3 frame size means the contactor footprint matches the panel cutout for this class. The assembly mounts on 35 mm DIN rail via screw and snap-on fastening, with ±180° rotation possible on a vertical surface and ±22.5° tilt forward/backward — useful when fitting into tight enclosures where the gland plate location forces an off-axis orientation. ## Mechanical life and operating cycle limits Rated for 10,000,000 mechanical operating cycles typical, with a maximum AC-3 switching frequency of 1,000 operations per hour. The 10 million cycle figure means this assembly outlasts most motor-driven loads in continuous process duty before contact wear becomes a factor. Vibration resistance is specified at 10.6 g / 5 ms and 6.3 g / 10 ms, which covers most industrial panel environments without additional damping. ## Termination and wiring — screw terminals throughout Main current circuit, auxiliary/control circuit, and magnet coil all use screw-type terminals — no spring-cage or push-in on this assembly. Fuse sizing for type 2 coordination requires gG NH 3NA, DIAZED 5SB, or NEOZED 5SE at 160 A. No auxiliary switch or bus communication module is fitted as standard — the product extension for auxiliary switch is listed as 'No' and bus communication as 'No'. ## Dimensions and panel clearance The assembly measures 180 mm high, 220 mm wide, and 244 mm deep.","metaTitle":"Siemens 3RA2444-8XF32-1AC2 SIRIUS Star-Delta Starter","metaDescription":"Siemens SIRIUS 3RA2444-8XF32-1AC2 star-delta contactor assembly, 55 kW at 400 V, 90 kW at 690 V. S3 size, screw terminals, DIN rail mount.","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":"3RA2444-8XF32-1AC2","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","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting 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":"55 kW","at 50 Hz rated value":"24 V","at 60 Hz rated value":"24 V","at 690 V rated value":"90 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":"3RT2035-1AC20","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","operating frequency at AC-3 maximum":"1 000 1/h","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","operating voltage at AC-3 rated value maximum":"690 V","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/2964b26f154761954748e1918fc63571.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=722800&mlfb=3RA2444-8XF32-1AC2"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for 3RA2444-8XF32-1AC2?","answer":"The substance prohibitance date is 03/01/2017, indicating RoHS/REACH compliance documentation is available from Siemens for this assembly. No UL, CSA, or IEC certification numbers are listed in the spec record, but the SIRIUS series typically carries IEC 60947-4-1 compliance — verify the specific certification markings on the nameplate for your jurisdiction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2444-8XF32-1AC2","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/3RA2444-8XF32-1AC2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:47:38.189Z","lastPublished":"2026-07-22T19:47:38.189Z","indexable":true}}