{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2446-8XF32-1AC2","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2446-8XF32-1AC2","canonicalUrl":"https://aoctrl.com/siemens/3RA2446-8XF32-1AC2","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2446-8XF32-1AC2","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2446-8XF32-1AC2 star-delta (wye-delta) contactor assembly, 90 kW at 400 V, 220 mm width, 180 mm height, 244 mm depth, screw and snap-on mounting on 35 mm DIN rail.","salesMarkdown":"## What this star-delta assembly delivers The 3RA2446-8XF32-1AC2 is a pre-assembled SIRIUS star-delta contactor combination for wye-delta starting of three-phase motors. It ships with two 3RT2046-1AC20 contactors for the line and delta legs and one 3RT2037-1AC20 for the star leg, plus the interlocking RS assembly kit 3RA2943-2C. ## Mounting and panel fit The 220 mm width and 244 mm depth mean it occupies roughly a 9-inch wide footprint on the rail — plan the enclosure backplate accordingly. Mounting position is flexible: the assembly can be rotated ±180° on a vertical surface, and tilted forward/backward ±22.5°. Minimum clearances around the unit are 10 mm upwards, forwards, downwards, and to the sides, with 0 mm clearance needed at the rear. The contactor size is S3, with a typical mechanical life of 10 million operating cycles. ## Wiring and protection requirements Auxiliary and control circuits also use screw terminals. Upstream short-circuit protection requires a 160 A fuse — gG NH 3NA, DIAZED 5SB, or NEOZED 5SE types are specified. Maximum switching frequency in AC-3 duty is 850 operations per hour — sufficient for most starting applications but a constraint for high-cycle jogging or inching. ## Environmental and compliance The assembly withstands vibration at 10.6 g / 5 ms and 6.3 g / 10 ms (AC rating). RoHS compliance effective from 03/01/2017 — the assembly meets EU substance restrictions for new installations.","metaTitle":"Siemens 3RA2446-8XF32-1AC2 SIRIUS Star-Delta Starter, 90 kW","metaDescription":"Siemens 3RA2446-8XF32-1AC2 SIRIUS star-delta (wye-delta) contactor assembly, 90 kW at 400 V, 220 mm width, DIN rail mount. Active production, quoted to order.","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":"3RA2446-8XF32-1AC2","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, 90 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":"90 kW","at 50 Hz rated value":"24 V","at 60 Hz rated value":"24 V","at 690 V rated value":"132 kW","Instantaneous Contact":"3","For Main Current Circuit":"screw-type terminals","1 Of The Supplied Contactor":"3RT2046-1AC20","2 Of The Supplied Contactor":"3RT2046-1AC20","3 Of The Supplied Contactor":"3RT2037-1AC20","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":"850 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/67a247b5383553bb0798ef4b41233398.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629725&mlfb=3RA2446-8XF32-1AC2"},"ai":{"faq":[{"question":"What is the 3RA2446-8XF32-1AC2's panel footprint?","answer":"The assembly measures 220 mm wide, 180 mm high, and 244 mm deep. It mounts on a 35 mm DIN rail with 10 mm clearance required on all sides except the rear (0 mm needed)."},{"question":"What contactors are included in the 3RA2446-8XF32-1AC2 assembly?","answer":"It ships with two 3RT2046-1AC20 contactors (line and delta) and one 3RT2037-1AC20 (star), plus the 3RA2943-2C RS assembly kit for mechanical interlocking."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2446-8XF32-1AC2","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/3RA2446-8XF32-1AC2 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}}