{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2446-8XF32-1NB3","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2446-8XF32-1NB3","canonicalUrl":"https://aoctrl.com/siemens/3RA2446-8XF32-1NB3","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2446-8XF32-1NB3","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2446-8XF32-1NB3 contactor assembly for star-delta (wye-delta) start, 90 kW at 400 V AC-3, 132 kW at 690 V, size S3, screw-type terminals, DIN-rail mount.","salesMarkdown":"## What the assembly contains and how it mounts The 3RA2446-8XF32-1NB3: This is a factory-assembled star-delta starter built around two 3RT2046-1NB30 contactors and one 3RT2037-1NB30, plus a 3RA2943-2C RS assembly kit with a varistor surge suppressor across the coil. Dimensions are 180 mm high, 220 mm wide, and 244 mm deep — the depth is the dimension to watch when the panel door clearance is tight. ## Motor power and duty ratings Rated 90 kW at 400 V and 132 kW at 690 V in AC-3 duty — this is the motor-switching current the assembly handles under full-load starts, not just resistive heating. Maximum operating voltage is 690 V AC-3, and the coil control range is 20–33 V DC with a closing power draw of 154 W. The assembly is designed for a maximum of 850 switching operations per hour under AC-3 conditions, with a mechanical life of 10 million operations typical for the contactor size S3. ## Environmental limits and fuse coordination Operates from -25 to +60 °C and stores from -55 to +80 °C — the upper operating limit matters if the panel sits near a heat source or in a non-ventilated enclosure. For type 2 coordination the required upstream fuse is 160 A gG (NH 3NA, DIAZED 5SB, or NEOZED 5SE) — this is the fuse rating that clears a fault without damaging the starter. Vibration resistance is specified at 10.6 g / 5 ms and 6.3 g / 10 ms under AC conditions — relevant for installations on machinery or conveyors with periodic shock loads. Substance compliance date (RoHS/REACH) is noted as 03/01/2017 — the assembly meets the EU substance restrictions in effect from that date.","metaTitle":"Siemens 3RA2446-8XF32-1NB3 SIRIUS Star-Delta Starter","metaDescription":"Siemens 3RA2446-8XF32-1NB3 SIRIUS contactor assembly for star-delta starting, rated 90 kW at 400 V AC-3. Active production, sourced per 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","at DC":"20 ... 33 V","title":"3RA2446-8XF32-1NB3","Height":"180 mm","Upwards":"10 mm","Forwards":"10 mm","at 50 Hz":"0.95","at 60 Hz":"0.95","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 20-33 V AC/DC Size S3, screw terminal electrical and mechanical interlock 3 NO+3 NC, integrated varistor","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Screw-type terminals","at AC-3 maximum":"850 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":"90 kW","at 690 V rated value":"132 kW","Instantaneous Contact":"3","For Main Current Circuit":"screw-type terminals","1 Of The Supplied Contactor":"3RT2046-1NB30","2 Of The Supplied Contactor":"3RT2046-1NB30","3 Of The Supplied Contactor":"3RT2037-1NB30","at AC-3 rated value maximum":"690 V","Substance Prohibitance (Date)":"03/01/2017","Design Of The Surge Suppressor":"with varistor","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","closing power of magnet coil at DC":"154 W","holding power of magnet coil at DC":"5.6 W","At Contactor For Auxiliary Contacts":"Screw-type terminals","With Type Of Coordination 1 Required":"gG NH 3NA, DIAZED 5SB, NEOZED 5SE: 250 A","for 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","Contact Reliability Of Auxiliary Contacts":"< 1 error per 100 million operating cycles","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/DC","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":"$795.02","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/c0dc68dc289202aaae1e5e5ca6a8a075.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=629728&mlfb=3RA2446-8XF32-1NB3"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for 3RA2446-8XF32-1NB3?","answer":"The assembly carries a substance compliance date of 03/01/2017, indicating it meets RoHS and REACH requirements in effect from that date. Full declarations are available from Siemens on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2446-8XF32-1NB3","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/3RA2446-8XF32-1NB3 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}}