{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2426-8XF32-2BB4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2426-8XF32-2BB4","canonicalUrl":"https://aoctrl.com/siemens/3RA2426-8XF32-2BB4","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2426-8XF32-2BB4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2426-8XF32-2BB4, a pre-assembled star-delta contactor assembly, S0 size, 24 V DC coil, rated 22 kW at 400 V AC-3, with spring-loaded terminals and snap-on DIN rail mount.","salesMarkdown":"The Siemens SIRIUS 3RA2426-8XF32-2BB4 is a factory-assembled star-delta (wye-delta) contactor assembly — three contactors and an RS kit on a common mounting plate, wired and ready to drop into a panel. It's sized for S0 contactors, so it handles motor loads up to 22 kW at 400 V AC-3, 19 kW at 500 V or 690 V. The 24 V DC coil means it's a low-voltage-control part, common on PLC-driven or safety-relay circuits. The AC-3 maximum operating voltage of 690 V tells you this assembly can switch motors on 400 V, 500 V, or 690 V three-phase systems — the power ratings drop at higher voltages because of the current derating, but the contactor's insulation class handles the full range. The 24 V DC coil is a common control voltage; the spring-loaded terminals on both the main and auxiliary circuits mean no screwdriver torque checks, just strip and push. The assembly comes with three specific contactors: two 3RT2027-2BB40 units for the line and delta legs, and one 3RT2026-2BB40 for the star leg, plus the RS bridging kit 3RA2923-2BB2. That means the wiring between contactors is already done — you land your motor and line cables at the spring terminals and connect the 24 V DC control wiring. That's handy when you're squeezing it into a crowded panel and need to angle it for cable access. The S0 footprint is 135 mm wide, 114 mm tall, 181 mm deep, so it fits a standard 200 mm deep enclosure. This part is in the current lifecycle stage — still an active catalog number from Siemens, no end-of-life notice on record. That means you can spec it into a BOM without worrying about a last-time-buy window closing.","metaTitle":"Siemens 3RA2426-8XF32-2BB4 SIRIUS Contactor Assembly","metaDescription":"Siemens SIRIUS 3RA2426-8XF32-2BB4 star-delta contactor assembly, 24 V DC coil, rated 22 kW at 400 V AC-3. S0 size, spring terminals, snap-on DIN rail.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"181 mm","Solid":"2x (1 ... 10 mm²)","Width":"135 mm","at AC":"13,5g / 5 ms, 8,3g / 10 ms","at DC":"15g / 5 ms, 10g / 10 ms","title":"3RA2426-8XF32-2BB4","Height":"114 mm","Upwards":"6 mm","Forwards":"6 mm","Backwards":"0 mm","Downwards":"6 mm","At The Side":"6 mm","description":"Contactor assembly for star-delta (wye-delta) start AC-3, 22 kW/400 V,24 V DC 3-pole, Size S0 Spring-type terminal electrical and mechanical interlock 3 NO + 3 NC integrated","During Storage":"-55 ... +80 °C","Of Magnet Coil":"Spring-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":"S0","Solid Or Stranded":"2x (0.5 ... 2.5 mm²)","at DC rated value":"24 V","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":"22 kW","at 500 V rated value":"19 kW","at 690 V rated value":"19 kW","Instantaneous Contact":"3","For Main Current Circuit":"spring-loaded terminals","1 Of The Supplied Contactor":"3RT2027-2BB40","2 Of The Supplied Contactor":"3RT2027-2BB40","3 Of The Supplied Contactor":"3RT2026-2BB40","at AC-3 rated value maximum":"690 V","Substance Prohibitance (Date)":"10/01/2009","of the supplied RS assembly kit":"3RA2923-2BB2","For Auxiliary And Control Circuit":"spring-loaded terminals","Product Extension Auxiliary Switch":"No","Product Function Bus Communication":"No","With Type Of Assignment 2 Required":"gG NH 3NA, DIAZED 5SB, NEOZED 5SE: 50 A","closing power of magnet coil at DC":"13.8 W","holding power of magnet coil at DC":"13.8 W","At Contactor For Auxiliary Contacts":"Spring-type terminals","With Type Of Coordination 1 Required":"gG NH 3NA, DIAZED 5SB, NEOZED 5SE: 125 A","at AWG cables for auxiliary contacts":"2x (20 ... 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)","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 (0.5 ... 1.5 mm²)","protocol is supported AS-Interface protocol":"No","with high demand rate according to SN 31920":"75 %","Type Of Voltage Of The Control Supply Voltage":"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":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/13dc64910c457694bea36961809c2421.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=282190&mlfb=3RA2426-8XF32-2BB4"},"ai":{"faq":[{"question":"Is 3RA2426-8XF32-2BB4 suitable for star-delta starting?","answer":"Yes, it is a pre-assembled star-delta (wye-delta) contactor assembly, designed specifically for that starting method."},{"question":"What is the difference between 3RA2426-8XF32-2BB4 and 3RA2426-8XF32-2BB3?","answer":"The evidence does not contain specifications for the -2BB3 variant, so a direct comparison cannot be made from this record. The -2BB4 carries a 24 V DC coil and S0-size contactors."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2426-8XF32-2BB4","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/3RA2426-8XF32-2BB4 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}}