{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2426-8XH32-1BB4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2426-8XH32-1BB4","canonicalUrl":"https://aoctrl.com/siemens/3RA2426-8XH32-1BB4","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2426-8XH32-1BB4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2426-8XH32-1BB4 star-delta contactor assembly, Size S0, 22 kW at 400 V AC-3, screw-type terminals, 35 mm DIN rail mount.","salesMarkdown":"## Star-delta contactor assembly — what ships inside The 3RA2426-8XH32-1BB4 is a Siemens SIRIUS pre-assembled star-delta (wye-delta) contactor set for reduced-voltage starting of three-phase motors. It ships with three contactors: two 3RT2027-1BB40-0CC0 units and one 3RT2026-1BB40, plus the RS assembly kit 3RA2923-2BB1. ## Mounting and panel fit Size S0 frame, 135 mm wide × 101 mm high × 181 mm deep. Clearance around the unit: 6 mm upwards, forwards, downwards, and to the side; 0 mm backwards (the DIN rail face). The 181 mm depth means the assembly protrudes well into the enclosure — budget for gland-plate clearance and cable bend radius behind the door. ## Termination and wiring All connections — main current circuit, auxiliary/control circuit, and magnet coil — use screw-type terminals. Main circuit accepts solid conductors: 2× (1…2.5 mm²) and 2× (2.5…10 mm²). The manufacturer specifies gG NH 3NA, DIAZED 5SB, or NEOZED 5SE fuses at 50 A for type 2 coordination — this is the short-circuit protection rating that keeps the starter operational after a fault, not just safe. Wire the line side through these fuses before the contactor assembly. ## Environmental and mechanical limits The 60 °C ceiling is typical for enclosed panels — above that, derate the continuous current per the SIRIUS application manual. Shock resistance: 13.5 g / 5 ms and 8.3 g / 10 ms on AC; 15 g / 5 ms and 10 g / 10 ms on DC. Mechanical life of the typical contactor is 10 million operations. Maximum switching rate in AC-3 is 1,000 operations per hour — above that the contact erosion accelerates and the thermal capacity of the arc chamber becomes the limiting factor. ## Lifecycle and sourcing The magnet coil draws 13.8 W at DC rated value of 24 V — confirm the control transformer sizing if multiple starters share a common DC supply. Substance prohibitance date is 10/01/2009, aligning with RoHS compliance.","metaTitle":"Siemens 3RA2426-8XH32-1BB4 SIRIUS Star-Delta Starter, 22 kW","metaDescription":"Siemens 3RA2426-8XH32-1BB4 SIRIUS star-delta contactor assembly, 22 kW at 400 V, AC-3. Active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"NRND","categoryPath":["Motor Starters"],"specifications":{"Depth":"181 mm","Solid":"2x (1 ... 2.5 mm²), 2x (2.5 ... 10 mm²)","Width":"135 mm","at AC":"13,5g / 5 ms, 8,3g / 10 ms","at DC":"15g / 5 ms, 10g / 10 ms","title":"3RA2426-8XH32-1BB4","Height":"101 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, AS-i AC-3, 22 kW/400 V, 24 V DC 3-pole, size S0 screw terminals electrical and mechanical interlock 3 NO + 3 NC integrated","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":"S0","Solid Or Stranded":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 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":"screw-type terminals","1 Of The Supplied Contactor":"3RT2027-1BB40-0CC0","2 Of The Supplied Contactor":"3RT2027-1BB40","3 Of The Supplied Contactor":"3RT2026-1BB40","at AC-3 rated value maximum":"690 V","Substance Prohibitance (Date)":"10/01/2009","of the supplied RS assembly kit":"3RA2923-2BB1","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: 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":"Screw-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 ... 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 %","protocol is supported AS-Interface protocol":"Yes","with high demand rate according to SN 31920":"75 %","Type Of Voltage Of The Control Supply Voltage":"DC","Of The Supplied Function Module For Communication":"3RA2712-1CA00","contact rating of auxiliary contacts according to UL":"A600 / Q600","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/203f9a6bc203a50fa841fd162dfea7ed.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=231897&mlfb=3RA2426-8XH32-1BB4"},"ai":{"faq":[{"question":"What compliance documentation does Siemens provide for 3RA2426-8XH32-1BB4?","answer":"The substance prohibitance date of 10/01/2009 indicates RoHS compliance. Standard Siemens documentation includes the CE declaration and the SIRIUS system manual covering IEC/EN 60947-4-1."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2426-8XH32-1BB4","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/3RA2426-8XH32-1BB4 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-21T00:35:51.660Z","lastPublished":"2026-07-21T00:35:51.660Z","indexable":true}}