{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RA2425-8XF32-1BB4","brand":"Siemens","brandSlug":"siemens","productSlug":"3RA2425-8XF32-1BB4","canonicalUrl":"https://aoctrl.com/siemens/3RA2425-8XF32-1BB4","factsUrl":"https://aoctrl.com/api/mcp/products/3RA2425-8XF32-1BB4","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RA2425-8XF32-1BB4 star-delta contactor assembly, S0 size, 15 kW at 400 V AC-3, 3RT2026-1BB40 + 3RT2024-1BB40 contactors, screw terminals, 35 mm DIN rail.","salesMarkdown":"## Star-delta assembly for 15 kW motor starting The Siemens 3RA2425-8XF32-1BB4 is a factory-assembled SIRIUS star-delta contactor assembly for wye-delta starting of three-phase motors. It ships with two 3RT2026-1BB40 contactors and one 3RT2024-1BB40 contactor, plus the RS assembly kit 3RA2923-2BB1 — everything needed for the transition from star to delta is integrated on the mounting plate. The S0 contactor frame size keeps the assembly compact — 135 mm wide, 101 mm high, 181 mm deep — fitting standard 35 mm DIN rail with screw and snap-on fastening. ## Motor power ratings and duty cycle The 15 kW rating at 400 V AC-3 is the headline figure for standard 400 V mains — this is the motor power the assembly can switch under starting duty. Maximum switching rate under AC-3 duty is 1,000 operations per hour, with a mechanical life of 10 million cycles typical for the contactors. The coil closing power at DC is 13.8 W, and the coil terminals are screw-type — no special control voltage wiring beyond standard 24 V DC. ## Mounting and wiring constraints Clearance requirements: 6 mm upwards, forwards, downwards, and to the side, with 0 mm backwards — the assembly can sit flush against the back panel. All terminals are screw-type — no spring-cage tooling required.","metaTitle":"Siemens 3RA2425-8XF32-1BB4 SIRIUS Star-Delta Starter","metaDescription":"Siemens 3RA2425-8XF32-1BB4 SIRIUS star-delta contactor assembly, 15 kW at 400 V AC-3, S0 size, screw terminals, DIN rail mount.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Motor Starters"],"specifications":{"Depth":"181 mm","Solid":"2x (1 ... 2.5 mm²), 2x (2.5 ... 10 mm²)","Width":"135 mm","at AC":"11,8g / 5 ms, 7,4g / 10 ms","at DC":"15g / 5 ms, 10g / 10 ms","title":"3RA2425-8XF32-1BB4","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 AC-3, 15/18.5 kW/400 V, 24 V DC 3-pole, Size S0 screw terminal 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":"15 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":"3RT2026-1BB40","2 Of The Supplied Contactor":"3RT2026-1BB40","3 Of The Supplied Contactor":"3RT2024-1BB40","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: 35 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: 100 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":"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/04e93ee55586d8c1d416c1400f5e2760.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=90924&mlfb=3RA2425-8XF32-1BB4"},"ai":{"faq":[{"question":"What contactors are included in the 3RA2425-8XF32-1BB4 assembly?","answer":"The assembly ships with two 3RT2026-1BB40 contactors and one 3RT2024-1BB40 contactor, plus the RS assembly kit 3RA2923-2BB1. All three contactors are screw-terminal type."},{"question":"What is the motor power rating of 3RA2425-8XF32-1BB4 at 400 V?","answer":"The maximum AC-3 operating voltage is 690 V."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RA2425-8XF32-1BB4","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/3RA2425-8XF32-1BB4 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}}