{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-3AL20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-3AL20","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-3AL20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-3AL20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S0, 3RT1025-3AL20, 45 mm width, screw terminals, 7.5 kW at 400 V AC-2, 35 mm DIN rail mount.","salesMarkdown":"Panel builders can land screw-type terminals on the main circuit — accepts 2x (0.25...2.5 mm²) solid or up to 2x 10 mm² stranded, with AWG equivalents 2x (16...12) or 1x 8. ## Motor duty and coordination In AC-2 duty (slip-ring motors, wound-rotor) at 400 V, the contactor switches 7.5 kW. For AC-4 (plugging, inching) the same voltage yields 15.5 A. The S0 frame keeps the width at 45 mm — fits standard panel layouts without crowding. Type 2 coordination requires a 25 A gL/gG fuse; Type 1 allows 63 A. Pollution degree 3 suits industrial environments with conductive deposits. The built-in auxiliary contact block handles 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V — enough for PLC inputs or small relays. At 220 V DC the rating drops to 0.3 A, so confirm DC load current before wiring.","metaTitle":"Siemens 3RT1025-3AL20 SIRIUS Power Contactor, 45 mm, 7.5 kW","metaDescription":"Siemens 3RT1025-3AL20 SIRIUS power contactor, size S0, 45 mm width, 7.5 kW at 400 V AC-2, screw terminals, 35 mm DIN rail mount. Active production, available to order. Request a qu","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"90 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"85 mm","Maximum":"2 000 m","at 50 Hz":"0.8 ... 1.1","at 60 Hz":"0.85 ... 1.1","At The Side":"6 mm","On The Front":"IP20","1 Rated Value":"50 Hz","2 Rated Value":"60 Hz","Mounting type":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Of The Terminal":"IP00","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Size of contactor":"S0","Product brand name":"SIRIUS","Degree of pollution":"3","Product designation":"power contactor","at 24 V rated value":"10 A","at 60 V rated value":"2 A","Of Contactor Typical":"10 000 000","at 110 V rated value":"1 A","at 220 V rated value":"0.3 A","at 230 V rated value":"6 A","at 400 V rated value":"3 A","at 50 Hz rated value":"230 V","at 500 V rated value":"10 kW","at 60 Hz rated value":"230 V","at 690 V rated value":"11 kW","Instantaneous Contact":"0","Side-by-side mounting":"Yes","For Main Current Circuit":"screw-type terminals","Single Or Multi-Stranded":"2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 mm²","at AC-2 at 400 V rated value":"7.5 kW","at AC-4 at 400 V rated value":"15.5 A","Operating current at AC-12 maximum":"10 A","With Type Of Assignment 2 Required":"fuse gL/gG: 25 A","at AWG conductors for main contacts":"2x (16 ... 12), 2x (14 ... 10), 1x 8","With Type Of Coordination 1 Required":"fuse gL/gG: 63 A","Reference code acc. to DIN EN 81346-2":"Q","Number of NC contacts for main contacts":"0","Number of NO contacts for main contacts":"3","Finely Stranded With Core End Processing":"2x (0.25 ... 1.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (24 ... 14)","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"spring-loaded terminals","at ambient temperature 40 °C rated value":"40 A","Apparent holding power of magnet coil at AC":"8.4 V·A","Apparent pick-up power of magnet coil at AC":"64 V·A","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Type of voltage of the control supply voltage":"AC","Inductive power factor with closing power of the coil":"0.72","Inductive power factor with the holding power of the coil":"0.24","Of The Contactor With Added Auxiliary Switch Block Typical":"10 000 000","For Short-Circuit Protection Of The Auxiliary Switch Required":"fuse gL/gG: 10 A","Of The Contactor With Added Electronics-Compatible Auxiliary Switch Block Typical":"5 000 000"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=256301&mlfb=3RT1025-3AL20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-3AL20/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1025-3AL20 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ. Send your quantity and target price — we confirm availability and current pricing at quote time."},{"question":"Will 3RT1025-3AL20 drop into a panel that was specified around 3RT1023-1AL20 without rewiring?","answer":"The 3RT1025-3AL20 shares the same S0 frame (45 mm width) and DIN-rail mounting as the 3RT1023-1AL20, but verify the auxiliary contact configuration and coil voltage — the 3RT1025-3AL20 carries a 10 A rated auxiliary contact at 24 V, which may differ from the 3RT1023-1AL20's auxiliary rating."},{"question":"What is 3RT1025-3AL20's listed depth (90 mm) on this component line?","answer":"The depth is 90 mm."},{"question":"What is 3RT1025-3AL20's listed solid (2x (0.25... 2.5 mm²)) on this component line?","answer":"The solid conductor capacity is 2x (0.25... 2.5 mm²)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-3AL20","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/3RT1025-3AL20 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}