{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-3AN20","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-3AN20","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-3AN20","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-3AN20","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1025-3AN20, size S0 power contactor, 7.5 kW AC-2 at 400 V, 15.5 A AC-4, screw-type terminals, snap-on 35 mm DIN rail.","salesMarkdown":"The Siemens 3RT1025-3AN20 is a SIRIUS power contactor in the S0 frame size, rated for motor switching duty at 7.5 kW under AC-2 at 400 V and 15.5 A under AC-4 at 400 V. The main current circuit uses screw-type terminals, accepting 2x (0.25...2.5 mm²) solid or 2x (1...2.5 mm²) stranded, up to 2x 10 mm² maximum. For short-circuit protection, the coordination requirements are specified: Type 1 coordination calls for a gL/gG fuse rated 63 A; Type 2 coordination calls for a gL/gG fuse rated 25 A. These are the fuse ratings that ensure the contactor survives a fault without welding or excessive damage, depending on your coordination philosophy. The S0 frame measures 45 mm wide, 85 mm high, and 90 mm deep. Altitude derating applies above 2,000 m maximum operating altitude. The coil operates at 50/60 Hz with a rated control supply voltage of 220 V at 50 Hz and 220 V at 60 Hz — note it's a 220 V coil, not 24 V or 230 V, so verify your control voltage matches. Auxiliary contact ratings: 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V. These are the switching capacities for the built-in auxiliary contacts — useful for interlocking or status feedback to a PLC input.","metaTitle":"Siemens 3RT1025-3AN20 SIRIUS S0 Power Contactor, 7.5 kW AC-2","metaDescription":"Siemens SIRIUS 3RT1025-3AN20 power contactor, size S0, 7.5 kW AC-2 at 400 V, 15.5 A AC-4. Screw terminals, snap-on DIN rail. In current production.","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":"220 V","at 500 V rated value":"10 kW","at 60 Hz rated value":"220 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=309290&mlfb=3RT1025-3AN20","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-3AN20/alternatives.json"},"ai":{"faq":[{"question":"What are the key motor ratings for this contactor?","answer":"AC-2 at 400 V: 7.5 kW. AC-4 at 400 V: 15.5 A. AC-3 is not directly listed, but the AC-2 figure is the governing rating for slip-ring motor loads at 400 V."},{"question":"Does this contactor mount on standard DIN rail?","answer":"Yes, it mounts via screw and snap-on onto 35 mm standard mounting rail per DIN EN 50022."},{"question":"What is the depth of this contactor?","answer":"The depth is 90 mm."},{"question":"What wire sizes does the main terminal accept?","answer":"Screw-type terminals accept 2x (0.25...2.5 mm²) solid or 2x (1...2.5 mm²) stranded, up to 2x 10 mm² maximum. AWG equivalents: 2x (16...12) or 2x (14...10), 1x 8."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-3AN20","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/3RT1025-3AN20 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}}