{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1AU00","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1AU00","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1AU00","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1AU00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, 3RT1025-1AU00, S0 size, 3 NO main contacts, 45 mm width, screw terminals, AC-2 7.5 kW at 400 V, AC-4 15.5 A at 400 V.","salesMarkdown":"The Siemens 3RT1025-1AU00 is a SIRIUS S0 power contactor with three normally-open main contacts, screw-type terminals, and a 45 mm wide housing that snaps onto a 35 mm DIN rail per DIN EN 50022. It switches motor loads in control panels — the AC-2 rating of 7.5 kW at 400 V covers slip-ring motors, and the AC-4 rating of 15.5 A at 400 V handles reversing or inching duty where the contactor makes and breaks full load current. The 91 mm depth and 85 mm height fit standard enclosure backplates; side-by-side mounting is allowed with a 6 mm gap to adjacent devices for thermal clearance. The 24 V coil draws 10 A at rated voltage — that's the inrush for the solenoid, not the continuous hold current, so size the control transformer for the peak. Wire termination accepts solid or stranded: 2x (0.5…1.5 mm²) and 2x (0.75…2.5 mm²) for control wiring, and up to 2x 10 mm² or 1x 8 AWG for the main power circuit — enough for the motor leads this contactor typically serves. Rated operational current at AC-12 (control-circuit duty) is 10 A maximum; the auxiliary contact block you add must stay within that limit.","metaTitle":"Siemens 3RT1025-1AU00 SIRIUS Power Contactor, 3 NO, 45 mm","metaDescription":"Siemens 3RT1025-1AU00 SIRIUS power contactor, S0 size, 3 NO main contacts, 45 mm width, screw terminals, DIN rail mount. AC-2 7.5 kW / AC-4 15.5 A at 400 V. Current lifecycle stage","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"91 mm","Solid":"2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)","Width":"45 mm","Height":"85 mm","Maximum":"2 000 m","at 50 Hz":"0.8 ... 1.1","At The Side":"6 mm","On The Front":"IP20","1 Rated Value":"50 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":"240 V","at 500 V rated value":"10 kW","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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)","Number of poles for main current circuit":"3","at AWG conductors for auxiliary contacts":"2x (20 ... 16), 2x (18 ... 14), 1x 12","Contact reliability of auxiliary contacts":"1 faulty switching per 100 million (17 V, 1 mA)","For Auxiliary And Control Current Circuit":"screw-type terminals","at ambient temperature 40 °C rated value":"40 A","Apparent holding power of magnet coil at AC":"7.8 V·A","Apparent pick-up power of magnet coil at AC":"61 V·A","Type of voltage of the control supply voltage":"AC","Inductive power factor with closing power of the coil":"0.82","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=483117&mlfb=3RT1025-1AU00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1AU00/alternatives.json"},"ai":{"faq":[{"question":"What is the depth of 3RT1025-1AU00?","answer":"The depth is 91 mm, which fits standard enclosure backplates."},{"question":"What wire sizes does 3RT1025-1AU00 accept?","answer":"Control wiring accepts 2x (0.5…1.5 mm²) or 2x (0.75…2.5 mm²); main power terminals accept up to 2x 10 mm² or 1x 8 AWG."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1AU00","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/3RT1025-1AU00 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}}