{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1BG44-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1BG44-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1BG44-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1BG44-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S0 power contactor, 3RT1025-1BG44-1AA0, screw-type terminals, 45 mm width, IP20 front, rated 11 kW at 690 V AC-3.","salesMarkdown":"At 500 V it carries 10 kW, and at 400 V in AC-2 duty (slip-ring motors or resistive-inductive mixed loads) it manages 7.5 kW. For high-inrush reversing or plugging duty (AC-4), the rating is 15.5 A at 400 V — a lower figure that governs frequent jogging or inching applications. The DC coil draws 5.4 W on pickup and holds at the same 5.4 W — a continuous-duty solenoid that stays cool in a sealed panel. The IP20 front face protects against finger contact; the terminal area is rated IP00, meaning the wiring compartment expects enclosure protection from the panel. ## Coordination and wiring — what the protection specs tell you For a motor branch circuit, the 25 A fuse is the safer choice — it limits let-through energy and keeps the contactor in service after a fault. Main circuit terminals accept 2x (0.5 to 1.5 mm²) solid, 2x (0.75 to 2.5 mm²) stranded, or up to 2x 4 mm² max. For AWG, that's 2x (16 to 12) solid, 2x (14 to 10) stranded, or 1x 8 AWG. The auxiliary contact block (2 instantaneous contacts) shares the same terminal range. Side-by-side mounting is permitted with 6 mm spacing — no derating required for adjacent units at rated load.","metaTitle":"Siemens 3RT1025-1BG44-1AA0 SIRIUS S0 Power Contactor, 11 kW","metaDescription":"Siemens SIRIUS S0 power contactor 3RT1025-1BG44-1AA0, rated 11 kW at 690 V AC-3. Screw terminals, IP20 front, current lifecycle. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"150 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 The Side":"6 mm","Rated Value":"125 V","On The Front":"IP20","Initial Value":"0.8","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","Full-scale value":"1.1","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 500 V rated value":"10 kW","at 690 V rated value":"11 kW","Instantaneous Contact":"2","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","Closing power of magnet coil at DC":"5.4 W","Holding power of magnet coil at DC":"5.4 W","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","Type of voltage of the control supply voltage":"DC","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=445469&mlfb=3RT1025-1BG44-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1BG44-1AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1025-1BG44-1AA0 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time."},{"question":"What are the key ratings for 3RT1025-1BG44-1AA0?","answer":"Rated 11 kW at 690 V AC-3, 10 kW at 500 V AC-3, and 7.5 kW at 400 V AC-2. The AC-4 rating is 15.5 A at 400 V. Coil holds at 5.4 W DC, operating temperature -25 to +60 °C, IP20 front."},{"question":"What is the depth of 3RT1025-1BG44-1AA0?","answer":"The depth is 150 mm, with a width of 45 mm and height of 85 mm — a compact S0 frame that fits standard DIN-rail enclosures."},{"question":"What wire sizes does the 3RT1025-1BG44-1AA0 accept?","answer":"Main terminals accept 2x (0.5 to 1.5 mm²) solid, 2x (0.75 to 2.5 mm²) stranded, up to 2x 4 mm² max. AWG equivalents: 2x (16 to 12) solid, 2x (14 to 10) stranded, 1x 8 AWG."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1BG44-1AA0","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/3RT1025-1BG44-1AA0 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}}