{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-3BW44","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-3BW44","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-3BW44","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-3BW44","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1025-3BW44 power contactor, size S0, screw-type terminals, 10 kW at 500 V AC-3, 11 kW at 690 V AC-3, snap-on DIN rail mount.","salesMarkdown":"Its motor-switching capacity is rated at 10 kW at 500 V AC-3 and 11 kW at 690 V AC-3 — the AC-3 duty class covers starting and stopping squirrel-cage motors, which is the majority of conveyor, pump, and fan applications. For less demanding loads, AC-2 at 400 V is rated at 7.5 kW, and for reversing or inching duty (AC-4), it handles 15.5 A at 400 V. The contactor is also rated for AC-12 switching at 10 A maximum. The DC magnet coil draws 5.4 W both on closing and holding — a steady-state power that simplifies the control transformer sizing. The S0 frame occupies 45 mm width, 85 mm height, and 150 mm depth — a standard footprint that fits alongside other SIRIUS S0 components on the same DIN rail. Side-by-side mounting is permitted, so multiple contactors can pack tightly in the enclosure. Main circuit wiring uses screw-type terminals accepting solid or stranded conductors: 2x (0.25 to 2.5 mm²), 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or up to 2x 10 mm². AWG equivalents are 2x (16 to 12), 2x (14 to 10), and 1x 8. For short-circuit coordination, the contactor requires a gL/gG fuse: 25 A for Type 2 coordination (minimal damage to the contactor) and 63 A for Type 1 coordination (contactor may need replacement after a fault).","metaTitle":"Siemens 3RT1025-3BW44 SIRIUS Power Contactor, 10 kW at 500 V","metaDescription":"Siemens SIRIUS 3RT1025-3BW44 power contactor, size S0, 10 kW at 500 V, 11 kW at 690 V. Active production. Screw terminals, DIN rail mount. IP20 front.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"150 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"85 mm","Maximum":"2 000 m","At The Side":"6 mm","Rated Value":"48 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 (0.25 ... 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","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","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=191531&mlfb=3RT1025-3BW44","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-3BW44/alternatives.json"},"ai":{"faq":[{"question":"What are the key motor power ratings for this contactor?","answer":"It is rated for 10 kW at 500 V AC-3, 11 kW at 690 V AC-3, and 7.5 kW at 400 V AC-2. For AC-4 duty (reversing/inching), it handles 15.5 A at 400 V."},{"question":"What is the physical size of the 3RT1025-3BW44?","answer":"It is a size S0 frame: 45 mm wide, 85 mm high, and 150 mm deep. It mounts on a 35 mm DIN rail per EN 50022."},{"question":"What wire sizes does the screw terminal accept?","answer":"Main circuit terminals accept solid or stranded conductors from 2x 0.25 mm² up to 2x 10 mm², or AWG equivalents from 2x 16 to 1x 8."},{"question":"What short-circuit protection fuse rating is required?","answer":"For Type 2 coordination, use a 25 A gL/gG fuse. For Type 1 coordination, a 63 A gL/gG fuse is specified."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-3BW44","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/3RT1025-3BW44 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}}