{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1BW44","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1BW44","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1BW44","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1BW44","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS S0 power contactor, 3RT1025-1BW44, 48 V DC coil, 11 kW at 690 V AC-3, screw terminals, IP20 front, current lifecycle.","salesMarkdown":"The Siemens 3RT1025-1BW44 is a SIRIUS S0-frame power contactor rated for motor switching at 11 kW at 690 V AC-3 and 10 kW at 500 V AC-3, with a 48 V DC coil. The S0 size keeps the footprint compact at 45 mm wide, 85 mm tall, and 150 mm deep — fits standard 35 mm DIN rail per EN 50022 via screw and snap-on mounting. ## Coil and switching characteristics The 48 V DC coil draws 5.4 W closing and holding power — a single-supply constant that simplifies the control transformer sizing. DC switching capability is specified per voltage: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, and 0.3 A at 220 V. For AC-4 duty at 400 V the contactor handles 15.5 A, and the AC-12 maximum operating current is 10 A. ## Coordination and wiring Type 1 coordination requires a 63 A gL/gG fuse; Type 2 coordination requires 25 A gL/gG. Main circuit terminals accept screw-type connections: solid conductors up to 2x 10 mm² or AWG 8, stranded up to 2x 4 mm². Auxiliary contacts are rated for the same 48 V DC coil circuit.","metaTitle":"Siemens 3RT1025-1BW44 SIRIUS S0 Power Contactor, 11 kW at 69","metaDescription":"Siemens 3RT1025-1BW44 SIRIUS S0 power contactor, 11 kW at 690 V AC-3, 48 V DC coil, screw terminals, IP20 front, current lifecycle. Quoted 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":"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 (0.5 ... 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=109728&mlfb=3RT1025-1BW44","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1BW44/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1025-1BW44 and how do I get a price?","answer":"The part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"Will 3RT1025-1BW44 drop into a panel that was specified around 3RT1023-1AL20 without rewiring?","answer":"Both are S0-frame SIRIUS contactors with the same 45 mm width and DIN-rail mounting, so the mechanical fit is identical. The coil voltage and terminal arrangement differ — verify the 48 V DC coil and screw-terminal wiring before substitution."},{"question":"What compliance documentation does this brand provide for 3RT1025-1BW44?","answer":"Siemens SIRIUS contactors are typically supplied with CE, UL, CSA, and CCC certifications, plus RoHS and REACH declarations. Specific documentation for this order code is available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1BW44","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/3RT1025-1BW44 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}}