{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1BP44","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1BP44","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1BP44","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1BP44","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, size S0, 3RT1025-1BP44, 230 V AC coil, screw terminals, 7.5 kW at AC-2 400 V, 45 mm width, IP20 front.","salesMarkdown":"The coil is 230 V AC, with a closing and holding power of 5.4 W DC, so the control transformer needs to cover that draw. ## Motor switching and contact ratings At 500 V it handles 10 kW and at 690 V it handles 11 kW, so it can serve 690 V line applications up to that power. The auxiliary contact block carries two instantaneous contacts rated at 10 A at 24 V, 6 A at 230 V, and 0.3 A at 220 V DC. That covers signalling and interlocking in the control circuit. ## Short-circuit coordination and environment With type 2 coordination, the required fuse is gL/gG 25 A; with type 1 coordination it's 63 A. That dictates the upstream protection selection for the motor branch circuit. Side-by-side mounting is permitted, which saves rail space when ganging multiple contactors.","metaTitle":"Siemens 3RT1025-1BP44 SIRIUS Power Contactor, S0, 230V AC","metaDescription":"Siemens 3RT1025-1BP44 SIRIUS power contactor, size S0. 230V AC coil. 7.5 kW at AC-2 400V. DIN rail mount. Current production. 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":"230 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=145257&mlfb=3RT1025-1BP44","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1BP44/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings of the 3RT1025-1BP44?","answer":"The key ratings are: 7.5 kW at AC-2 400 V, 15.5 A at AC-4 400 V, 10 kW at 500 V, 11 kW at 690 V, with a 230 V AC coil. It has two auxiliary contacts rated at 10 A at 24 V."},{"question":"Where can I buy the 3RT1025-1BP44?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"Will 3RT1025-1BP44 drop into a panel specified around 3RT1023-1AL20 without rewiring?","answer":"Both are SIRIUS S0 frame contactors with the same 45 mm width and DIN rail mounting, so the mechanical fit is the same. However, the coil voltage and auxiliary contact configuration differ, so verify the control circuit wiring matches this 230 V AC coil."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1BP44","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/3RT1025-1BP44 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}}