{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1BW44-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1BW44-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1BW44-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1BW44-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, S0 frame, 3RT1025-1BW44-1AA0, screw-type terminals, 45 mm width, IP20 front, rated 11 kW at 690 V AC-3.","salesMarkdown":"The Siemens 3RT1025-1BW44-1AA0 is a SIRIUS power contactor in the S0 frame size — the middle footprint of the three SIRIUS contactor frames, sized for motor loads up to 11 kW at 690 V AC-3. The headline motor rating is 11 kW at 690 V AC-3 and 10 kW at 500 V AC-3. AC-3 is the standard duty for squirrel-cage induction motors — starting, running, and plugging. For resistive loads (AC-1) the thermal current is 10 A. The short-circuit coordination figures tell you what upstream fuse to spec: Type 2 coordination requires a 25 A gL/gG fuse; Type 1 coordination allows a 63 A gL/gG fuse. Type 2 means the contactor remains usable after a fault; Type 1 means it may need replacement but the fault is cleared. Main circuit terminals accept 2x (0.5…1.5 mm²), 2x (0.75…2.5 mm²), and up to 2x (0.75…4 mm²) solid, or 2x (1…2.5 mm²), 2x (2.5…6 mm²), and up to 2x 10 mm² stranded. AWG equivalents are 2x (16…12), 2x (14…10), and 1x 8. The coil holds at 48 V DC with a closing and holding power of 5.4 W DC. Side-by-side mounting is allowed with a 6 mm gap at the side — no derating penalty for packing contactors tight on the rail, but the panel builder should check the thermal curve above 40 °C.","metaTitle":"Siemens 3RT1025-1BW44-1AA0 SIRIUS Power Contactor, S0, 45 mm","metaDescription":"Siemens 3RT1025-1BW44-1AA0 SIRIUS power contactor, S0 frame, 45 mm wide. Screw terminals, IP20 front. Rated 11 kW at 690 V AC-3. Current lifecycle. 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=317974&mlfb=3RT1025-1BW44-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1BW44-1AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3RT1025-1BW44-1AA0 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at the time of quote — submit an RFQ for a firm price and lead time."},{"question":"What is the closest functional second-source for 3RT1025-1BW44-1AA0?","answer":"The peer 3RT1023-1AL20 is the same SIRIUS S0 frame and shares the same 45 mm width and DIN-rail mounting, but it carries a lower motor rating. The 3RT1025-1BW44-1AA0 is a higher-current variant in the same mechanical footprint, so a panel wired for the 3RT1023 may need a larger upstream fuse if swapped up. The 3RT1025-1AN24 is another S0 peer with a different coil voltage."},{"question":"What is 3RT1025-1BW44-1AA0's depth?","answer":"The depth is 150 mm. The width is 45 mm and height is 85 mm."},{"question":"What wire sizes does the 3RT1025-1BW44-1AA0 accept?","answer":"Solid conductors: 2x (0.5…1.5 mm²), 2x (0.75…2.5 mm²), max. 2x (0.75…4 mm²). Stranded: 2x (1…2.5 mm²), 2x (2.5…6 mm²), max. 2x 10 mm². AWG equivalents: 2x (16…12), 2x (14…10), 1x 8."},{"question":"Will 3RT1025-1BW44-1AA0 drop into a panel specified around 3RT1023-1AL20?","answer":"Yes, same S0 frame, same 45 mm width, same DIN-rail mounting. The terminal layout and footprint are identical. The difference is the higher motor rating on the 3RT1025 — verify the upstream fuse coordination if your panel was fused for the 3RT1023's lower rating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1BW44-1AA0","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/3RT1025-1BW44-1AA0 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}}