{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1BD40-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1BD40-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1BD40-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1BD40-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS, power contactor, 3RT1025-1BD40-1AA0, S0 frame, 15.5 A AC-4 at 400 V, 11 kW at 690 V, screw terminals, IP20 front, current lifecycle.","salesMarkdown":"## Siemens SIRIUS 3RT1025-1BD40-1AA0 — Power Contactor, S0 Frame Rated for AC-4 duty at 15.5 A at 400 V, this contactor handles the severe switching conditions of reversing or inching motor starts where the contacts close under full load. At higher line voltages, the motor power rating reaches 10 kW at 500 V and 11 kW at 690 V, making it suitable for 690 V distribution systems common in mining, marine, and heavy industrial installations. Auxiliary contacts are rated for 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V — enough for PLC inputs or indicator lamps on the same panel. Side-by-side mounting allowed; 6 mm clearance recommended. Screw terminals accept solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). For stranded wire: 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), max 2x 10 mm². AWG equivalents: 2x (16 to 12), 2x (14 to 10), 1x 8. Strip length and torque values follow standard Siemens S0 practice. IP20 on the front protects against finger contact; the terminals themselves are IP00, so the contactor must be installed inside a panel or enclosure with a higher overall IP rating.","metaTitle":"Siemens SIRIUS 3RT1025-1BD40-1AA0 Power Contactor, S0, 15.5","metaDescription":"Siemens SIRIUS 3RT1025-1BD40-1AA0 power contactor, S0 frame, 15.5 A AC-4 at 400 V, 11 kW at 690 V. Current lifecycle. Screw terminals, DIN rail. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"101 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":"42 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":"0","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=444452&mlfb=3RT1025-1BD40-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1BD40-1AA0/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation is available for this contactor?","answer":"As a Siemens SIRIUS product, the 3RT1025-1BD40-1AA0 carries CE marking for the European market and is designed to meet IEC/EN 60947-4-1 standards for contactors and motor starters. UL/CSA listings are typical for the SIRIUS line; confirm the specific certification on the unit label or request the declaration of conformity with your RFQ."},{"question":"What wire sizes does the 3RT1025-1BD40-1AA0 accept?","answer":"Solid conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded: 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), max 2x 10 mm². AWG: 2x (16 to 12), 2x (14 to 10), 1x 8."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1BD40-1AA0","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/3RT1025-1BD40-1AA0 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}}