{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-3BD40-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-3BD40-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-3BD40-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-3BD40-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, Size S0, 3RT1025-3BD40-1AA0, 45 mm width, screw-type terminals, 24 VDC coil, rated 11 kW at 690 V AC-3, IP20 front.","salesMarkdown":"The coil holds at 24 VDC nominal; verify the DC supply can deliver the 5.4 W without droop under load. Rated for motor duty at 10 kW at 500 V and 11 kW at 690 V in AC-3 category, and 7.5 kW at 400 V in AC-2. ## Mounting and integration — DIN rail, side-by-side, clearance The IP20 front protection means the contactor is safe for finger contact from the front in a closed panel; the terminals themselves carry IP00, so live parts are exposed until the terminal shrouds are fitted. Screw-type terminals on the main circuit accept 2x (0.25 to 2.5 mm²) solid or 2x (1 to 2.5 mm²) stranded, with a maximum of 2x 10 mm². For AWG, that translates to 2x (16 to 12) solid or 2x (14 to 10) stranded, with a single 8 AWG maximum. Strip length and torque values follow the terminal marking on the contactor. ## Coordination and protection — fuse sizing These values assume the standard assignment per IEC 60947-4-1. ## Operating conditions and lifecycle","metaTitle":"Siemens 3RT1025-3BD40-1AA0 SIRIUS Power Contactor, Size S0,","metaDescription":"Siemens 3RT1025-3BD40-1AA0 SIRIUS power contactor, Size S0, 45 mm wide, screw terminals, 24 VDC coil, 11 kW at 690 V AC-3. Active production, sourced to order. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"101 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":"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 (0.25 ... 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=310496&mlfb=3RT1025-3BD40-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-3BD40-1AA0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3RT1025-3BD40-1AA0?","answer":"Submit an RFQ through this listing. The part is sourced to order through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What is the depth of 3RT1025-3BD40-1AA0?","answer":"The depth is 101 mm. Combined with the 45 mm width and 85 mm height, the contactor fits standard DIN-rail enclosures with 120 mm or deeper backpan."},{"question":"What wire sizes does the 3RT1025-3BD40-1AA0 accept?","answer":"The screw terminals accept 2x (0.25 to 2.5 mm²) solid or 2x (1 to 2.5 mm²) stranded, with a maximum of 2x 10 mm². In AWG, that's 2x (16 to 12) solid or 2x (14 to 10) stranded, max 1x 8 AWG."},{"question":"Will 3RT1025-3BD40-1AA0 drop into a panel specified for 3RT1023-1AL20?","answer":"The 3RT1025-3BD40-1AA0 is a Size S0 frame, while the 3RT1023-1AL20 is a smaller Size S00. The mounting hole pattern and DIN-rail footprint differ — the S0 is 45 mm wide versus 22.5 mm for S00. It will not fit without panel modification."},{"question":"What compliance documentation does Siemens provide for 3RT1025-3BD40-1AA0?","answer":"As a standard SIRIUS catalog item, the contactor carries CE marking for the European market and is designed to IEC 60947-4-1. The manufacturer provides a declaration of conformity and the product is RoHS compliant per EU directive 2011/65/EU."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-3BD40-1AA0","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/3RT1025-3BD40-1AA0 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}}