{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-1BE40","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-1BE40","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-1BE40","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1BE40","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, S0 size, 3RT1025-1BE40, 11 kW at 690 V AC-3, 24 V DC coil, screw terminals, DIN rail mount.","salesMarkdown":"The Siemens 3RT1025-1BE40 is a SIRIUS S0-frame power contactor rated for motor switching up to 11 kW at 690 V AC-3 and 10 kW at 500 V. It carries a 24 V DC coil with a steady holding power draw of 5.4 W. The S0 frame size — 45 mm wide, 85 mm tall, 101 mm deep — makes it a standard fit across motor control centres and panel layouts that use the 35 mm DIN rail per DIN EN 50022. For reversing or plugging duty (AC-4), the rated current drops to 15.5 A at 400 V — the higher switching frequency and inrush on reversal means the contactor derates from its AC-3 capability. Side-by-side mounting is permitted, which matters when you are packing multiple contactors into a row — the S0 width of 45 mm per unit sets the fill factor. That means the front is touch-safe for panel builders, but the terminals themselves are not finger-safe once the gland plate is open — standard for this class of contactor. These are the values a panel builder needs to set the branch-circuit protection — oversize the fuse and you lose the coordination the contactor was tested for. For a BOM that needs this exact S0 contactor with the 24 V DC coil, the part is in standard production and can be specified without concern for imminent phase-out. Sourcing is straightforward for an active Siemens SIRIUS line item. If you hold a panel that originally specified a different S0 contactor — say the 3RT1023-1AL20 — the 3RT1025-1BE40 shares the same S0 frame and DIN-rail footprint, but verify the coil voltage and power ratings match your load before swapping. ## Terminal wiring details Main current circuit terminals are screw-type. They accept solid conductors from 2x 0.5 mm² up to 2x 4 mm², and stranded conductors from 2x 1 mm² up to 2x 10 mm². AWG equivalents run from 2x 16–12 down to 1x 8 for the main contacts. This covers most panel wiring from control-circuit tails to motor-feed cables within the S0 contactor's rating.","metaTitle":"Siemens 3RT1025-1BE40 SIRIUS Power Contactor, 11 kW at 690 V","metaDescription":"Siemens 3RT1025-1BE40 SIRIUS S0 power contactor. 11 kW at 690 V AC-3, 15.5 A AC-4 at 400 V. 24 V DC coil. DIN rail mount. Current lifecycle stage. 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":"60 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=410423&mlfb=3RT1025-1BE40","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-1BE40/alternatives.json"},"ai":{"faq":[{"question":"What are the key power ratings for the 3RT1025-1BE40?","answer":"The contactor is rated 11 kW at 690 V AC-3, 10 kW at 500 V AC-3, and 15.5 A at 400 V AC-4 for reversing duty. The AC-2 rating is 7.5 kW at 400 V."},{"question":"Will the 3RT1025-1BE40 drop into a panel specified for a 3RT1023-1AL20?","answer":"Both are S0-frame contactors on the same 35 mm DIN-rail footprint. The physical dimensions and mounting are identical, so it will fit mechanically. However, verify the coil voltage and power ratings — the 3RT1025-1BE40 uses a 24 V DC coil, while the 3RT1023-1AL20 may differ."},{"question":"What is the depth of the 3RT1025-1BE40?","answer":"The depth is 101 mm. The overall dimensions are 45 mm wide by 85 mm tall by 101 mm deep."},{"question":"Where can I buy the 3RT1025-1BE40 and how is it quoted?","answer":"The 3RT1025-1BE40 is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time. Submit an RFQ for a firm commercial offer."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-1BE40","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/3RT1025-1BE40 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}}