{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-3BB40-1AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-3BB40-1AA0","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-3BB40-1AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-3BB40-1AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS power contactor, 3RT1025-3BB40-1AA0, size S0, 24 VDC coil, screw-type main terminals, spring-loaded auxiliary/control terminals, IP20 front.","salesMarkdown":"The 24 V DC coil pulls 5.4 W on closing and holds at 5.4 W — a continuous-duty coil, so no external holding-current economizer needed. Rated operational current at AC-12 (resistive) is 10 A maximum. For motor duty, it's rated 7.5 kW at 400 V in AC-2 (slip-ring motor starting), and 15.5 A at 400 V in AC-4 (plugging/reversing/inching). At 500 V it handles 10 kW; at 690 V, 11 kW. Side-by-side mounting is allowed. Main circuit terminals accept solid or stranded wire: 2x (0.25–2.5 mm²), 2x (1–2.5 mm²), 2x (2.5–6 mm²), or max 2x 10 mm². AWG equivalents: 2x (16–12), 2x (14–10), 1x 8. Auxiliary terminals accept 2x (24–14) AWG. For type 2 coordination ('no damage' under short circuit), use a gL/gG fuse rated 25 A. For type 1 coordination ('may need replacement after fault'), use a 63 A gL/gG fuse. Mechanical endurance is typical 10 million operations, so it'll outlast most machines in normal cycling. Compliance: RoHS substance prohibition date is 2006-07-01, so it meets the original RoHS directive. No UL or CSA listing is explicitly stated in the evidence, but the IEC ratings (AC-2, AC-4, pollution degree 3) are standard for European-spec panels.","metaTitle":"Siemens 3RT1025-3BB40-1AA0 SIRIUS Power Contactor, 24 VDC, S","metaDescription":"Siemens SIRIUS 3RT1025-3BB40-1AA0 power contactor, size S0, 24 VDC coil, screw main terminals, spring-loaded aux. Current lifecycle. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"101 mm","Solid":"2x (0.25 ... 2.5 mm²)","Width":"45 mm","Height":"85 mm","Rated Value":"24 V","On The Front":"IP20","Initial Value":"0.8","Of The Terminal":"IP00","lifecycle_stage":"current","During Operation":"-25 ... +60 °C","Fastening Method":"screw and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022","Full-Scale Value":"1.1","Size Of Contactor":"S0","Solid Or Stranded":"2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 mm²","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","Side-By-Side Mounting":"Yes","For Main Current Circuit":"screw-type terminals","at AC-2 at 400 V rated value":"7.5 kW","at AC-4 at 400 V rated value":"15.5 A","Substance Prohibitance (Date)":"01.07.2006 00:00:00","at AWG cables for main contacts":"2x (16 ... 12), 2x (14 ... 10), 1x 8","For Auxiliary And Control Circuit":"spring-loaded terminals","With Type Of Assignment 2 Required":"fuse gL/gG: 25 A","closing power of magnet coil at DC":"5.4 W","holding power of magnet coil at DC":"5.4 W","reference code acc. to IEC 81346-2":"Q","With Type Of Coordination 1 Required":"fuse gL/gG: 63 A","at AWG cables for auxiliary contacts":"2x (24 ... 14)","operational current at AC-12 maximum":"10 A","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","Contact Reliability Of Auxiliary Contacts":"1 faulty switching per 100 million (17 V, 1 mA)","Finely Stranded Without Core End Processing":"2x (0.25 ... 2.5 mm²)","Type Of Voltage Of The Control Supply Voltage":"DC","Required Spacing For Grounded Parts At The Side":"6 mm","Installation Altitude At Height Above Sea Level Maximum":"2 000 m","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","number of NC contacts for auxiliary contacts instantaneous contact":"0","number of NO contacts for auxiliary contacts instantaneous contact":"0","Of The Contactor With Added Electronically Optimized 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=517558&mlfb=3RT1025-3BB40-1AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-3BB40-1AA0/alternatives.json"},"ai":{"faq":[{"question":"What's the closest functional second-source — 3RT1015-1BB42?","answer":"The 3RT1015-1BB42 is a smaller frame size (S00 vs S0) with a different coil voltage and terminal arrangement. It won't drop into a panel wired for the 3RT1025-3BB40-1AA0 without rewiring the main power terminals and checking the mounting rail space. The 3RT1025-3BB40-1AA0 is the correct S0-frame part for 24 VDC coil applications."},{"question":"What is the depth of this contactor?","answer":"101 mm. That's the dimension from the mounting surface to the furthest protrusion — critical for shallow enclosures or tight gland-plate clearance."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-3BB40-1AA0","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/3RT1025-3BB40-1AA0 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}}