{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3RT1025-3BB40-ZX95","brand":"Siemens","brandSlug":"siemens","productSlug":"3RT1025-3BB40-ZX95","canonicalUrl":"https://aoctrl.com/siemens/3RT1025-3BB40-ZX95","factsUrl":"https://aoctrl.com/api/mcp/products/3RT1025-3BB40-ZX95","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SIRIUS 3RT1025-3BB40-ZX95 power contactor, size S0, 24 VDC coil, 10 A rated at 24 V, screw terminals, DIN rail mount.","salesMarkdown":"The Siemens SIRIUS 3RT1025-3BB40-ZX95 is a size S0 power contactor with a 24 VDC coil, designed for switching motor loads and resistive loads in industrial control panels. Rated for 10 A at 24 V (AC-12) and 10 kW at 500 V, it covers a broad range of motor and general switching duties. The AC-4 rating at 400 V is 15.5 A, which is the figure to watch for reversing or inching applications where the contactor makes and breaks motor current under load. The 24 VDC coil draws 5.4 W for both closing and holding, so the control transformer or power supply must be sized for that inrush. The holding power is the same as closing — no drop-off — meaning the coil stays at full dissipation continuously. Pollution degree 3 (industrial environment, conductive pollution) and IP20 on the front face mean the contactor is suited for enclosed panels where the front is protected from accidental contact. The terminal area is IP00 — bare terminals — so finger-safe shrouds or a dead-front cover are needed if the panel is live. Operating temperature range is -25 to +60 °C, with a maximum operating altitude of 2 000 m. Main circuit terminals are screw-type, accepting 2x (0.25 to 2.5 mm²) solid or 2x (1 to 2.5 mm²) stranded, up to 2x 10 mm² or 1x 8 AWG. For type 2 coordination (no damage to the contactor on a short circuit), use a 25 A gL/gG fuse upstream; for type 1 (contactor may need replacement after a fault), a 63 A gL/gG fuse is allowed.","metaTitle":"Siemens SIRIUS 3RT1025-3BB40-ZX95 Power Contactor, S0, 24 VD","metaDescription":"Siemens SIRIUS 3RT1025-3BB40-ZX95 power contactor, size S0, 24 VDC coil, 10 A rated at 24 V. Current production. DIN rail mount. Screw terminals. Sourced to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Contactors"],"specifications":{"Depth":"100 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":"24 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=135058&mlfb=3RT1025-3BB40-ZX95","alternativesUrl":"https://aoctrl.com/api/mcp/products/3RT1025-3BB40-ZX95/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for this contactor?","answer":"24 VDC coil, 10 A at 24 V (AC-12), 10 kW at 500 V, 11 kW at 690 V, AC-4 rating 15.5 A at 400 V. Mechanical endurance 10 million cycles."},{"question":"What is the mounting and wiring specification?","answer":"DIN rail mount (35 mm per DIN EN 50022), screw or snap-on. Screw terminals for main circuit, accepting up to 2x 10 mm² or 1x 8 AWG. Side-by-side mounting allowed with 6 mm clearance."},{"question":"What fuse coordination is recommended?","answer":"For type 2 coordination, use a 25 A gL/gG fuse. For type 1 coordination, a 63 A gL/gG fuse is permitted."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3RT1025-3BB40-ZX95","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-ZX95 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}}