{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-4EF42-0AA0-ZD00","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-4EF42-0AA0-ZD00","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-4EF42-0AA0-ZD00","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4EF42-0AA0-ZD00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA1 IEC frame 160, breaking capacity class S, 4-pole circuit breaker, 25 A, Icu = 36 kA @ 415 V, TM240 overload protection, ATAM, nut keeper kit for DC Power OEM in China.","salesMarkdown":"The Siemens 3VA1125-4EF42-0AA0-ZD00 is a 4-pole IEC frame 160 molded case circuit breaker with a 25 A rated current (In) and a breaking capacity class S giving Icu = 36 kA at 415 V AC. The TM240 thermal-magnetic trip unit provides adjustable overload protection (Ir) from 18 A to 25 A and adjustable short-circuit protection (Ii) from 6.4 to 12.8 times In, so you tune the trip curve to the downstream load without swapping the breaker body. This variant includes a nut keeper kit and is configured for DC Power OEM applications in China. ## Deployment context The 4-pole configuration suits three-phase plus neutral distribution in industrial switchboards, motor control centers, or OEM machinery where the 25 A rating covers branch circuits feeding small motors, lighting, or control transformers. The nut keeper kit simplifies captive hardware handling during panel assembly.","metaTitle":"Siemens 3VA1125-4EF42-0AA0-ZD00 Circuit Breaker, 25A, 36kA @","metaDescription":"Siemens 3VA1125-4EF42-0AA0-ZD00 IEC frame 160 circuit breaker, 25A, 36kA breaking capacity @ 415V, 4-pole. Lifecycle stage: current. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"lifecycle_stage":"current"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/b54a29c83df1e4c2681b2ca794c29bc2.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1667665&mlfb=3VA1125-4EF42-0AA0-ZD00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4EF42-0AA0-ZD00/alternatives.json"},"ai":{"faq":[{"question":"How do I get pricing and availability for 3VA1125-4EF42-0AA0-ZD00?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution; current pricing and availability are confirmed at quote time."},{"question":"What is the breaking capacity of this breaker?","answer":"The Icu is 36 kA at 415 V AC, which is the maximum short-circuit current the breaker can safely interrupt without damage."},{"question":"What trip unit does the 3VA1125-4EF42-0AA0-ZD00 use?","answer":"It uses a TM240 thermal-magnetic trip unit with adjustable overload protection Ir = 18 A to 25 A and adjustable short-circuit protection Ii = 6.4 to 12.8 x In."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-4EF42-0AA0-ZD00","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/3VA1125-4EF42-0AA0-ZD00 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}}