{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-4GF42-0AA0-ZD00","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-4GF42-0AA0-ZD00","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-4GF42-0AA0-ZD00","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4GF42-0AA0-ZD00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA1 IEC frame 160 circuit breaker, breaking capacity class S, Icu=36kA @ 415V, 4-pole, line protection TM240, ATAM, In=25A, overload Ir=18A...25A, short-circuit Ii=6.4...12.8 x In, N conductor protection 100%, nut keeper kit for DC Power OEM in China.","salesMarkdown":"The Siemens 3VA1125-4GF42-0AA0-ZD00 is a 4-pole IEC frame 160 circuit breaker in breaking capacity class S, rated Icu=36kA at 415V. It carries a TM240 thermal-magnetic trip unit with ATAM (adjustable thermal, adjustable magnetic) — overload protection Ir adjustable from 18A to 25A, short-circuit protection Ii adjustable from 6.4 to 12.8 times In. The N conductor is protected at 100%. The TM240 trip unit gives you field-adjustable overload (Ir) and short-circuit (Ii) settings, so you tune the protection to the actual load cable and motor inrush without swapping the breaker. The 100% N protection means the neutral pole is fully rated and trips with the phases, not derated or omitted — required for systems with significant harmonic or unbalanced loads. ## Deployment context The 4-pole format suits three-phase four-wire systems (e.g. TN-S or TN-C-S) where neutral protection is mandatory. The nut keeper kit included suggests an OEM application in China where DC power distribution is common — verify the DC rating if using on a DC bus.","metaTitle":"Siemens 3VA1125-4GF42-0AA0-ZD00 Circuit Breaker, 36kA @ 415V","metaDescription":"Siemens 3VA1125-4GF42-0AA0-ZD00 circuit breaker, IEC frame 160, breaking capacity class S, Icu=36kA @ 415V, 4-pole, TM240, ATAM, In=25A, Ir=18A...25A. Lifecycle stage: current. Ava","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/5708c32ff772716ab02df926e6a14952.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1667668&mlfb=3VA1125-4GF42-0AA0-ZD00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4GF42-0AA0-ZD00/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1125-4GF42-0AA0-ZD00?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of this breaker?","answer":"It is rated Icu=36kA at 415V, which is the maximum short-circuit current it can safely interrupt at that voltage."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-4GF42-0AA0-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/3VA1125-4GF42-0AA0-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}}