{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1140-3EE42-0AA0-ZD00","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1140-3EE42-0AA0-ZD00","canonicalUrl":"https://aoctrl.com/siemens/3VA1140-3EE42-0AA0-ZD00","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1140-3EE42-0AA0-ZD00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA1 IEC frame 160, circuit breaker, breaking capacity class N, Icu=25kA @ 415V, 4-pole, line protection TM220, ATFM, In=40A, overload protection Ir=28A...40A, short-circuit protection Ii=10 x In, N conductor unprotected, nut keeper kit for DC Power OEM in China.","salesMarkdown":"This Siemens 3VA1140-3EE42-0AA0-ZD00 is a 4-pole IEC frame 160 molded case circuit breaker with a 40 A continuous rating and a 25 kA interrupting capacity at 415 V. The breaking capacity class N puts it in the standard-duty range for general distribution panels — not the high-fault gear you'd spec for a transformer secondary, but plenty for most branch circuits in a commercial or light industrial plant. The thermal-magnetic trip unit (TM220, ATFM) provides adjustable overload protection from 28 A to 40 A via the Ir dial, and fixed short-circuit protection at 10 times the In rating. The N conductor is unprotected on this variant, meaning the neutral bar passes straight through without a pole or trip. That's common for 3-phase + N distribution where the neutral only carries unbalanced current and doesn't need its own overcurrent device. The nut keeper kit is a detail for the DC Power OEM build in China — keeps the terminals from backing off under vibration on a DC bus. The 4-pole footprint takes up the same width as four single-pole breakers ganged together, so factor that into your enclosure fill calculations. The nut keeper kit is already on the terminals, which saves a step if you're torquing down DC bus bars. The TM220 thermal unit is ambient-compensated, but if your panel runs above 40 °C ambient, you'll want to derate the Ir setting per the standard IEC 60947-2 thermal curve. In a crowded enclosure with drives or transformers dumping heat, that's a real consideration — the breaker might trip earlier than the dial setting suggests.","metaTitle":"Siemens 3VA1140-3EE42-0AA0-ZD00 Circuit Breaker, 40A, 25kA @","metaDescription":"Siemens 3VA1140-3EE42-0AA0-ZD00 IEC frame 160 circuit breaker, 40A, 25kA breaking capacity @ 415V. Current production lifecycle. Quoted to order.","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/8fffa65c340b456529959f36469b18c9.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1667726&mlfb=3VA1140-3EE42-0AA0-ZD00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1140-3EE42-0AA0-ZD00/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting rating of this breaker?","answer":"The 3VA1140-3EE42-0AA0-ZD00 has a 25 kA interrupting capacity at 415 V (breaking capacity class N)."},{"question":"What does the N conductor unprotected mean on this breaker?","answer":"It means the neutral conductor passes through the breaker without a pole or overcurrent trip — standard for 3-phase + N distribution where the neutral carries only unbalanced current."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1140-3EE42-0AA0-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/3VA1140-3EE42-0AA0-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}}