{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-3EF42-0AA0-ZD00","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-3EF42-0AA0-ZD00","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-3EF42-0AA0-ZD00","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF42-0AA0-ZD00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA1 IEC frame 160, circuit breaker, breaking capacity class N, Icu=25kA @ 415V, 4-pole, line protection TM240, ATAM, In=20A, overload protection Ir=14A...20A, short-circuit protection Ii=8...16 x In.","salesMarkdown":"## What this 3VA1 frame breaker delivers The Siemens 3VA1120-3EF42-0AA0-ZD00 is a 4-pole IEC frame 160 molded case circuit breaker in the 3VA1 series, rated for line protection with a TM240 thermal-magnetic trip unit. Its 20 A rated current (In) and adjustable overload protection from 14 A to 20 A (Ir) let you dial in the exact continuous-current limit for the downstream load — useful when the branch circuit draws less than the full 20 A and you want tighter coordination. The short-circuit pickup (Ii) is adjustable from 8 to 16 times In, so magnetic tripping can be set between 160 A and 320 A to ride through motor inrush or transformer energization without nuisance trips. The suffix \"-ZD00\" indicates a special OEM configuration (nut keeper kit, DC Power OEM in China). If your application does not require that specific accessory kit, the base order code 3VA1120-3EF42-0AA0 may be a simpler alternative — verify with your Siemens representative whether the nut keeper kit is needed for your panel assembly. ## Deployment context The 4-pole footprint with unprotected neutral means the neutral busbar passes through without interruption — plan your phase-to-neutral fault path accordingly (the breaker clears phase faults only; neutral-ground faults rely on upstream protection).","metaTitle":"Siemens 3VA1120-3EF42-0AA0-ZD00 Circuit Breaker, 20A, 25kA @","metaDescription":"Siemens 3VA1120-3EF42-0AA0-ZD00 IEC frame 160 circuit breaker, 20A, 25kA breaking capacity @ 415V. Current lifecycle stage. 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/75b4063ed19a0be330e6f1ff83e52c31.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1667620&mlfb=3VA1120-3EF42-0AA0-ZD00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EF42-0AA0-ZD00/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this breaker?","answer":"The Icu (ultimate breaking capacity) is 25 kA at 415 V AC, which is the class N rating for the 3VA1 frame — suitable for standard distribution panels where prospective fault current stays at or below that level."},{"question":"Where can I buy 3VA1120-3EF42-0AA0-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 — submit an RFQ for a firm commitment."},{"question":"What does the TM240 trip unit mean?","answer":"TM240 indicates a thermal-magnetic trip unit with adjustable overload (Ir) from 14 A to 20 A and adjustable short-circuit pickup (Ii) from 8 to 16 times In (160 A to 320 A). The thermal element provides inverse-time overload protection; the magnetic element provides instantaneous short-circuit protection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-3EF42-0AA0-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/3VA1120-3EF42-0AA0-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}}