{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-4GE42-0AA0-ZD00","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-4GE42-0AA0-ZD00","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-4GE42-0AA0-ZD00","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4GE42-0AA0-ZD00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA1 IEC frame 160, breaking capacity class S, 4-pole MCCB, 20 A rated, 36 kA at 415 V, TM220 overload protection, ATFM, with N-conductor protection at 100%.","salesMarkdown":"The Siemens 3VA1120-4GE42-0AA0-ZD00 is a 3VA1 IEC frame 160 molded-case circuit breaker in breaking capacity class S, rated 20 A with a 36 kA interrupting capacity at 415 V. It is a 4-pole unit with TM220 thermal-magnetic overload protection, adjustable Ir from 14 A to 20 A, and fixed short-circuit pickup Ii at 16 x In. The ATFM designation indicates line protection with N-conductor protection at 100%. The 4-pole configuration with 100% N-conductor protection suits it for three-phase systems where neutral continuity is critical — typically 400 V distribution panels feeding mixed single-phase and three-phase loads. The nut keeper kit for DC Power OEM in China is a factory-fitted option on this order code, indicating it was configured for an OEM application requiring captive hardware for DC-side terminations. This does not affect the breaker's AC ratings.","metaTitle":"Siemens 3VA1120-4GE42-0AA0-ZD00 3VA1 IEC Frame 160, 20A, 36k","metaDescription":"Siemens 3VA1120-4GE42-0AA0-ZD00 circuit breaker, 3VA1 IEC frame 160, 20A, 36kA breaking capacity at 415V, 4-pole, TM220 overload, ATFM. Current lifecycle stage. Sourced 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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1667631&mlfb=3VA1120-4GE42-0AA0-ZD00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-4GE42-0AA0-ZD00/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA1120-4GE42-0AA0-ZD00?","answer":"Icu is 36 kA at 415 V, which is the breaking capacity class S for the 3VA1 frame. This means it can safely interrupt fault currents up to 36 kA without upstream fuses or breakers needing to clear first — useful for high-fault-capacity industrial distribution boards."},{"question":"What does the TM220 overload protection setting mean?","answer":"TM220 is a thermal-magnetic trip unit with adjustable overload Ir from 14 A to 20 A and fixed short-circuit pickup Ii at 16 x In (320 A). The thermal element provides inverse-time protection for cable and load overheating, while the magnetic element handles instantaneous short-circuit clearance."},{"question":"Where can I buy 3VA1120-4GE42-0AA0-ZD00 and get current pricing?","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 your quantity and delivery window."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-4GE42-0AA0-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/3VA1120-4GE42-0AA0-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}}