{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-3EE42-0AA0-ZD00","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-3EE42-0AA0-ZD00","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-3EE42-0AA0-ZD00","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EE42-0AA0-ZD00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA1 IEC frame 160, breaking capacity class N, Icu=25kA @ 415V, 4-pole, line protection TM220, ATFM, In=20A, overload protection Ir=14A...20A, short-circuit protection Ii=16 x In, N conductor unprotected, nut keeper kit for DC Power OEM in China.","salesMarkdown":"The Siemens 3VA1120-3EE42-0AA0-ZD00 is a 3VA1 IEC frame 160 molded case circuit breaker with a breaking capacity class N rating — Icu=25kA at 415V AC. The TM220 thermal-magnetic trip unit is set for In=20A, with overload protection adjustable from Ir=14A to 20A and fixed short-circuit protection at Ii=16 x In (320A magnetic pickup). That 16x multiplier gives a high magnetic threshold — good for motor or transformer inrush where you need to ride through starting current without nuisance tripping, but it means the short-circuit protection is less sensitive than a lower Ii setting. The ATFM designation confirms it's a fixed thermal, fixed magnetic, front-mounted rotary-handle variant. This breaker mounts in a standard IEC panel on a DIN rail or screw-fixed baseplate — the 3VA1 frame is common in distribution boards and motor control centers. The nut keeper kit (included per the order code suffix) is a detail for DC Power OEM builds in China: it retains the terminal nuts during transport and vibration, which saves a re-torque step on the line. If you're integrating into a washdown or food-grade panel, note the breaker itself is not IP-rated for hose-down; it's an open-panel device that needs an enclosure.","metaTitle":"Siemens 3VA1120-3EE42-0AA0-ZD00 Circuit Breaker, 25kA @ 415V","metaDescription":"Siemens 3VA1120-3EE42-0AA0-ZD00 IEC frame 160 circuit breaker, breaking capacity class N, Icu=25kA @ 415V, 4-pole, TM220, In=20A. Active production. Quoted 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/6502650da7f8150504f84e488f7493a3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1667618&mlfb=3VA1120-3EE42-0AA0-ZD00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EE42-0AA0-ZD00/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1120-3EE42-0AA0-ZD00 and how do I get a price?","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 price and lead time."},{"question":"What is the breaking capacity of this breaker?","answer":"The breaking capacity class N gives Icu=25kA at 415V AC, which is the maximum short-circuit current the breaker can safely interrupt at that voltage."},{"question":"What does the TM220 trip unit mean for overload and short-circuit settings?","answer":"The TM220 is a thermal-magnetic trip with In=20A, overload adjustable Ir=14A to 20A, and fixed short-circuit pickup Ii=16 x In (320A). The 16x multiplier is high, suited for loads with inrush like motors or transformers."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-3EE42-0AA0-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/3VA1120-3EE42-0AA0-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}}