{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1112-5GE42-0AA0-ZD00","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1112-5GE42-0AA0-ZD00","canonicalUrl":"https://aoctrl.com/siemens/3VA1112-5GE42-0AA0-ZD00","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1112-5GE42-0AA0-ZD00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA1 IEC frame 160, 4-pole circuit breaker, breaking capacity class M, Icu=55kA @ 415V, TM220 thermal-magnetic trip, ATFM, In=125A, overload Ir=88A...125A, short-circuit Ii=10 x In.","salesMarkdown":"The 3VA1112-5GE42-0AA0-ZD00: The 55 kA Icu at 415 V puts this in breaking capacity class M — the middle tier in the 3VA1 range, above standard (S) and below high-performance (H). For a 125 A frame, that's enough headroom for most industrial distribution panels with typical transformer impedances. The 4-pole construction means it switches the neutral as well as the three phases, which is required for TN-S or IT systems where the neutral is distributed and needs isolation during maintenance. The fixed Ii=10 x In short-circuit pickup (1250 A) gives a reasonable selectivity window against downstream 16–32 A MCBs; for tighter coordination with smaller branch breakers, you'd want the electronic trip version with adjustable Ii. ## Trip unit and adjustment range The TM220 thermal-magnetic trip uses a bimetal element for overload and a solenoid for short-circuit. Overload protection Ir is adjustable from 88 A to 125 A via a dial on the front — that's a 70–100% range of In. This lets you fine-tune the breaker to the actual cable or load rating without changing the frame. The magnetic short-circuit pickup is fixed at 10 x In, so it's not adjustable. For motor feeders or transformer primary protection where you need a higher Ii to avoid nuisance tripping on inrush, the ATFM variant offers a different curve; verify the coordination study before committing.","metaTitle":"Siemens 3VA1112-5GE42-0AA0-ZD00 Circuit Breaker, 125A, 55kA","metaDescription":"Siemens 3VA1112-5GE42-0AA0-ZD00 IEC frame 160 circuit breaker, 4-pole, 125A, Icu=55kA @ 415V, TM220 overload, ATFM. Current lifecycle stage. 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/0473e65c5c20675d5291c722c3a8b2b1.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1667568&mlfb=3VA1112-5GE42-0AA0-ZD00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1112-5GE42-0AA0-ZD00/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this breaker?","answer":"The ultimate breaking capacity Icu is 55 kA at 415 V AC, which places it in breaking capacity class M for the 3VA1 frame."},{"question":"What is the overload protection adjustment range?","answer":"The TM220 thermal-magnetic trip allows overload protection Ir adjustment from 88 A to 125 A (70–100% of In=125A). Short-circuit protection Ii is fixed at 10 x In (1250 A)."},{"question":"Where can I buy the 3VA1112-5GE42-0AA0-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."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1112-5GE42-0AA0-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/3VA1112-5GE42-0AA0-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}}