{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-5GE42-0AA0-ZD00","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-5GE42-0AA0-ZD00","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-5GE42-0AA0-ZD00","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5GE42-0AA0-ZD00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA1 IEC frame 160, breaking capacity class M, 4-pole, line protection TM220, ATFM, In=20A, overload protection Ir=14A...20A, short-circuit protection Ii=16 x In, N conductor protection 100%, nut keeper kit for DC Power OEM in China.","salesMarkdown":"The Siemens 3VA1120-5GE42-0AA0-ZD00 is a 4-pole IEC frame 160 molded case circuit breaker (MCCB) with a 55 kA breaking capacity at 415 V — that's breaking capacity class M, meaning it clears high-fault currents on industrial distribution without cascading upstream. Rated In=20 A with TM220 thermal-magnetic trip, overload adjustable Ir=14 A…20 A, and fixed short-circuit pickup Ii=16 x In (320 A). The N conductor is protected at 100%. The TM220 thermal-magnetic unit gives you adjustable overload (Ir) via a dial on the front, so you can set it to match the cable or load without swapping the breaker body. Fixed magnetic pickup at 16 x In means it's a standard motor-starting curve, not a selective or electronic trip — fine for general distribution or feeder protection where you don't need zone selectivity. The 100% N conductor protection means the neutral pole trips at the same rating as the phases — required for some configurations with harmonic loads or where neutral current can approach phase current. The nut keeper kit is a small detail but saves time on the panel build: no loose hardware to drop into the enclosure. ## Deployment context The DC Power OEM designation means it's built into a DC power supply or UPS system manufactured in China, so the breaker is the line-side protection for the rectifier input.","metaTitle":"Siemens 3VA1120-5GE42-0AA0-ZD00 Circuit Breaker, 55kA @ 415V","metaDescription":"Siemens 3VA1120-5GE42-0AA0-ZD00 IEC frame 160 MCCB, 55kA breaking capacity at 415V, 4-pole, 20A TM220 overload. Current lifecycle. 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/df3d66c33c8e4825c5a7ed57e3e498a1.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1667640&mlfb=3VA1120-5GE42-0AA0-ZD00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-5GE42-0AA0-ZD00/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1120-5GE42-0AA0-ZD00 and 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 is 55 kA at 415 V (Icu), which is breaking capacity class M per IEC. That's the maximum fault current it can safely interrupt at that voltage."},{"question":"What does the TM220 trip unit mean?","answer":"TM220 is a thermal-magnetic trip with adjustable overload protection. Overload current Ir is adjustable from 14 A to 20 A via a dial. Short-circuit protection Ii is fixed at 16 x In (320 A)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1120-5GE42-0AA0-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/3VA1120-5GE42-0AA0-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}}