{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-3GE42-0AA0-ZD00","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-3GE42-0AA0-ZD00","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-3GE42-0AA0-ZD00","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-3GE42-0AA0-ZD00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA1 series, IEC frame 160, breaking capacity class N, Icu=25kA @ 415V, 4-pole, line protection TM220, ATFM, In=25A, overload protection Ir=18A...25A, short-circuit protection Ii=12.8 x In, N conductor protection 100%.","salesMarkdown":"The Siemens 3VA1125-3GE42-0AA0-ZD00 is a 4-pole IEC frame 160 molded case circuit breaker with a 25 A thermal-magnetic trip unit (TM220, ATFM). The headline breaking capacity is Icu=25kA at 415 V AC under breaking capacity class N — that means it can safely interrupt a fault current up to 25,000 A without welding or failing open, which is the standard requirement for most commercial and light industrial distribution boards in 400 V class systems. The overload protection is adjustable from 18 A to 25 A (Ir), and the instantaneous short-circuit pickup is fixed at 12.8 × In (320 A at the 25 A setting). The 100% N-conductor protection means the neutral pole is fully rated and protected, not just switched, so it's suited for 4-wire systems with significant neutral loading — common in data center or multi-phase rectifier feeds. The 3VA1 frame is a DIN-rail or panel-mount design for enclosure integration. Given the 25 A rating and 25 kA SCCR, it fits as a main or feeder breaker in a sub-distribution board, or as a branch protector for a 25 A motor circuit or a 25 A UPS bypass. The TM220 curve is a standard thermal-magnetic characteristic; it coordinates with downstream miniature breakers on most 10 kA rated panelboards.","metaTitle":"Siemens 3VA1125-3GE42-0AA0-ZD00 Circuit Breaker, 25A, 25kA @","metaDescription":"Siemens 3VA1125-3GE42-0AA0-ZD00 IEC frame 160 circuit breaker, breaking capacity class N, Icu=25kA @ 415V, 4-pole, In=25A. Current lifecycle stage. Available 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/2417a0d97a67856553e41cf98d63fa19.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1667658&mlfb=3VA1125-3GE42-0AA0-ZD00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-3GE42-0AA0-ZD00/alternatives.json"},"ai":{"faq":[{"question":"How do I get pricing and availability for 3VA1125-3GE42-0AA0-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 quote."},{"question":"What is the breaking capacity of this circuit breaker?","answer":"The Icu (ultimate breaking capacity) is 25 kA at 415 V AC under breaking capacity class N. This is the maximum fault current it can safely interrupt once."},{"question":"What does the 100% N conductor protection mean?","answer":"The neutral pole is fully rated and protected at 100% of the phase rating, not just switched. This is required for 4-wire systems where the neutral carries sustained load current — typical in data center PDU feeds or three-phase rectifier circuits."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-3GE42-0AA0-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/3VA1125-3GE42-0AA0-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}}