{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-3GF42-0AA0-ZD00","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-3GF42-0AA0-ZD00","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-3GF42-0AA0-ZD00","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-3GF42-0AA0-ZD00","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA1 IEC frame 160, breaking capacity class N, Icu=25kA @ 415V, 4-pole, line protection TM240, ATAM, In=25A, overload protection Ir=18A...25A, short-circuit protection Ii=6.4...12.8 x In, N conductor protection 100%, nut keeper kit for DC Power OEM in China.","salesMarkdown":"## What this breaker is and what it does The Siemens 3VA1125-3GF42-0AA0-ZD00 is a 4-pole IEC frame 160 molded-case circuit breaker with a 25 A continuous rating (In=25A) and a breaking capacity class N — Icu=25 kA at 415 V. That 25 kA interrupting rating means it can safely clear a fault up to that level on a 415 V three-phase system without welding contacts or rupturing the case, which is the standard for downstream distribution panels and motor branch circuits in IEC markets. ## Adjustable protection and what it means on the line Overload protection (Ir) is adjustable from 18 A to 25 A via the TM240 thermal-magnetic trip unit — you dial it to match the actual load current, not the breaker frame. Short-circuit magnetic pickup (Ii) is set at 6.4 to 12.8 times In, which for a 25 A breaker means the instantaneous trip point ranges from 160 A to 320 A. That range lets you coordinate with downstream devices: set low for sensitive loads (e.g., control transformers), set high to ride through motor inrush on a conveyor or pump start. ## Where it fits in the panel This breaker mounts on a standard DIN rail in the enclosure. The 100% N-conductor protection means the neutral pole is fully rated and protected — no derating needed for single-phase line-to-neutral faults. The nut keeper kit is included for DC Power OEM applications in China, so if you're building a DC bus distribution panel, the hardware for secure bus-bar connections is already in the box.","metaTitle":"Siemens 3VA1125-3GF42-0AA0-ZD00 Circuit Breaker, 25A, 25kA @","metaDescription":"Siemens 3VA1125-3GF42-0AA0-ZD00 IEC frame 160 circuit breaker, 25A, 25kA breaking capacity at 415V. 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/f5981db487477d9d1633f276062c250f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1667659&mlfb=3VA1125-3GF42-0AA0-ZD00","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-3GF42-0AA0-ZD00/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this breaker?","answer":"Icu=25 kA at 415 V, breaking capacity class N per IEC 60947-2. That means it can safely interrupt a fault current up to 25,000 A at 415 V without damage."},{"question":"What is the adjustable overload range on this breaker?","answer":"Overload protection Ir is adjustable from 18 A to 25 A via the TM240 thermal-magnetic trip unit. Short-circuit magnetic pickup Ii is adjustable from 6.4 to 12.8 times In (160 A to 320 A for the 25 A frame)."},{"question":"Where can I buy 3VA1125-3GF42-0AA0-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."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-3GF42-0AA0-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/3VA1125-3GF42-0AA0-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}}