{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2125-7HM32-0LK0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2125-7HM32-0LK0","canonicalUrl":"https://aoctrl.com/siemens/3VA2125-7HM32-0LK0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2125-7HM32-0LK0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA2 IEC frame 160, breaking capacity class C, Icu=110kA @ 415V, 3-pole, ETU330 LIG trip unit, In=25A, ground-fault protection.","salesMarkdown":"The electronic trip unit is an ETU330 with LIG protection: long-time (L) adjustable overload from Ir=10 A up to 25 A, short-time/short-circuit (I) adjustable from 1.5 to 12 x In, and ground-fault (G) protection adjustable from 0.6 to 1 x In with a time delay tg of 0.1 or 0.3 seconds. That makes it suitable for a feeder or main breaker in a panel where you need selective coordination downstream — the ground-fault element catches arcing faults to earth without nuisance-tripping branch breakers. That means the panel builder does not need to order separate accessory kits for remote status indication or emergency trip; the switching contacts are already wired to terminals on the breaker. ## Integration into a panel The 3-pole footprint with the ETU330 and auxiliary switches occupies roughly the same width as a standard MCCB of this frame size — check the drilling plan if you are retrofitting into an existing gland plate or busbar system. The universal release (UNI) draws its 24 V DC from a control transformer or UPS; verify the coil inrush current against your power supply rating. The 0.1 s or 0.3 s ground-fault delay is enough to ride through a transformer inrush or a downstream GFCI trip.","metaTitle":"Siemens 3VA2125-7HM32-0LK0 Circuit Breaker, 110kA @ 415V, ET","metaDescription":"Siemens 3VA2125-7HM32-0LK0 IEC frame 160 MCCB, 3-pole, 25A, Icu=110kA @ 415V, ETU330 LIG trip unit with ground-fault. Active production. 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/641a6843e8dc2f758bb6426196efa871.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=599393&mlfb=3VA2125-7HM32-0LK0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2125-7HM32-0LK0/alternatives.json"},"ai":{"faq":[{"question":"What is the 3VA2125-7HM32-0LK0 used for?","answer":"It is a 3-pole IEC molded-case circuit breaker with an ETU330 LIG electronic trip unit, rated In=25 A with adjustable ground-fault protection. It is used as a main or feeder breaker in distribution panels where high interrupting capacity (110 kA at 415 V) and ground-fault detection are required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2125-7HM32-0LK0","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/3VA2125-7HM32-0LK0 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}}