{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-4FF42-0KA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-4FF42-0KA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-4FF42-0KA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4FF42-0KA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA1 series, IEC frame 250, breaking capacity class S, 4-pole, In=250A, overload protection Ir=175-250A, short-circuit protection Ii=5-10 x In, with shunt trip left 208-277V AC 50/60 Hz 220-250V DC.","salesMarkdown":"The Siemens 3VA1225-4FF42-0KA0 is a 4-pole IEC frame 250 molded case circuit breaker from the 3VA1 series, configured for line protection with a TM240 thermal-magnetic trip unit. The TM240 trip provides adjustable overload protection (Ir = 175–250 A) and fixed short-circuit pickup (Ii = 5–10 × In), letting you dial in the continuous current to match the downstream load without swapping the breaker body. ## Built-in shunt trip and N-conductor protection This variant ships with a factory-installed shunt trip on the left side, rated 208–277 V AC 50/60 Hz and 220–250 V DC. That remote-trip capability is typical for emergency-stop circuits or remote shutdown in conveyor and pump panels. The N-conductor protection at 50% means the neutral pole trips at half the phase-pole setting — common for 4-wire systems where neutral current is limited by harmonic content.","metaTitle":"Siemens 3VA1225-4FF42-0KA0 Circuit Breaker, 250A, 36kA @ 415","metaDescription":"Siemens 3VA1225-4FF42-0KA0 IEC frame 250 circuit breaker, 36kA breaking capacity at 415V, 4-pole, TM240 thermal-magnetic trip, shunt trip accessory. Current lifecycle stage. Availa","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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1421313&mlfb=3VA1225-4FF42-0KA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4FF42-0KA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy the 3VA1225-4FF42-0KA0 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 offer."},{"question":"What is the breaking capacity of this breaker?","answer":"The 3VA1225-4FF42-0KA0 is rated Icu = 36 kA at 415 V (breaking capacity class S), which means it can safely interrupt fault currents up to 36,000 A at that voltage without failure."},{"question":"What is the adjustable trip range on this TM240 unit?","answer":"Overload protection (Ir) adjusts from 175 A to 250 A, and short-circuit protection (Ii) is fixed at 5 to 10 times the rated current (In = 250 A)."},{"question":"Does this breaker include a shunt trip?","answer":"Yes, it includes a factory-installed shunt trip on the left side, rated 208–277 V AC 50/60 Hz and 220–250 V DC, for remote or emergency tripping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-4FF42-0KA0","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/3VA1225-4FF42-0KA0 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}}