{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5HL42-0KB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5HL42-0KB0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5HL42-0KB0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5HL42-0KB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens 3VA2 IEC frame 400, 4-pole molded case circuit breaker, 55kA breaking capacity class M at 415V AC, ETU320 LI trip unit, In=400A, adjustable Ir 160-400A, shunt trip 208-277V AC, 2 auxiliary switches.","salesMarkdown":"## What this breaker brings to the panel The Siemens 3VA2340-5HL42-0KB0 is a 4-pole IEC frame 400 molded case circuit breaker with a 55 kA interrupting capacity at 415 V AC — class M breaking capacity, meaning it clears high fault currents typical in industrial distribution without cascading upstream. The ETU320 LI trip unit gives you adjustable overload protection (Ir from 160 A to 400 A) and short-circuit pickup (Ii from 1.5 to 10 x In), so you dial in the protection curve to match the feeder or motor load, not the other way around. The neutral conductor protection is adjustable — OFF, 50%, or 100% of the phase rating — handy for 4-wire systems where you need to coordinate ground-fault or harmonic currents without nuisance trips. The ETU320 is a Li (long-time and instantaneous) electronic trip unit — no short-time delay. For selectivity with downstream breakers, use an ETU350 or ETU550. The shunt trip occupies the left accessory slot; the two auxiliary switches fit the right side. Wire the shunt trip coil to a normally open emergency-stop circuit — it's a trip-to-open function, so loss of control power opens the breaker. The nut keeper kit (included per the order code suffix) prevents the busbar connection nuts from backing off under vibration — a small detail that saves a callout on a motor control center with frequent starts.","metaTitle":"Siemens 3VA2340-5HL42-0KB0 Circuit Breaker, 400A, 55kA @ 415","metaDescription":"Siemens 3VA2340-5HL42-0KB0 IEC frame 400 circuit breaker, 4-pole, 55kA breaking capacity at 415V AC. ETU320 LI trip unit, adjustable Ir 160-400A. Active production. Sourced to orde","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/c1b3b6c5f6d67465025ac41848ceb75e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1123444&mlfb=3VA2340-5HL42-0KB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5HL42-0KB0/alternatives.json"},"ai":{"faq":[{"question":"What trip unit does this breaker use?","answer":"It uses an ETU320 LI electronic trip unit with adjustable long-time pickup (Ir 160-400 A) and instantaneous pickup (Ii 1.5-10 x In). No short-time delay or ground-fault function."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-5HL42-0KB0","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/3VA2340-5HL42-0KB0 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}}