{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-4HM42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-4HM42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-4HM42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-4HM42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2 series, molded case circuit breaker, 3VA2340-4HM42-0AA0, 4-pole, 400 A, ETU330 electronic trip unit, line protection.","salesMarkdown":"The Siemens 3VA2340-4HM42-0AA0 is a 4-pole SENTRON molded case circuit breaker rated for a continuous current Iu of 400 A at 40 °C, holding that rating flat through 50 °C before it starts to derate — 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C. The interrupting ratings tell you where this breaker can sit in the fault-current hierarchy: 121 kA at 240 V, 75.6 kA at 415 V and 440 V, 52.5 kA at 500 V, and 7.5 kA at 690 V. ETU330 electronic trip unit for line protection. N-conductor protection adjustable to OFF, 50%, or 100% of phase current. Rated insulation voltage 800 V. The breaker measures 184 mm wide × 248 mm high × 110 mm deep. The 4-pole width (184 mm) is the standard for a 400 A frame in the 3VA2 family — it occupies four 45 mm module positions on a DIN rail or bolted to a mounting plate. The depth of 110 mm means it clears most standard enclosure back-panels without a sub-panel extension. The ETU330 is a basic electronic trip with no communication function, so all settings are adjusted via the rotary dials on the front face. Maximum power loss is 96 W at rated current. The 96 W loss is at 400 A; at partial load the I²R losses drop proportionally.","metaTitle":"Siemens 3VA2340-4HM42-0AA0 SENTRON MCCB, 400 A, 4-Pole, ETU3","metaDescription":"Siemens SENTRON 3VA2340-4HM42-0AA0 molded case circuit breaker, 400 A, 4-pole, ETU330 electronic trip unit. Rated 121 kA at 240 V. Current lifecycle. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"110 mm","Width":"184 mm","title":"3VA2340-4HM42-0AA0","Height":"248 mm","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"75.6 kA","at 500 V":"52.5 kA","at 690 V":"7.5 kA","at 40 °C":"400 A","at 45 °C":"400 A","at 50 °C":"400 A","at 55 °C":"385 A","at 60 °C":"370 A","at 65 °C":"355 A","at 70 °C":"340 A","Depth [In]":"4.33 in","Width [In]":"7.24 in","Height [In]":"9.76 in","description":"circuit breaker 3VA2 IEC frame 400 breaking capacity class S Icu=36kA @ 415V 4-pole, line protection ETU330, LIG, In=400A overload protection Ir=160A...400A short-circuit protection Ii=1.5...10 x In N conductor protection adjustable (OFF,50%,100%) ground-fault protection Ig=0.2...1 x In= tg=0.1/0.3s nut keeper kit","Trip Indicator":"No","Number Of Poles":"4","Product version":"Line protection","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"96 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","rated insulation voltage Ui":"800 V","Courant permanent assigné Iu":"400 A","Ground-Fault Monitoring Version":"Summation current formation L + N conductor","Design Of The Overcurrent Release":"ETU330","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 50%; 100%","reference code / acc. to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Adjustable response value current / lg max.":"400 A","Adjustable response value current / lg min.":"80 A","Adjustable response value current / li max.":"4 000 A","Adjustable response value current / li min.":"600 A","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LIG","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"S","Max. rated operational current of the frame size":"400 A","Mechanical Service Life (Switching Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"on both sides nut keeper kit","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"35 x 10 mm","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"20 x 1 mm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"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=906681&mlfb=3VA2340-4HM42-0AA0"},"ai":{"faq":[{"question":"What trip unit does this MCCB use?","answer":"An ETU330 electronic trip unit configured for line protection — no ground-fault or voltage-trip function. The N-conductor protection is adjustable to OFF, 50%, or 100% of phase current."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-4HM42-0AA0","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/3VA2340-4HM42-0AA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}