{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-7HN42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-7HN42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-7HN42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-7HN42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2340-7HN42-0AA0, molded case circuit breaker, 4-pole, 400 A continuous, ETU350 electronic trip unit, line protection design.","salesMarkdown":"The 4-pole configuration handles three-phase plus neutral protection, common for main incomers or feeder breakers in 400 V distribution panels. Breaking capacity is 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 7.5 kA at 690 V — the steep drop above 500 V means this breaker is sized for low-voltage main distribution, not 690 V motor circuits. The ETU350 is a programmable electronic trip unit with LSI (long-time, short-time, instantaneous) protection curves, adjustable via the front interface, so coordination studies can be dialed in without swapping trip packs. ## Temperature derating — the real-world current Above that, derate linearly: 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C. If the panel ambient runs at 55 °C, the breaker delivers 385 A continuous — not 400 A. Dimensions: 248 mm height, 184 mm width, 110 mm depth. The 184 mm width is for a 4-pole frame — verify the panel cutout or mounting plate accommodates that before committing the BOM.","metaTitle":"Siemens 3VA2340-7HN42-0AA0 SENTRON MCCB, 400A, 4-Pole, ETU35","metaDescription":"Siemens SENTRON 3VA2340-7HN42-0AA0 molded case circuit breaker, 400 A continuous, 4-pole, ETU350 trip unit. Breaking capacity 330 kA at 240 V. Active production. Quoted to order ag","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"110 mm","Width":"184 mm","Height":"248 mm","Maximum":"4 000 A","Minimum":"4 000 A","at 240 V":"330 kA","at 415 V":"242 kA","at 440 V":"242 kA","at 500 V":"187 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","Trip Indicator":"No","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Line protection","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","Ground-Fault Monitoring Version":"Without","Continuous Current / Rated Value":"400 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU350","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 50%; 100%","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","reference code / according to IEC 81346-2":"Q","Continuous Current / Rated Value / Maximum":"400 A","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LSI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"C","Mechanical Service Life (Operating 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"}},"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=118837&mlfb=3VA2340-7HN42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-7HN42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA2340-7HN42-0AA0 and how is it quoted?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of 3VA2340-7HN42-0AA0 at 415 V?","answer":"242 kA at 415 V. The same rating applies at 440 V. At 240 V it is 330 kA; at 500 V it drops to 187 kA; at 690 V it is 7.5 kA."},{"question":"What trip unit does this MCCB use?","answer":"An ETU350 electronic trip unit with LSI protection curves, adjustable via the front interface."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-7HN42-0AA0","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/3VA2340-7HN42-0AA0 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}}