{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2140-7HK42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2140-7HK42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2140-7HK42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2140-7HK42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2140-7HK42-0AA0, molded case circuit breaker, 4-pole, 40 A, ETU340 release, breaking capacity 330 kA at 240 V.","salesMarkdown":"## Line protection MCCB with full-temperature rating The Siemens 3VA2140-7HK42-0AA0 is a SENTRON molded case circuit breaker rated for line protection, 4-pole, with a continuous current Iu of 40 A that holds flat across the entire operating range — 40 A at 40 °C, 45 °C, 50 °C, 55 °C, 60 °C, 65 °C, and 70 °C. That means no derating curve to chase in a warm panel; the 40 A rating is good right up to the maximum ambient of 70 °C. Breaking capacity is specified per voltage: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 53 kA at 690 V. At 415 V, the 242 kA figure covers most industrial distribution panels with high fault current — no need for current-limiting fuses upstream for typical installations within that range. ## ETU340 release and selectivity The overcurrent release is an ETU340, a microprocessor-based unit with adjustable N-conductor protection (OFF or 100%) and a fixed time delay tr of 1300 ms. The fixed tr simplifies coordination — you know the long-time delay is 1.3 s, no guesswork on the curve. The 20 000 electrical endurance cycles (latching) suit it for frequent switching applications like main incomers or feeder breakers in production lines.","metaTitle":"Siemens 3VA2140-7HK42-0AA0 SENTRON MCCB, 40 A, 4-Pole, 240 V","metaDescription":"Siemens 3VA2140-7HK42-0AA0 SENTRON molded case circuit breaker, 40 A at 70 °C, 4-pole, ETU340 release, breaking capacity 330 kA at 240 V. Active production, sourced to order. Reque","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"86 mm","Width":"140 mm","title":"3VA2140-7HK42-0AA0","Height":"181 mm","at 240 V":"330 kA","at 415 V":"242 kA","at 440 V":"242 kA","at 500 V":"187 kA","at 690 V":"53 kA","at 40 °C":"40 A","at 45 °C":"40 A","at 50 °C":"40 A","at 55 °C":"40 A","at 60 °C":"40 A","at 65 °C":"40 A","at 70 °C":"40 A","Depth [in]":"3.4 in","Width [in]":"5.5 in","Height [in]":"7.1 in","description":"circuit breaker 3VA2 IEC frame 160 breaking capacity class C Icu=110kA @ 415V 4-pole, line protection ETU340, ELISA LI, In=40A overload protection Ir=16A...40A short-circuit protection Ii=15 x In N conductor protection adjustable (OFF, 100%) nut keeper kit","Number of poles":"4","Product version":"Line protection","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"20 000","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Power loss [W] / maximum":"1.6 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-40 °C","Other Measurement Function":"No","Rated continuous current Iu":"40 A","Rated insulation voltage Ui":"800 V","Ground fault monitoring version":"Without","Design of the overcurrent release":"ETU340","Protection class IP / on the front":"IP40","Design of the N-conductor protection":"adjustable OFF; 100%","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"1300","Adjustable response value time / tr min.":"1300","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"40 A","Adjustable response value current / li max.":"600 A","Adjustable response value current / li min.":"600 A","Adjustable response value current / lr min.":"16 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"0","Protective function of the overcurrent release":"ELISA LI","Switching capacity class of the circuit breaker":"C","Max. rated operational current of the frame size":"160 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"Lug terminal","Arrangement of electrical connectors / for main current circuit":"Front terminal"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cda978e31ec81fb539d5632cb59bd0b3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=289254&mlfb=3VA2140-7HK42-0AA0"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA2140-7HK42-0AA0 at 415 V?","answer":"242 kA at 415 V, and the same at 440 V. At 240 V it reaches 330 kA."},{"question":"Does this MCCB derate at higher ambient temperatures?","answer":"No — the 40 A rating holds flat from 40 °C up to 70 °C ambient. No derating needed within that range."},{"question":"Where can I buy the 3VA2140-7HK42-0AA0?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2140-7HK42-0AA0","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/3VA2140-7HK42-0AA0 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}}