{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2440-7HK42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2440-7HK42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2440-7HK42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2440-7HK42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2440-7HK42-0AA0, molded case circuit breaker, 4-pole, 400 A, ETU340 electronic overcurrent release, 330 kA at 240 V.","salesMarkdown":"That 400 A holds flat through 50 °C — no derating needed until you push past 55 °C, where it steps down to 384 A at 55 °C, 372 A at 60 °C, 356 A at 65 °C, and 340 A at 70 °C. For a cement plant or kiln control room running hot, this means you can size the breaker at its full 400 A nameplate if your enclosure ambient stays under 50 °C; above that, you read the thermal curve directly off the spec. Breaking capacity is the headline number that decides fault coordination: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 13 kA at 690 V. That 330 kA at 240 V is high enough for most secondary-side transformer feeds or large motor control center mains; the 13 kA at 690 V still clears a solid fault on a 690 V line, but you'll want to verify the available fault current at that voltage before committing the BOM line. ## ETU340 trip unit and N-conductor protection The ETU340 is an electronic overcurrent release with adjustable N-conductor protection — configurable to OFF, 50 %, or 100 % of the phase current. That matters on a 4-pole breaker feeding a line with a neutral that may carry harmonic content or unbalanced return current; you set the N-pole protection level to match the load, not just leave it at a fixed ratio. The trip time is fixed at 1500 ms (tr min and tr max both read 1500), so this is not a short-time adjustable unit — it's sized for selective coordination where the downstream breakers clear faster, and this one waits for them. ## Panel fit — dimensions and environment Dimensions: 248 mm high, 184 mm wide, 110 mm deep.","metaTitle":"Siemens 3VA2440-7HK42-0AA0 SENTRON MCCB, 400 A, 4-Pole, ETU3","metaDescription":"Siemens SENTRON 3VA2440-7HK42-0AA0 molded case circuit breaker, 400 A rated continuous current, 4-pole, ETU340 electronic trip, 330 kA at 240 V. Current production. Quoted to order","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","at 240 V":"330 kA","at 415 V":"242 kA","at 440 V":"242 kA","at 500 V":"187 kA","at 690 V":"13 kA","at 40 °C":"400 A","at 45 °C":"400 A","at 50 °C":"400 A","at 55 °C":"384 A","at 60 °C":"372 A","at 65 °C":"356 A","at 70 °C":"340 A","Depth [in]":"4.3 in","Width [in]":"7.2 in","Height [in]":"9.8 in","Number of poles":"4","Product version":"Line protection","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"15 000","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Power loss [W] / maximum":"63.3 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-40 °C","Other Measurement Function":"No","Rated continuous current Iu":"400 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; 50%; 100%","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"1500","Adjustable response value time / tr min.":"1500","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"400 A","Adjustable response value current / li max.":"6 000 A","Adjustable response value current / li min.":"6 000 A","Adjustable response value current / lr min.":"160 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":"630 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,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0eb36652ce522f093395d6bd0dd27e34.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=568776&mlfb=3VA2440-7HK42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2440-7HK42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA2440-7HK42-0AA0 and how do I 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 quote."},{"question":"What is 3VA2440-7HK42-0AA0's listed depth and width?","answer":"Depth is 110 mm, width is 184 mm, height is 248 mm — a standard 4-pole MCCB footprint."},{"question":"What breaking capacity does this MCCB carry at 240 V?","answer":"330 kA at 240 V, stepping down to 242 kA at 415 V and 440 V, 187 kA at 500 V, and 13 kA at 690 V."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2440-7HK42-0AA0","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/3VA2440-7HK42-0AA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}