{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2440-6KQ42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2440-6KQ42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2440-6KQ42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2440-6KQ42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON molded case circuit breaker, 3VA2440-6KQ42-0AA0, 400 A, 4-pole, breaking capacity 242 kA at 240 V, ETU860 release, communication function.","salesMarkdown":"The Siemens SENTRON 3VA2440-6KQ42-0AA0 is a 4-pole molded case circuit breaker rated for 400 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel thermal budgeting in a crowded enclosure. Its breaking capacity hits 242 kA at 240 V and still holds 187 kA at 415 V and 440 V, so it handles high-fault utility feeds or transformer secondaries without cascading upstream. The ETU860 electronic trip unit gives adjustable N-conductor protection (OFF, 20% to 130%) and a communication function for integration into a plant monitoring network. At 415 V and 440 V it still clears 187 kA, dropping to 121 kA at 500 V and 9 kA at 690 V. ## Thermal performance and mounting The 4-pole frame measures 184 mm wide by 248 mm tall by 110 mm deep, which fits standard switchboard cubicle mounting patterns. Maximum power loss is 63.5 W, worth accounting for in enclosure ventilation if you're packing several breakers side by side.","metaTitle":"Siemens 3VA2440-6KQ42-0AA0 SENTRON MCCB, 400 A, 4-Pole, 242","metaDescription":"Siemens SENTRON 3VA2440-6KQ42-0AA0 molded case circuit breaker, 400 A, 4-pole, breaking capacity 242 kA at 240 V. Current lifecycle stage. Sourced to order. Request a quote.","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":"242 kA","at 415 V":"187 kA","at 440 V":"187 kA","at 500 V":"121 kA","at 690 V":"9 kA","at 40 °C":"400 A","at 45 °C":"400 A","at 50 °C":"400 A","at 55 °C":"400 A","at 60 °C":"400 A","at 65 °C":"400 A","at 70 °C":"400 A","Depth [In]":"4.33 in","Width [In]":"7.24 in","Height [In]":"9.76 in","Limited To 1 S":"5 kA","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":"Yes","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"63.5 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"Yes","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":"ETU860","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 20% to 130%","at AC / limited to 0.5 s / rated value":"5 kA","reference code / according 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.":"6 000 A","Adjustable response value current / li min.":"600 A","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LSIG","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"H","Max. rated operational current of the frame size":"630 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,"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=68837&mlfb=3VA2440-6KQ42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2440-6KQ42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA2440-6KQ42-0AA0 and get a price?","answer":"This part is sourced to order through independent distribution. Submit an RFQ; availability and current pricing are confirmed at quote time."},{"question":"What are the key ratings of 3VA2440-6KQ42-0AA0?","answer":"It is a 4-pole molded case circuit breaker rated 400 A continuous (no derating up to 70 °C), with a breaking capacity of 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 9 kA at 690 V. The electronic trip unit is an ETU860 with adjustable N-conductor protection and communication capability."},{"question":"What is the depth of this MCCB?","answer":"The depth is 110 mm (4.33 in)."},{"question":"What compliance documentation is available for this part?","answer":"The evidence does not list specific compliance certificates (RoHS, REACH, UL, IEC) for this order code. Standard Siemens SENTRON MCCBs typically carry IEC 60947-2 and UL 489 certifications; confirm the exact documentation package with your order."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2440-6KQ42-0AA0","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/3VA2440-6KQ42-0AA0 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}}