{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2440-8KQ42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2440-8KQ42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2440-8KQ42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2440-8KQ42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2440-8KQ42-0AA0, molded case circuit breaker, 4-pole, 400 A rated, 440 kA at 240 V, line protection with communication and ground-fault monitoring.","salesMarkdown":"The Siemens SENTRON 3VA2440-8KQ42-0AA0 is a 4-pole molded case circuit breaker rated for 400 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed up to that ceiling. Its interrupting capacity hits 440 kA at 240 VAC, 330 kA at 415/440 V, and still delivers 220 kA at 500 V, 52.5 kA at 690 V. That SCCR headroom means it can sit at the main or feeder position in high-fault panels without cascading coordination issues upstream. ## Integration — panel fit and wiring notes The 4-pole footprint matches standard SENTRON 3VA panel cutouts; verify busbar and lug spacing against your existing switchboard layout. Power loss is 63.5 W maximum — account for thermal rise in a sealed enclosure.","metaTitle":"Siemens SENTRON 3VA2440-8KQ42-0AA0 MCCB, 400 A, 440 kA at 24","metaDescription":"Siemens SENTRON 3VA2440-8KQ42-0AA0 molded case circuit breaker, 400 A rated, 4-pole, 440 kA breaking capacity at 240 VAC. Active 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","title":"3VA2440-8KQ42-0AA0","Height":"248 mm","Maximum":"4 400 A","Minimum":"600 A","at 240 V":"440 kA","at 415 V":"330 kA","at 440 V":"330 kA","at 500 V":"220 kA","at 690 V":"52.5 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","description":"circuit breaker 3VA2 IEC frame 630 breaking capacity class L Icu=150kA @ 415V 4-pole, line protection ETU860, LSIG, In=400A overload protection Ir=160A...400A short-circuit protection Isd=0.6..10x In, Ii=1.5..11x In N conductor protection adjustable (OFF, up to 160%) gr.-fault prot., can be sw. off Ig=0.2...1 x In= tg=0.05-0.8s nut keeper kit","Initial Value":"80 A","Limited To 1 S":"5 kA","Trip Indicator":"No","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Full-Scale Value":"400 A","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Line protection","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","Ground-Fault Monitoring Version":"Summation current formation L + N conductor","Continuous Current / Rated Value":"400 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU860","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 20% to 130%","Product Function / Grounding Protection":"Yes","operating voltage / at AC / rated value":"690 V","reference code / according to IEC 81346-2":"Q","Continuous Current / Rated Value / Maximum":"630 A","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LSIG","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"L","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,"stockQuantity":0,"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=161116&mlfb=3VA2440-8KQ42-0AA0"},"ai":{"faq":[{"question":"Where can I buy 3VA2440-8KQ42-0AA0 and how is it quoted?","answer":"This part is sourced and quoted to order through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time."},{"question":"What are the key ratings of 3VA2440-8KQ42-0AA0?","answer":"Rated 400 A continuous (no derating from 40 °C to 70 °C), 4-pole, with interrupting capacity of 440 kA at 240 V, 330 kA at 415/440 V, 220 kA at 500 V, and 52.5 kA at 690 V."},{"question":"What compliance documentation does Siemens provide for this MCCB?","answer":"As a SENTRON molded case circuit breaker, it is designed to meet IEC/UL standards typical for the class. Specific RoHS, REACH, and UL documentation is available from Siemens upon request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2440-8KQ42-0AA0","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/3VA2440-8KQ42-0AA0 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}}