{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2140-8KQ42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2140-8KQ42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2140-8KQ42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2140-8KQ42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2140-8KQ42-0AA0, molded case circuit breaker (MCCB) for line protection, 4-pole, 40 A rated continuous current, breaking capacity 440 kA at 240 V AC, communication-capable, ground-fault monitoring via summation current.","salesMarkdown":"## What this 3VA breaker does on a live line Breaking capacity hits 440 kA at 240 V AC, 330 kA at 415 V, and still 52.5 kA at 690 V — that's enough to handle high-fault utility feeds or transformer secondaries without needing a current-limiting fuse upstream. It carries a communication function and ground-fault monitoring via summation current of L+N conductors, so it can talk to a PLC or BMS for remote trip indication and leakage detection — no separate ground-fault relay needed on the same feeder. That 86 mm depth (3.39 in) matters when you're squeezing it into a shallow back-panel enclosure — measure gland-plate clearance before you drill. Power loss is 1.2 W max — negligible for thermal budgeting, but if you're packing a dozen of these in a row, it adds up. No undervoltage release fitted, so it won't drop out on a brownout; that's by design for line-protection duty where nuisance tripping is worse than riding through a sag. The 4-pole construction covers three-phase plus neutral switching — common for North American service-entrance or European TN-S systems.","metaTitle":"SENTRON 3VA2140-8KQ42-0AA0 MCCB, 40 A, 4-Pole, 440 kA at 240","metaDescription":"SENTRON 3VA2140-8KQ42-0AA0 molded case circuit breaker, 40 A rated, 4-pole, breaking capacity 440 kA at 240 V. Current lifecycle stage. Sourced to order via RFQ. Get current pricin","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","Height":"181 mm","Maximum":"480 A","Minimum":"60 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":"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]":"3.39 in","Width [In]":"5.51 in","Height [In]":"7.13 in","Initial Value":"16 A","Trip Indicator":"No","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Full-Scale Value":"40 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":"1.2 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":"40 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; 40% to 160%","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":"160 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":"25 000","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/cda978e31ec81fb539d5632cb59bd0b3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=392157&mlfb=3VA2140-8KQ42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2140-8KQ42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA2140-8KQ42-0AA0?","answer":"Sourced to order through independent distribution. Submit an RFQ — availability and current pricing are confirmed at quote time. No stock count or lead-time number is published here."},{"question":"What is 3VA2140-8KQ42-0AA0's depth?","answer":"86 mm (3.39 inches). That measurement is the body depth; account for additional clearance for wiring and the handle throw when laying out the panel."},{"question":"What compliance documentation does this brand provide?","answer":"As a Siemens SENTRON MCCB, it carries the usual CE, UL, CSA, and IEC certifications for molded case circuit breakers. Exact listing numbers and country-specific declarations are available in the product documentation pack."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2140-8KQ42-0AA0","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/3VA2140-8KQ42-0AA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-09-02T08:15:54.622Z","lastPublished":"2026-09-02T08:15:54.622Z","indexable":true}}