{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2140-7KQ42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2140-7KQ42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2140-7KQ42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2140-7KQ42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2 series, molded case circuit breaker, 4-pole, 40 A, ETU860 electronic trip unit, 330 kA at 240 V interrupting rating, line protection version, IP40 front, communication capable.","salesMarkdown":"The Siemens 3VA2140-7KQ42-0AA0 is a SENTRON molded case circuit breaker (MCCB) in the 3VA2 line-protection series, carrying 40 A continuous current flat across 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel thermal budgeting. Interrupting capacity reaches 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.7 kA at 690 V — figures that place this breaker squarely in high-fault-duty distribution, not branch-circuit-only applications. The breaker occupies 140 mm width × 181 mm height × 86 mm depth — a 4-pole MCCB footprint that fits standard Siemens 3VA2 mounting bases and busbar systems. The 86 mm depth (3.39 in) is the dimension from the mounting plane to the farthest rear projection; verify gland-plate clearance and door swing before committing the panel layout. The IP40 front face accepts standard padlockable handle mechanisms and auxiliary contact add-ons. ## Communication and monitoring capability The ETU860 trip unit supports communication functions and other measurement functions, which means it can report trip data, load profiles, and event logs over a digital bus when paired with the appropriate communication module — a feature set that matters for predictive maintenance and remote troubleshooting on a production line. The ground-fault monitoring version uses summation current formation on the L+N conductor, so it detects residual currents without a separate core-balance transformer.","metaTitle":"Siemens 3VA2140-7KQ42-0AA0 SENTRON MCCB, 40 A, 4-Pole, ETU86","metaDescription":"Siemens 3VA2140-7KQ42-0AA0 SENTRON molded case circuit breaker, 40 A continuous, 4-pole, ETU860 electronic trip unit, 330 kA at 240 V interrupting rating. Current production. Quote","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","at 240 V":"330 kA","at 415 V":"242 kA","at 440 V":"242 kA","at 500 V":"187 kA","at 690 V":"3.7 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","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":"1.6 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"Yes","Courant permanent assigné Iu":"40 A","Ground-Fault Monitoring Version":"Summation current formation L + N conductor","Tension assignée d'isolement Ui":"800 V","Design Of The Overcurrent Release":"ETU860","protection class IP / on the front":"IP40","reference code / acc. to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Adjustable response value current / lg max.":"40 A","Adjustable response value current / lg min.":"16 A","Adjustable response value current / li max.":"480 A","Adjustable response value current / li min.":"60 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":"C","Max. rated operational current of the frame size":"160 A","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","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"13 x 1 mm"}},"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=246219&mlfb=3VA2140-7KQ42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2140-7KQ42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting rating of 3VA2140-7KQ42-0AA0 at 240 V?","answer":"The interrupting rating is 330 kA at 240 V, which qualifies it for high-fault-current distribution panels where fault levels exceed typical branch-circuit MCCB ratings."},{"question":"Where can I buy 3VA2140-7KQ42-0AA0 and how is it quoted?","answer":"This part is sourced through independent industrial-automation distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — no stock count or price is published here."},{"question":"Does 3VA2140-7KQ42-0AA0 include ground-fault protection?","answer":"Yes, the ETU860 trip unit provides ground-fault monitoring via summation current formation on the L+N conductor, detecting residual currents without a separate external CT."},{"question":"What is the depth of 3VA2140-7KQ42-0AA0?","answer":"The depth is 86 mm (3.39 in), measured from the mounting plane to the farthest rear projection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2140-7KQ42-0AA0","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/3VA2140-7KQ42-0AA0 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}}