{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2140-7HN42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2140-7HN42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2140-7HN42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2140-7HN42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA series molded case circuit breaker, 3VA2140-7HN42-0AA0, 40 A rated continuous current, 4-pole, ETU350 electronic trip unit, line protection design.","salesMarkdown":"The Siemens SENTRON 3VA2140-7HN42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 40 A continuous current, built for line protection in distribution panels. ## Breaking capacity and what it means for your panel At 415 V and 440 V it still holds 242 kA, and at 500 V it's rated 187 kA. The 690 V figure drops to 3.7 kA, so if you're on a 690 V system this breaker is only suitable for low-fault locations downstream of a current-limiting device. The 40 A rating holds flat from 40 °C all the way up to 70 °C ambient — no derating needed in a warm enclosure. Operating temperature floor is -25 °C, storage from -40 °C to 80 °C. That means it's fine for unheated electrical rooms or outdoor enclosures in temperate climates, but if you're in a deep-freeze warehouse verify the -25 °C minimum is sufficient. Dimensions are 181 mm high, 140 mm wide, 86 mm deep. The 140 mm width is standard for a 4-pole MCCB in this frame size — it occupies four 35 mm DIN-rail modules.","metaTitle":"Siemens 3VA2140-7HN42-0AA0 SENTRON MCCB, 40 A, 4-Pole, ETU35","metaDescription":"Siemens SENTRON 3VA2140-7HN42-0AA0 molded case circuit breaker, 40 A continuous, 4-pole, ETU350 trip unit. Breaking capacity 330 kA at 240 V. Current lifecycle status. Quoted to or","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":"480 A","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","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Line protection","Communication Function":"No","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":"No","Ground-Fault Monitoring Version":"Without","Continuous Current / Rated Value":"40 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU350","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 100%","Product Function / Grounding Protection":"No","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":"LSI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"C","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=346337&mlfb=3VA2140-7HN42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2140-7HN42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA2140-7HN42-0AA0 and 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 price and lead time."},{"question":"What does the ETU350 trip unit mean for coordination?","answer":"The ETU350 is an electronic trip unit with adjustable overload pickup and short-time delay, plus fixed instantaneous. That gives you selectivity with downstream breakers — you can delay the trip on a high-level fault to let a downstream device clear first, which a thermal-magnetic cannot do."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2140-7HN42-0AA0","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/3VA2140-7HN42-0AA0 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}}