{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2040-8HM42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2040-8HM42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2040-8HM42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2040-8HM42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2040-8HM42-0AA0, 4-pole molded case circuit breaker, 40 A rated continuous current, ETU330 electronic trip unit, 440 kA breaking capacity at 240 V.","salesMarkdown":"## SENTRON 3VA2040-8HM42-0AA0 — 4-pole MCCB with ETU330 trip unit The Siemens SENTRON 3VA2040-8HM42-0AA0 is a 4-pole molded case circuit breaker rated for 40 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed in typical enclosed panel conditions. Breaking capacity reaches 440 kA at 240 V, 330 kA at 415/440 V, 220 kA at 500 V, and 53 kA at 690 V, covering high-fault installations. The ETU330 electronic trip unit provides adjustable long-time delay (tr) from 0.5 s to 17 s and N-conductor protection configurable to OFF or 100%. Ground fault monitoring uses summation current formation on L+N.","metaTitle":"Siemens 3VA2040-8HM42-0AA0 SENTRON MCCB, 4P, 40 A, 440 kA at","metaDescription":"Siemens SENTRON 3VA2040-8HM42-0AA0 molded case circuit breaker, 4-pole, 40 A rated current, 440 kA breaking capacity at 240 V. ETU330 electronic trip. Current lifecycle stage. Sour","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","title":"3VA2040-8HM42-0AA0","Height":"181 mm","at 240 V":"440 kA","at 415 V":"330 kA","at 440 V":"330 kA","at 500 V":"220 kA","at 690 V":"53 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]":"3.4 in","Width [in]":"5.5 in","Height [in]":"7.1 in","description":"circuit breaker 3VA2 IEC frame 100 breaking capacity class L Icu=150kA @ 415V 4-pole, line protection ETU330, LIG, In=40A overload protection Ir=16A...40A short-circuit protection Ii=1.5...12 x In N conductor protection adjustable (OFF, 100%) ground-fault protection Ig=0.4...1 x In= tg=0.1/0.3s nut keeper kit","Number of poles":"4","Product version":"Line protection","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"20 000","Communication Function":"No","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":"-40 °C","Other Measurement Function":"No","Rated continuous current Iu":"40 A","Rated insulation voltage Ui":"800 V","Ground fault monitoring version":"Summation current formation L + N conductor","Design of the overcurrent release":"ETU330","Protection class IP / on the front":"IP40","Design of the N-conductor protection":"adjustable OFF; 100%","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"17","Adjustable response value time / tr min.":"0.5","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"40 A","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","Adjustable response value current / lr min.":"16 A","Adjustable response value current / tg max.":"0.3 s","Adjustable response value current / tg min.":"0.1 s","Ground fault protection can be switched ON/OFF":"No","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"0","Protective function of the overcurrent release":"LIG","Switching capacity class of the circuit breaker":"L","Max. rated operational current of the frame size":"100 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"Lug terminal","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/7506bfae3f6be7420eb1707f14d07466.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=113923&mlfb=3VA2040-8HM42-0AA0"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA2040-8HM42-0AA0 at different voltages?","answer":"440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 53 kA at 690 V."},{"question":"Will 3VA2040-8HM42-0AA0 drop into a panel specified for 3VA2040-8HN42-0AA0 without rewiring?","answer":"Both are 4-pole 40 A SENTRON 3VA breakers with the same physical footprint (86 mm deep × 140 mm wide × 181 mm high) and 40 A rating. The key difference is the trip unit: 3VA2040-8HM42-0AA0 uses an ETU330 electronic trip, while the -8HN42 variant uses a different trip design. Mechanical fit is identical, but verify the trip curve and protection settings match your application before swapping."},{"question":"How do I get current pricing and availability for 3VA2040-8HM42-0AA0?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for quote (RFQ) and we will confirm current pricing and availability at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2040-8HM42-0AA0","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/3VA2040-8HM42-0AA0 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}}