{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2040-4HM42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2040-4HM42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2040-4HM42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2040-4HM42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2040-4HM42-0AA0, molded case circuit breaker, 4-pole, 40 A, ETU330 electronic trip unit, line protection, 121 kA at 240 V.","salesMarkdown":"It carries a 121 kA interrupting rating at 240 V, dropping to 75.6 kA at 415 V and 440 V, 52.5 kA at 500 V, and 3 kA at 690 V — the high fault-current headroom at the lower voltages makes it a fit for main or feeder duty in panels where available fault current is substantial. N-conductor protection is adjustable OFF or 100%. Maximum power loss is 2.2 W — negligible for thermal budgeting inside a closed panel. Dimensions are 181 mm height, 140 mm width, 86 mm depth — the 140 mm width is the 4-pole form factor on this platform, so it occupies the same footprint as other 4-pole SENTRON 3VA breakers. Mounting is via screw terminals, not plug-in, so the panel builder wires directly to the lugs.","metaTitle":"Siemens 3VA2040-4HM42-0AA0 SENTRON MCCB, 4P, 40 A, ETU330, 1","metaDescription":"Siemens SENTRON 3VA2040-4HM42-0AA0 molded case circuit breaker, 4-pole, 40 A, ETU330 trip unit, 121 kA at 240 V. Current lifecycle. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"86 mm","Width":"140 mm","Height":"181 mm","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"75.6 kA","at 500 V":"52.5 kA","at 690 V":"3 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":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"2.2 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","rated insulation voltage Ui":"800 V","Courant permanent assigné Iu":"40 A","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 / according 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":"LIG","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"S","Max. rated operational current of the frame size":"100 A","Mechanical Service Life (Switching 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 , max.":"25 x 8 mm","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/7c653717d99004c0cff61d4c56c92234.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=490450&mlfb=3VA2040-4HM42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2040-4HM42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA2040-4HM42-0AA0?","answer":"Submit an RFQ through this listing; the part is sourced to order through independent distribution, with pricing and stock confirmed at quote time."},{"question":"Will 3VA2040-4HM42-0AA0 drop into a panel that was specified around 3VA2140-8JQ42-0AA0 without rewiring?","answer":"Both are 4-pole SENTRON 3VA breakers sharing the same 140 mm width and 181 mm height, so the mechanical footprint is identical. The 3VA2140-8JQ42-0AA0 carries a different trip unit and interrupting rating — verify the protection settings and SCCR before swapping, but the panel cutout and bus-bar spacing are the same."},{"question":"What compliance documentation does this brand provide for 3VA2040-4HM42-0AA0?","answer":"As a Siemens SENTRON MCCB, it carries CE marking for the European market and is designed to IEC 60947-2. RoHS and REACH declarations are standard with the product documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2040-4HM42-0AA0","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/3VA2040-4HM42-0AA0 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}}