{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2040-6HM42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2040-6HM42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2040-6HM42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2040-6HM42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2040-6HM42-0AA0, molded case circuit breaker, 4-pole, 40 A continuous rated current, 242 kA breaking capacity at 240 V AC.","salesMarkdown":"The Siemens 3VA2040-6HM42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 40 A continuous current across four poles, with a breaking capacity of 242 kA at 240 V AC. The 800 V rated insulation voltage (Ui) means it's built for 480 V and 600 V class systems as well, though the interrupting curve drops to 187 kA at 415/440 V and 121 kA at 500 V. The 40 A rating holds across the full ambient range from 40 °C to 70 °C — no derating needed in a warm enclosure. That's a solid advantage for panels packed near motors or drives. The 4-pole construction (switching all three phases plus neutral) is standard for TN-S or TT systems where you need neutral isolation. Ground-fault monitoring uses summation current formation on L + N, so it can detect residual current without a separate GFCI module. Physical footprint: 140 mm wide, 181 mm tall, 86 mm deep. That 86 mm depth is the dimension you'll need clearance for behind the panel door — it's the same depth class as the wider 3VA2 family, so a panel drilled for a 3VA2040-8HN42-0AA0 will accept this unit without rewiring or re-drilling the mounting holes.","metaTitle":"Siemens 3VA2040-6HM42-0AA0 SENTRON MCCB, 40 A, 4-Pole, 242 k","metaDescription":"Siemens 3VA2040-6HM42-0AA0 SENTRON molded case circuit breaker, 40 A rated, 4-pole, 242 kA breaking capacity at 240 V. Active production, sourced to order. Request a 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","Maximum":"480 A","Minimum":"60 A","at 240 V":"242 kA","at 415 V":"187 kA","at 440 V":"187 kA","at 500 V":"121 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","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":"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","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":"ETU330","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 100%","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":"100 A","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LIG","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"H","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/173bff78fe5159339c5774508e73c3af.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=360667&mlfb=3VA2040-6HM42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2040-6HM42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA2040-6HM42-0AA0 at 240 V?","answer":"242 kA at 240 V AC. At 415 V and 440 V it is 187 kA, at 500 V it is 121 kA, and at 690 V it is 3 kA."},{"question":"Will 3VA2040-6HM42-0AA0 drop into a panel drilled for 3VA2040-8HN42-0AA0?","answer":"Yes. Both share the same 140 mm width, 181 mm height, and 86 mm depth — the mounting footprint is identical, so no rewiring or re-drilling is needed."},{"question":"Where can I buy 3VA2040-6HM42-0AA0?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for current pricing and availability."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2040-6HM42-0AA0","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/3VA2040-6HM42-0AA0 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}}