{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2040-8HN42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2040-8HN42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2040-8HN42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2040-8HN42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2040-8HN42-0AA0, molded case circuit breaker, 4-pole, 40 A continuous, ETU350 electronic trip unit, line protection design.","salesMarkdown":"The Siemens 3VA2040-8HN42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 40 A continuous current at 40 °C, with a 4-pole configuration and an ETU350 electronic trip unit. The 800 V rated insulation voltage and 440 kA interrupting capacity at 240 V give it headroom for high-fault service-entrance or sub-distribution applications where short-circuit current runs high. Interrupting ratings drop as line voltage rises: 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V. That 52.5 kA at 690 V is still well above typical industrial SCCR requirements for 600 V class panels, so this breaker doesn't force an upstream current-limiting fuse for most installations. The breaker measures 86 mm deep, 140 mm wide, and 181 mm high. That 140 mm width is the standard 4-pole MCCB footprint for this SENTRON frame size — it occupies four 35 mm DIN spaces if mounted on a DIN rail, or bolts into a panel-mount base. Verify the busbar or lug kit spacing against your existing panel layout, but the form factor matches the 3VA2 frame family. ## Trip unit and thermal performance Rated current holds flat at 40 A from 40 °C through 70 °C ambient — no derating needed across that range, which simplifies panel design in warm enclosures. Maximum power loss is 1.2 W per pole, negligible for ventilation planning. Operating temperature range is -25 °C to 70 °C; storage range extends from -40 °C to 80 °C.","metaTitle":"Siemens 3VA2040-8HN42-0AA0 SENTRON MCCB, 40 A, 4-Pole, ETU35","metaDescription":"Siemens 3VA2040-8HN42-0AA0 SENTRON molded case circuit breaker, 40 A rated, 4-pole, ETU350 release, 440 kA at 240 V. Current production. Quoted to order.","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":"3VA2040-8HN42-0AA0","Height":"181 mm","Maximum":"480 A","Minimum":"480 A","at 240 V":"440 kA","at 415 V":"330 kA","at 440 V":"330 kA","at 500 V":"220 kA","at 690 V":"52.5 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","description":"circuit breaker 3VA2 IEC frame 100 breaking capacity class L Icu=150kA @ 415V 4-pole, line protection ETU350, LSI, In=40A overload protection Ir=16A...40A short-circuit protection Isd=1.5...10 x Ir, Ii=12 x In N conductor protection adjustable (OFF, 100%) nut keeper kit","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":"1.2 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":"100 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":"L","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,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/0d9fdb679fa9a26fe2b855e091307751.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=459680&mlfb=3VA2040-8HN42-0AA0"},"ai":{"faq":[{"question":"Where can I buy 3VA2040-8HN42-0AA0 and how do I get a price?","answer":"We source and quote this part to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ through the storefront and we'll respond with a firm commercial offer."},{"question":"What is 3VA2040-8HN42-0AA0's listed depth?","answer":"The listed depth is 86 mm (3.39 in), with a width of 140 mm (5.51 in) and height of 181 mm (7.13 in)."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2040-8HN42-0AA0","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/3VA2040-8HN42-0AA0 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}}