{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2040-5HN42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2040-5HN42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2040-5HN42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2040-5HN42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2040-5HN42-0AA0, molded case circuit breaker, 4-pole, 40 A continuous, ETU350 release, interrupting 187 kA at 240 V.","salesMarkdown":"The Siemens SENTRON 3VA2040-5HN42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 40 A continuous current across the full ambient range of 40 °C to 70 °C — no derating needed up to that ceiling. This MCCB interrupts 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V. The 187 kA figure at 240 V tells you it can handle a bolted fault on a large transformer secondary without the breaker failing — that's the kind of SCCR you need for a main breaker in a 480 V / 277 V panel fed by a 1000 kVA transformer. The drop to 3 kA at 690 V is typical for a 40 A frame; at that voltage the arc energy is higher, so the interrupting limit drops. For most industrial distribution at 480 V, the 121 kA rating gives you plenty of headroom. It's a panel-mount MCCB — no DIN-rail clip, so plan for screw-mounting on a backplate or in a distribution cabinet. The 4-pole design handles three-phase plus neutral, common for 480Y/277 V or 208Y/120 V systems where you need to switch the neutral.","metaTitle":"Siemens 3VA2040-5HN42-0AA0 SENTRON MCCB, 40 A, 4-Pole, 187 k","metaDescription":"Siemens SENTRON 3VA2040-5HN42-0AA0 molded case circuit breaker, 40 A continuous, 4-pole, interrupting up to 187 kA at 240 V. ETU350 release. Current lifecycle. Sourced to order aga","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":"187 kA","at 415 V":"121 kA","at 440 V":"121 kA","at 500 V":"75.6 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","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":"2.2 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":"M","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/e2a5d4031904c66db1eb1907428bcf71.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=341762&mlfb=3VA2040-5HN42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2040-5HN42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting capacity of this MCCB at 240 V?","answer":"It interrupts 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V."},{"question":"Where can I buy 3VA2040-5HN42-0AA0?","answer":"Sourced to order against an RFQ through independent distribution. Availability and current pricing confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2040-5HN42-0AA0","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/3VA2040-5HN42-0AA0 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}}