{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2040-7HN42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2040-7HN42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2040-7HN42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2040-7HN42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON series, molded case circuit breaker (MCCB), order code 3VA2040-7HN42-0AA0, 40 A rated continuous current, 4-pole, ETU350 electronic trip unit, interrupting ratings to 330 kA.","salesMarkdown":"That's unusual for a thermal-magnetic breaker; the ETU350 electronic trip unit holds the rating flat through the temperature band, so you don't lose headroom on a hot switchgear lineup. Four poles give you full switching and protection on three-phase plus neutral. The interrupting ratings climb to 330 kA at 240 VAC and stay above 240 kA through 440 VAC, dropping to 187 kA at 500 V and 3 kA at 690 V — that's a high-fault package for a 40 A frame, sized for industrial mains where available fault current is substantial. If you need those, this isn't the trim. ## Panel fit — dimensions and IP rating Footprint is 140 mm wide by 181 mm tall by 86 mm deep — a standard 4-pole MCCB envelope that drops into most SENTRON 3VA switchboard and panelboard layouts without re-drilling gland plates.","metaTitle":"Siemens 3VA2040-7HN42-0AA0 SENTRON MCCB, 40 A, 4-Pole, ETU35","metaDescription":"Siemens SENTRON 3VA2040-7HN42-0AA0 molded case circuit breaker, 40 A continuous, 4-pole, ETU350 release. Interrupting 330 kA at 240 V. Current lifecycle stage. Sourced to order. Re","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":"330 kA","at 415 V":"242 kA","at 440 V":"242 kA","at 500 V":"187 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":"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":"C","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/e6ba3a63652745d3dd346f81f197fc5f.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=436705&mlfb=3VA2040-7HN42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2040-7HN42-0AA0/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2040-7HN42-0AA0","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/3VA2040-7HN42-0AA0 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}}