{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2040-4HL42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2040-4HL42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2040-4HL42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2040-4HL42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2040-4HL42-0AA0, molded case circuit breaker, 4-pole, 40 A rated continuous, ETU320 electronic trip unit, 121 kA interrupting at 240 V AC.","salesMarkdown":"The Siemens 3VA2040-4HL42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 40 A continuous current across a 4-pole configuration, using an ETU320 electronic trip unit. It's designed for line protection in distribution panels, sized at 140 mm wide, 181 mm tall, and 86 mm deep — a standard footprint for this frame class. ## Breaking capacity and trip curve Interrupting capacity hits 121 kA at 240 V AC, dropping to 75.6 kA at 415 V and 440 V, then 52.5 kA at 500 V, and 3 kA at 690 V. That 121 kA figure at 240 V means it handles high-fault scenarios common in industrial service-entrance or sub-distribution boards — you're not derating for available fault current on most 240 V feeds. The ETU320 electronic trip allows adjustable long-time, short-time, and instantaneous settings, so you dial in coordination with downstream breakers without swapping trip units. ## Thermal derating and environment Rated 40 A continuously from 40 °C all the way up to 70 °C ambient — no derating needed across that span, which is unusual for a 40 A frame. That means it holds its full rating in a hot panel or near a transformer without recalculating. Operating range is -25 °C to 70 °C; storage from -40 °C to 80 °C.","metaTitle":"Siemens 3VA2040-4HL42-0AA0 SENTRON MCCB, 40 A, 4-Pole, ETU32","metaDescription":"Siemens 3VA2040-4HL42-0AA0 SENTRON molded case circuit breaker, 40 A rated, 4-pole, ETU320 electronic trip, 121 kA at 240 V. Active production. 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","Maximum":"480 A","Minimum":"60 A","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","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":"ETU320","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":"LI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"S","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/e4b2a03e8e58361eb82fe85307c72859.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=27860&mlfb=3VA2040-4HL42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2040-4HL42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA2040-4HL42-0AA0 at 240 V?","answer":"121 kA at 240 V AC, dropping to 75.6 kA at 415 V and 440 V, 52.5 kA at 500 V, and 3 kA at 690 V."},{"question":"Where can I buy 3VA2040-4HL42-0AA0 and how is it quoted?","answer":"Sourced and quoted 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/3VA2040-4HL42-0AA0","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/3VA2040-4HL42-0AA0 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}}