{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2140-5HN42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2140-5HN42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2140-5HN42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2140-5HN42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA series, molded case circuit breaker (MCCB), 4-pole, 40 A continuous rating, ETU350 electronic trip unit, 187 kA breaking capacity at 240 V AC.","salesMarkdown":"## What this 40 A MCCB delivers — and what the ratings actually mean for your panel The Siemens SENTRON 3VA2140-5HN42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for 40 A continuous current across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling, which simplifies panel build in warm enclosures or near heat sources. Breaking capacity hits 187 kA at 240 V AC and 121 kA at 415/440 V, tapering to 75.6 kA at 500 V and 3.7 kA at 690 V — the 690 V figure is low enough that you need to verify coordination upstream if the service voltage sits near that ceiling. Dimensions are 181 mm height, 140 mm width, 86 mm depth — standard SENTRON 3VA footprint for a 4-pole frame at this rating. Power loss is rated at 1.6 W maximum — negligible for thermal budgeting inside a crowded panel.","metaTitle":"Siemens 3VA2140-5HN42-0AA0 SENTRON 4P MCCB, 40 A, ETU350, 18","metaDescription":"Siemens SENTRON 3VA2140-5HN42-0AA0 molded case circuit breaker, 4-pole, 40 A continuous, ETU350 electronic trip, 187 kA at 240 V. Current production. Quoted on request.","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","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"121 kA","at 500 V":"75.6 kA","at 690 V":"3.7 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","Product version":"Line protection","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"1.6 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","rated insulation voltage Ui":"800 V","Courant permanent assigné Iu":"40 A","Ground-Fault Monitoring Version":"Without","Design Of The Overcurrent Release":"ETU350","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 100%","operating voltage / at AC / rated value":"690 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Adjustable response value current / li max.":"480 A","Adjustable response value current / li min.":"480 A","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LSI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"M","Max. rated operational current of the frame size":"160 A","Mechanical Service Life (Switching 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","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"25 x 8 mm","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"13 x 1 mm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/cda978e31ec81fb539d5632cb59bd0b3.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=504043&mlfb=3VA2140-5HN42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2140-5HN42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Does this breaker include ground-fault monitoring or a communication module?","answer":"No — this variant has no ground-fault monitoring, no communication function, and no undervoltage release. It is a line-protection MCCB with the ETU350 trip unit."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2140-5HN42-0AA0","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/3VA2140-5HN42-0AA0 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}}