{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2140-8HM42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2140-8HM42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2140-8HM42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2140-8HM42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2140-8HM42-0AA0, molded case circuit breaker (MCCB), 4-pole, 40 A rated current, ETU330 electronic trip unit, line protection version, 440 kA breaking capacity at 240 V.","salesMarkdown":"## What this 40 A MCCB covers The Siemens SENTRON 3VA2140-8HM42-0AA0 is a 4-pole molded case circuit breaker (MCCB) sized for line protection at 40 A continuous current, flat across the ambient range from 40 °C to 70 °C — no derating needed up to that full 70 °C operating maximum. That 40 A rating holds at every temperature step in the spec, so you can size this into a warm panel without recalculating. Breaking capacity runs 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 — those numbers cover high-fault utility feeds and transformer secondaries. The ETU330 electronic trip unit handles the overcurrent release; N-conductor protection is adjustable OFF or 100%, and ground-fault monitoring uses summation current on L+N. Front IP40 keeps it sealed against tools and fingers in a closed enclosure. Four-pole MCCB, 140 mm wide — mounts into a standard SENTRON 3VA panel base or DIN-rail adapter. Front IP40 means it's touch-safe once the panel door is closed. Power loss is 1.2 W maximum — negligible for thermal budgeting inside a crowded enclosure.","metaTitle":"Siemens 3VA2140-8HM42-0AA0 SENTRON MCCB, 40 A, 4-Pole, 440 k","metaDescription":"Siemens SENTRON 3VA2140-8HM42-0AA0 molded case circuit breaker, 40 A, 4-pole, line protection, ETU330 release, 440 kA at 240 V. Current lifecycle. Sourced 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","Height":"181 mm","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","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":"1.2 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Courant permanent assigné Iu":"40 A","Ground-Fault Monitoring Version":"Summation current formation L + N conductor","Tension assignée d'isolement Ui":"800 V","Design Of The Overcurrent Release":"ETU330","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 100%","reference code / acc. to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Adjustable response value current / lg max.":"40 A","Adjustable response value current / lg min.":"16 A","Adjustable response value current / li max.":"480 A","Adjustable response value current / li min.":"60 A","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LIG","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"L","Max. rated operational current of the frame size":"160 A","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","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=105515&mlfb=3VA2140-8HM42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2140-8HM42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Does 3VA2140-8HM42-0AA0 have ground-fault protection?","answer":"Yes, ground-fault monitoring uses summation current formation on the L+N conductors."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2140-8HM42-0AA0","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/3VA2140-8HM42-0AA0 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}}