{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1140-3EE42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1140-3EE42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1140-3EE42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1140-3EE42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1140-3EE42-0AA0, molded case circuit breaker, line protection, 4-pole, 40 A, TM220 thermal-magnetic trip unit, 75.6 kA at 240 V.","salesMarkdown":"The interrupting capacity varies by system voltage: 75.6 kA at 240 V, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. ## Temperature derating — the real continuous current At 55 °C it derates to 39 A, at 60 °C still 39 A, at 65 °C it drops to 38 A, and at 70 °C it's 37 A. That's a gentle slope — only 3 A lost over a 25 °C rise — so the thermal margin is comfortable for most enclosed panel installations. If your enclosure runs hot (say, above 55 °C), plan for the 39 A ceiling rather than the nameplate 40 A. It's a panel-mount MCCB — not a DIN-rail snap-on — so it bolts into a cutout or mounts on a backplate. Power loss is listed at 10.8 W maximum, which is modest for a 4-pole 40 A device and won't drive significant internal heating in a ventilated panel. ## Voltage and application notes The overcurrent release design is TM220, a thermal-magnetic type with fixed thermal and adjustable magnetic pickup; there is no ground-fault monitoring version and no N-conductor protection built in. Communication function is absent — this is a standalone breaker, not a metering or communicating device.","metaTitle":"Siemens 3VA1140-3EE42-0AA0 SENTRON MCCB, 40 A, 4-Pole, TM220","metaDescription":"Siemens SENTRON 3VA1140-3EE42-0AA0 molded case circuit breaker, 40 A continuous, 4-pole, TM220 thermal-magnetic trip, 75.6 kA at 240 V. Active production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"101.6 mm","Height":"130 mm","at 240 V":"75.6 kA","at 415 V":"52.5 kA","at 440 V":"32 kA","at 500 V":"11.9 kA","at 690 V":"11.9 kA","at 45 °C":"40 A","at 50 °C":"40 A","at 55 °C":"39 A","at 60 °C":"39 A","at 65 °C":"38 A","at 70 °C":"37 A","Depth [In]":"2.76 in","Width [In]":"4 in","Height [In]":"5.12 in","Number Of Poles":"4","Product version":"Line protection","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"10.8 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":"Without","Tension assignée d'isolement Ui":"800 V","Design Of The Overcurrent Release":"TM220","Design Of Short-Circuit Protection":"For switching power values in DC networks, see the 3VA molded case circuit breaker device manual; link to be found under Service & Support in the last chapter","protection class IP / on the front":"IP40","design of the N-conductor protection":"Without","reference code / acc. to IEC 81346-2":"Q","Max. rated operational voltage Ue with DC":"600 V","Product Extension / Optional / Motor Drive":"Yes","Adjustable response value current / li max.":"400 A","Adjustable response value current / li min.":"400 A","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"N","Max. rated operational current of the frame size":"160 A","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"17 x 6.5 mm","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"12 x 1 mm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/668afafa976b5ac19f1b2a76d3c3955e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=139884&mlfb=3VA1140-3EE42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1140-3EE42-0AA0/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1140-3EE42-0AA0","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/3VA1140-3EE42-0AA0 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}}