{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1120-3EE42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1120-3EE42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1120-3EE42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EE42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1120-3EE42-0AA0, molded case circuit breaker (MCCB), 4-pole, 20 A rated continuous current, TM220 thermal-magnetic release, line protection version, 76 kA interrupting at 240 V.","salesMarkdown":"The Siemens 3VA1120-3EE42-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for line protection in 4-pole configuration, carrying a continuous current of 20 A across the 40 °C to 55 °C band and derating to 19 A at 70 °C. Breaking capacity drops with system voltage: 76 kA at 240 V, 53 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. Front IP40 protection means the breaker face is splash-safe in a closed panel but not washdown-rated. The 4-pole body occupies the same width as a 3-pole plus neutral, so plan the gland plate accordingly.","metaTitle":"Siemens 3VA1120-3EE42-0AA0 SENTRON MCCB, 20A 4-Pole, 76kA","metaDescription":"Siemens 3VA1120-3EE42-0AA0 SENTRON molded case circuit breaker, 20A rated current, 4-pole, 76kA at 240V. TM220 release, line protection. Active 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":"70 mm","Width":"101.6 mm","Height":"130 mm","at 240 V":"76 kA","at 415 V":"53 kA","at 440 V":"32 kA","at 500 V":"11.9 kA","at 690 V":"11.9 kA","at 40 °C":"20 A","at 45 °C":"20 A","at 50 °C":"20 A","at 55 °C":"20 A","at 60 °C":"19 A","at 65 °C":"19 A","at 70 °C":"19 A","Depth [in]":"2.8 in","Width [in]":"4 in","Height [in]":"5.1 in","Number of poles":"4","Product version":"Line protection","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"20 000","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Power loss [W] / maximum":"12 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-40 °C","Other Measurement Function":"No","Rated continuous current Iu":"20 A","Rated insulation voltage Ui":"800 V","Ground fault monitoring version":"Without","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 DIN EN 81346-2":"Q","Max. rated operational voltage Ue with DC":"600 V","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"20 A","Adjustable response value current / li max.":"320 A","Adjustable response value current / li min.":"320 A","Adjustable response value current / lr min.":"14 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"0","Protective function of the overcurrent release":"LI","Switching capacity class of the circuit breaker":"N","Max. rated operational current of the frame size":"160 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"lug terminal","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/0d748d8c2ae305b7394e9ff0f93ad967.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=402606&mlfb=3VA1120-3EE42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1120-3EE42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting capacity of 3VA1120-3EE42-0AA0 at 240 V?","answer":"76 kA at 240 V, derating to 53 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V."},{"question":"What is the rated current and temperature derating for this MCCB?","answer":"Rated continuous current is 20 A from 40 °C through 55 °C, derating to 19 A at 60 °C through 70 °C."},{"question":"Where can I buy 3VA1120-3EE42-0AA0?","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/3VA1120-3EE42-0AA0","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/3VA1120-3EE42-0AA0 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}}