{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1340-4GF42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1340-4GF42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1340-4GF42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1340-4GF42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1340-4GF42-0AA0, 4-pole molded case circuit breaker, 400 A continuous, interrupting 121 kA at 240 VAC, TM240 thermal-magnetic release.","salesMarkdown":"## Line protection MCCB with TM240 release The Siemens SENTRON 3VA1340-4GF42-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, carrying 400 A continuous at 40 °C and interrupting up to 121 kA at 240 VAC. The TM240 thermal-magnetic release handles overload and short-circuit curves without electronic adjustment — a fixed-trip design that simplifies specification for distribution panels where selectivity is set by frame size and cable impedance, not by dials. ## Interrupting capacity across voltage levels Breaking capacity drops with system voltage: 121 kA at 240 V, 75.6 kA at both 415 V and 440 V, 52.5 kA at 500 V, and 11.9 kA at 690 V. For a 400 V distribution board, the 75.6 kA figure covers most transformer-fed fault levels; the 690 V rating is worth noting for mining or marine installations where a single MCCB must clear a high-impedance fault on a 690 V bus. Rated 400 A through 50 °C ambient; above that the TM240 release derates linearly — 392 A at 55 °C, 384 A at 60 °C, 376 A at 65 °C, 367 A at 70 °C. Dimensions are 184 mm wide, 248 mm high, 110 mm deep — a 4-pole frame that occupies roughly 7.24 by 9.76 inches of panel face. The 92.1 W maximum power loss should be factored into enclosure thermal calculations, especially in a sealed stainless cabinet.","metaTitle":"Siemens 3VA1340-4GF42-0AA0 SENTRON MCCB, 4-pole, 400 A, 121","metaDescription":"Siemens 3VA1340-4GF42-0AA0 SENTRON molded case circuit breaker, 4-pole, 400 A continuous, 121 kA interrupting at 240 VAC. 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":"110 mm","Width":"184 mm","Height":"248 mm","Maximum":"4 000 A","Minimum":"2 000 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":"11.9 kA","at 40 °C":"400 A","at 45 °C":"400 A","at 50 °C":"400 A","at 55 °C":"392 A","at 60 °C":"384 A","at 65 °C":"376 A","at 70 °C":"367 A","Depth [In]":"4.33 in","Width [In]":"7.24 in","Height [In]":"9.76 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":"92.1 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Ground-Fault Monitoring Version":"Without","Continuous Current / Rated Value":"400 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"TM240","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":"100%","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"600 V","reference code / according to IEC 81346-2":"Q","Continuous Current / Rated Value / Maximum":"400 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":"20 000","Type Of Electrical Connection / For Main Current Circuit":"nut keeper kit on both ends","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/f59d8c360c846d5ff9ef773daebb7908.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=569002&mlfb=3VA1340-4GF42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1340-4GF42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What are the interrupting ratings for 3VA1340-4GF42-0AA0?","answer":"121 kA at 240 V, 75.6 kA at 415 V and 440 V, 52.5 kA at 500 V, and 11.9 kA at 690 V."},{"question":"What is the continuous current rating of 3VA1340-4GF42-0AA0?","answer":"400 A continuous at 40 °C, with thermal derating above 50 °C down to 367 A at 70 °C."},{"question":"Where can I buy 3VA1340-4GF42-0AA0?","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/3VA1340-4GF42-0AA0","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/3VA1340-4GF42-0AA0 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}}