{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1340-4EF42-0BB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1340-4EF42-0BB0","canonicalUrl":"https://aoctrl.com/siemens/3VA1340-4EF42-0BB0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1340-4EF42-0BB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1340-4EF42-0BB0, 4-pole molded case circuit breaker, 400 A rated current, 121 kA breaking capacity at 240 V, line protection design with undervoltage release.","salesMarkdown":"The Siemens 3VA1340-4EF42-0BB0 is a 4-pole SENTRON molded case circuit breaker (MCCB) rated for 400 A at 40 °C, with a breaking capacity of 121 kA at 240 V and 75.6 kA at 415 V — numbers that tell you this breaker handles heavy fault currents without cascading upstream. At 240 V the interrupting rating hits 121 kA — that's enough for high-fault locations like a turbine pad-mount transformer secondary or a large motor control center bus. The rating drops to 75.6 kA at 415 V and 52.5 kA at 500 V, and to 11.9 kA at 690 V, so match the available fault current at the installation point. The continuous current holds at 400 A through 50 °C, then derates to 392 A at 55 °C and 376 A at 70 °C — a gentle slope that buys you margin in a warm enclosure. The 3VA1340-4EF42-0BB0 measures 248 mm high by 184 mm wide by 110 mm deep — a 4-pole frame that fits standard Siemens SENTRON mounting patterns.","metaTitle":"Siemens 3VA1340-4EF42-0BB0 SENTRON MCCB, 400 A, 121 kA","metaDescription":"Siemens 3VA1340-4EF42-0BB0 SENTRON molded case circuit breaker, 4-pole, 400 A at 40 °C, breaking capacity 121 kA at 240 V. Active production. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"110 mm","Width":"184 mm","Height":"248 mm","Maximum":"0 A","Minimum":"0 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":"Yes","Design Of The Product":"Line protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"94.6 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA13404EF420AA0","Design Of The Auxiliary Switch":"2 auxiliary switches HP","Design Of The Auxiliary Release":"undervoltage release (UVR)","Ground-Fault Monitoring Version":"Without","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":"without","Of The Integrated Auxiliary Trip Unit":"3VA9608-0BB11","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","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA11","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=1399588&mlfb=3VA1340-4EF42-0BB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1340-4EF42-0BB0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1340-4EF42-0BB0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What are the key ratings of 3VA1340-4EF42-0BB0?","answer":"It is a 4-pole MCCB rated 400 A at 40 °C with a breaking capacity of 121 kA at 240 V, 75.6 kA at 415 V, and 11.9 kA at 690 V. It includes an undervoltage release and two auxiliary switches HP."},{"question":"What is the operating temperature range?","answer":"The operating range is -25 to 70 °C, with storage from -40 to 80 °C."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1340-4EF42-0BB0","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/3VA1340-4EF42-0BB0 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}}