{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1340-5EF42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1340-5EF42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1340-5EF42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1340-5EF42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1340-5EF42-0AA0, molded case circuit breaker, 4-pole, 400 A, TM240 thermal-magnetic release, line protection, IP40 front.","salesMarkdown":"## 400 A MCCB with TM240 Release It carries a TM240 thermal-magnetic overcurrent release, meaning the thermal pickup and magnetic trip are set for a 400 A frame — no electronic adjustment, just reliable bimetal and solenoid response for motor and feeder circuits. The interrupting ratings are serious: 187 kA at 240 V, 121 kA at 415 V, and still 11.9 kA at 690 V, so it handles high-fault utility feeds or transformer secondaries without needing a current-limiting fuse upstream. ## Current Carrying and Thermal Derating Above that it derates in steps: 392 A at 55 °C, 384 A at 60 °C, 376 A at 65 °C, and 367 A at 70 °C. The maximum power loss is 92.1 W, so ventilation matters in a sealed enclosure. No end-of-life notice or successor has been issued for the 3VA1340-5EF42-0AA0. Storage range is wider: -40 °C to 80 °C, which matters if you're warehousing spares in an unheated building.","metaTitle":"Siemens 3VA1340-5EF42-0AA0 SENTRON MCCB, 400 A, 4-Pole, TM24","metaDescription":"Siemens 3VA1340-5EF42-0AA0 SENTRON molded case circuit breaker, 400 A continuous at 40 °C, 4-pole, TM240 release. 187 kA interrupting 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":"110 mm","Width":"184 mm","Height":"248 mm","Maximum":"0 A","Minimum":"0 A","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"121 kA","at 500 V":"75.6 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","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","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":"0","Switching Capacity Class Of The Circuit Breaker":"M","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=569004&mlfb=3VA1340-5EF42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1340-5EF42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1340-5EF42-0AA0 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time."},{"question":"What is 3VA1340-5EF42-0AA0's interrupting capacity at 240 V?","answer":"It interrupts 187 kA at 240 V, dropping to 121 kA at 415 V and 11.9 kA at 690 V — high enough for most utility-fed main breakers."},{"question":"What compliance documentation does this brand provide for 3VA1340-5EF42-0AA0?","answer":"As a Siemens SENTRON MCCB, it carries the usual CE marking for the European market and is designed to meet IEC 60947-2. RoHS and REACH declarations are standard from Siemens for this series."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1340-5EF42-0AA0","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/3VA1340-5EF42-0AA0 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}}