{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1340-4EF42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1340-4EF42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1340-4EF42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1340-4EF42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1340-4EF42-0AA0, 4-pole molded case circuit breaker, 400 A at 40 °C, TM240 thermal-magnetic release, 121 kA interrupting at 240 V, IP40 front.","salesMarkdown":"## 400 A continuous, 121 kA interrupting — the MCCB for high-fault panels The Siemens SENTRON 3VA1340-4EF42-0AA0 is a 4-pole molded case circuit breaker rated for 400 A continuous at 40 °C ambient, with a TM240 thermal-magnetic overcurrent release. Its interrupting capacity hits 121 kA at 240 V and still holds 75.6 kA at 415 V — enough to clear a major fault without cascading upstream. This is the breaker you spec when the transformer secondary or main feeder needs a clean trip curve and the panel SCCR demands real headroom. The 400 A rating holds flat from 40 °C to 50 °C, then derates to 376 A at 65 °C and 367 A at 70 °C. The TM240 release is thermal-magnetic: thermal for overload protection with an inverse-time curve, magnetic for instantaneous short-circuit trip. No electronic adjustments, no communication module — it's a straight line-protection device for fixed-distribution applications. The 3VA1340-4EF42-0AA0 measures 184 mm wide by 248 mm tall by 110 mm deep — a 4-pole frame that bolts into a standard switchboard or panel-mount cutout. Compared to the smaller-frame 3VA1112-5EE32-0AA0 (a 3-pole, lower-current MCCB), the 3VA1340-4EF42-0AA0 is a physically larger 4-pole frame with a 400 A continuous rating versus the 3VA1112's lower amperage. The 3VA1112 series typically tops out around 125 A and is narrower at 105 mm wide. The 3VA1340's 184 mm width and 4-pole design mean it does not drop into a panel cutout sized for the 3VA1112 without reworking the mounting plate and bus connections. The TM240 release on this part is a thermal-magnetic design, while the 3VA1112 may carry a different release curve — verify coordination if substituting in a selective system.","metaTitle":"Siemens 3VA1340-4EF42-0AA0 SENTRON MCCB, 400 A, 4-Pole, 121","metaDescription":"Siemens 3VA1340-4EF42-0AA0 SENTRON molded case circuit breaker, 400 A rated at 40 °C, 4-pole, 121 kA interrupting at 240 V. TM240 release, IP40 front. Quoted to order against an RF","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":"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","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":"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=569000&mlfb=3VA1340-4EF42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1340-4EF42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting rating of the 3VA1340-4EF42-0AA0 at 240 V?","answer":"It is rated for 121 kA at 240 V, dropping to 75.6 kA at 415 V and 440 V, 52.5 kA at 500 V, and 11.9 kA at 690 V."},{"question":"How do I get pricing and availability for the 3VA1340-4EF42-0AA0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ with your target quantity and delivery window; availability and current pricing are confirmed at quote time."},{"question":"What is the depth of the 3VA1340-4EF42-0AA0?","answer":"The depth is 110 mm (4.33 in), with a width of 184 mm (7.24 in) and a height of 248 mm (9.76 in)."},{"question":"Will the 3VA1340-4EF42-0AA0 drop into a panel cutout for a 3VA1112-5EE32-0AA0?","answer":"No — the 3VA1340 is a 4-pole frame at 184 mm wide, while the 3VA1112 series is typically 3-pole and narrower at 105 mm wide. The mounting plate and bus connections would need rework for the larger frame."},{"question":"What compliance documentation is available for the 3VA1340-4EF42-0AA0?","answer":"The SENTRON series carries standard certifications including IEC/EN 60947-2 for molded case circuit breakers. Specific documentation such as RoHS, REACH, UL, and IEC declarations are available from Siemens on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1340-4EF42-0AA0","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/3VA1340-4EF42-0AA0 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}}