{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1340-6GF42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1340-6GF42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1340-6GF42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1340-6GF42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1340-6GF42-0AA0, molded case circuit breaker, 400 A, 4-pole, TM240 thermal-magnetic release, line protection design.","salesMarkdown":"Above 55 °C the thermal curve begins to pull back: 392 A at 55 °C, 384 A at 60 °C, 376 A at 65 °C, and 367 A at 70 °C. That matters if your enclosure runs hot — you lose roughly 2 % per 5 °C above 50 °C, so a panel at 65 °C derates the breaker to 376 A, and the downstream load must be sized accordingly. The interrupting ratings are the headline: 220 kA at 240 V, 154 kA at 415 V and 440 V, 121 kA at 500 V, and 17 kA at 690 V. ## TM240 overcurrent release and line protection design The overcurrent release is designated TM240 — a thermal-magnetic type tuned for line protection (cable, busbar, distribution). It is not a motor-protection breaker (no adjustable magnetic pickup for inrush), so it belongs in a distribution board or feeder circuit, not directly upstream of a motor starter. Maximum power loss is 92.1 W at rated current — that heat must be vented in a sealed enclosure. Dimensions: 248 mm height, 184 mm width, 110 mm depth. The 4-pole body is 184 mm wide — that is the standard 4-pole MCCB footprint for a 400 A frame, so it fits existing cutouts and busbar spacing designed for that class. Depth at 110 mm is shallow enough for most 300 mm deep enclosures with wiring space behind. If your circuit requires UVR or GF protection, you need a different suffix in the 3VA1 series. The TM240 release is fixed — no interchangeable trip units on this order code.","metaTitle":"Siemens 3VA1340-6GF42-0AA0 SENTRON MCCB, 400 A, 4-Pole, TM24","metaDescription":"Siemens 3VA1340-6GF42-0AA0 SENTRON molded case circuit breaker, 400 A rated, 4-pole, TM240 release, 220 kA at 240 V. Active production. Sourced to order against RFQ.","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":"400 A","Minimum":"400 A","at 240 V":"220 kA","at 415 V":"154 kA","at 440 V":"154 kA","at 500 V":"121 kA","at 690 V":"17 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":"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","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":"H","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=569010&mlfb=3VA1340-6GF42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1340-6GF42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA1340-6GF42-0AA0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for the latest supply picture."},{"question":"What is the interrupting rating of 3VA1340-6GF42-0AA0 at 240 V?","answer":"220 kA at 240 V. That is a high interrupting capacity for a 400 A frame — it handles severe fault currents at the transformer secondary without requiring an upstream current-limiting device."},{"question":"What is the thermal derating above 50 °C for this MCCB?","answer":"The breaker is rated 400 A from 40 °C through 50 °C. Above that: 392 A at 55 °C, 384 A at 60 °C, 376 A at 65 °C, and 367 A at 70 °C. Each 5 °C rise above 50 °C costs roughly 2 % of the continuous rating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1340-6GF42-0AA0","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/3VA1340-6GF42-0AA0 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}}