{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1340-4EE42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1340-4EE42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1340-4EE42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1340-4EE42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1340-4EE42-0AA0, Molded case circuit breaker, 4-pole, 400 A, TM220 thermal-magnetic release, line protection, 121 kA at 240 V AC.","salesMarkdown":"## 400 A MCCB for main feeder or large motor protection The Siemens 3VA1340-4EE42-0AA0 is a SENTRON molded case circuit breaker rated for 400 A continuous current (Iu) at up to 50 °C ambient, with a 4-pole configuration and TM220 thermal-magnetic release. It carries a 121 kA interrupting rating at 240 V AC, which drops to 76 kA at 415 V and 440 V, then to 53 kA at 500 V, and 10.5 kA at 690 V — so the available fault current at your service voltage determines whether this breaker clears without upstream coordination. The TM220 release means the thermal element is fixed at 400 A; the magnetic pickup is adjustable, typically 5–10x In for the 3VA platform, letting you dial in motor start or transformer inrush without nuisance trips. ## Current derating and thermal budget Above that, it derates: 392 A at 55 °C, 384 A at 60 °C, 376 A at 65 °C, and 367 A at 70 °C. Maximum power loss is 92.1 W, which matters for enclosure heat rise calculations when grouping multiple breakers. ## Mounting dimensions and panel fit The breaker measures 184 mm wide by 248 mm high by 110 mm deep. That depth includes the handle and arc chamber — verify your enclosure depth clears 110 mm plus wiring bend radius on the line and load lugs. The 4-pole body is wider than a 3-pole; confirm your DIN-rail or bolt-on mounting plate has the 184 mm slot free. ## Voltage ratings and application range Maximum DC operational voltage is 600 V — usable in some battery or DC bus applications, but consult the 3VA DC manual for specific series/parallel pole wiring. The line protection designation means it's configured for cable and busbar protection out of the box; motor protection would typically use a different release curve or an electronic trip unit.","metaTitle":"Siemens 3VA1340-4EE42-0AA0 SENTRON MCCB, 400 A, 4-Pole, 121","metaDescription":"Siemens 3VA1340-4EE42-0AA0 SENTRON molded case circuit breaker, 400 A continuous, 4-pole, TM220 release. Rated 121 kA at 240 V AC. Sourced to order against RFQ. Current production","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","title":"3VA1340-4EE42-0AA0","Height":"248 mm","at 240 V":"121 kA","at 415 V":"76 kA","at 440 V":"76 kA","at 500 V":"53 kA","at 690 V":"10.5 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]":"4.3 in","Width [In]":"7.2 in","Height [In]":"9.8 in","description":"circuit breaker 3VA1 IEC frame 400 breaking capacity class S Icu=36kA @ 415V 4-pole, line protection TM220, ATFM, In=400A overload protection Ir=280A...400A short-circuit protection Ii=10 x In N conductor unprotected nut keeper kit","Number Of Poles":"4","Product version":"Line protection","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","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","Courant permanent assigné Iu":"400 A","Ground-Fault Monitoring Version":"Without","Tension assignée d'isolement Ui":"800 V","Design Of The Overcurrent Release":"TM220","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","reference code / acc. to IEC 81346-2":"Q","Max. rated operational voltage Ue with DC":"600 V","Product Extension / Optional / Motor Drive":"Yes","Adjustable response value current / li max.":"4 000 A","Adjustable response value current / li min.":"4 000 A","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"S","Max. rated operational current of the frame size":"400 A","Mechanical Service Life (Switching Cycles) / Typical":"15 000","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"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=690161&mlfb=3VA1340-4EE42-0AA0"},"ai":{"faq":[{"question":"Where can I buy 3VA1340-4EE42-0AA0 and how is it quoted?","answer":"This part is sourced to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for your target quantity."},{"question":"What is the interrupting rating of 3VA1340-4EE42-0AA0 at 415 V?","answer":"76 kA at 415 V AC, same as at 440 V. At 240 V it reaches 121 kA, and at 690 V it drops to 10.5 kA."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1340-4EE42-0AA0","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/3VA1340-4EE42-0AA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}