{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1340-4EF32-0KA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1340-4EF32-0KA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1340-4EF32-0KA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1340-4EF32-0KA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1340-4EF32-0KA0, molded case circuit breaker, 3-pole, 400 A rated continuous current, 121 kA breaking capacity at 240 V, line protection version.","salesMarkdown":"## 400 A MCCB with 121 kA interrupting capacity The Siemens 3VA1340-4EF32-0KA0 is a SENTRON molded case circuit breaker rated for 400 A continuous current across three poles, with a maximum breaking capacity of 121 kA at 240 V. That interrupting rating drops to 76 kA at 415 V and 440 V, then to 53 kA at 500 V, and 10.5 kA at 690 V — enough headroom for most industrial distribution panels where the available fault current is known and the SCCR needs to be coordinated upstream. The 15000-cycle latching endurance matches the duty cycle of a main feeder breaker that sees infrequent switching; it is not rated for daily motor-start duty. The 400 A rating holds flat from 40 °C to 50 °C ambient. Above that it derates: 392 A at 55 °C, 384 A at 60 °C, 376 A at 65 °C, 367 A at 70 °C. If the enclosure runs hot — say a non-ventilated panel near a furnace line — that 367 A at 70 °C figure is the one to size against, not the nameplate 400 A. Dimensions are 248 mm high, 138 mm wide, 110 mm deep. The 138 mm width is a standard 3-pole MCCB footprint for 400 A frame sizes — it fits Siemens 3VA switchboard mounting bases and most DIN-rail adapters without panel modifications. Rated insulation voltage is 800 V, so it handles 480/277 V and 600 V systems with margin. Maximum power loss is 92.1 W at rated current — a consideration for thermal management inside a sealed enclosure. Operating temperature range is -40 °C to 70 °C; storage range is -40 °C to 80 °C.","metaTitle":"Siemens 3VA1340-4EF32-0KA0 SENTRON MCCB, 400 A, 3-Pole, 121","metaDescription":"Siemens 3VA1340-4EF32-0KA0 SENTRON molded case circuit breaker, 400 A continuous, 3-pole, 121 kA at 240 V. Current production lifecycle. 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":"138 mm","title":"3VA1340-4EF32-0KA0","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]":"5.4 in","Height [in]":"9.8 in","description":"circuit breaker 3VA1 IEC frame 400 breaking capacity class S Icu=36kA @ 415V 3-pole, line protection TM240, ATAM, In=400A overload protection Ir=280A...400A short-circuit protection Ii=5...10 x In nut keeper kit circuit breaker 3VA1 IEC frame 400 breaking capacity class S Icu=36kA @ 415V 3-pole, line protection TM240, ATAM, In=400A overload protection Ir=280A...400A short-circuit protection Ii=5...10 x In nut SHUNT TRIP LEFT 208-277 V AC 50/60 HZ 220-250 V DC ACCESSORY","Trip indicator":"No","Number of poles":"3","Product version":"Line protection","Voltage trigger":"Yes","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"15 000","Undervoltage Release":"No","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Power loss [W] / maximum":"92.1 W","Auxiliary contact version":"Without","During Operation / Maximum":"70 °C","During Operation / Minimum":"-40 °C","Other Measurement Function":"No","Rated continuous current Iu":"400 A","Rated insulation voltage Ui":"800 V","Design of the auxiliary release":"Shunt trip (STL)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9688-0BL33","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","Reference code / acc. to DIN EN 81346-2":"Q","Max. rated operational voltage Ue with DC":"500 V","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"400 A","Adjustable response value current / li max.":"4 000 A","Adjustable response value current / li min.":"2 000 A","Adjustable response value current / lr min.":"280 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"0","Protective function of the overcurrent release":"LI","Switching capacity class of the circuit breaker":"S","Max. rated operational current of the frame size":"400 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"lug terminal","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=1396413&mlfb=3VA1340-4EF32-0KA0"},"ai":{"faq":[{"question":"Where can I buy 3VA1340-4EF32-0KA0 and get a price?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm offer."},{"question":"What are the key ratings for 3VA1340-4EF32-0KA0?","answer":"Rated continuous current 400 A, 3-pole, breaking capacity 121 kA at 240 V / 76 kA at 415 V / 10.5 kA at 690 V, rated insulation voltage 800 V, max power loss 92.1 W."},{"question":"Will 3VA1340-4EF32-0KA0 drop into a panel specified for 3VA1110-5EE32-0JA0?","answer":"The 3VA1340 is a 400 A frame; the 3VA1110 is a lower-current variant. Both share the SENTRON 3VA platform footprint — same 138 mm width per pole and 248 mm height — so the physical cutout and mounting base are identical. The difference is the continuous rating and the interrupting capacity at each voltage level."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1340-4EF32-0KA0","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/3VA1340-4EF32-0KA0 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}}