{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-4JQ32-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-4JQ32-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-4JQ32-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-4JQ32-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2340-4JQ32-0AA0, molded case circuit breaker, line protection, 3-pole, 400 A continuous, 121 kA at 240 V, 75.6 kA at 415 V, 110 mm depth, 138 mm width, 248 mm height.","salesMarkdown":"The interrupting ratings tell you where it can sit without cascading upstream: 121 kA at 240 V, 75.6 kA at 415 V and 440 V, 52.5 kA at 500 V, and 7.5 kA at 690 V. That 121 kA figure at 240 V covers high-fault service-entrance applications; the 75.6 kA at 415 V handles most European industrial mains. The breaker communicates (communication function yes), so it can report status or trip events to a BMS or PLC — useful for remote monitoring without a separate aux contact block. ## Thermal derating — the real-world continuous current Above that, the breaker derates linearly: 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C. If your panel ambient sits at 55 °C, you lose 25 A of headroom — plan the load accordingly. The maximum power loss is 96 W, which adds to the enclosure's thermal budget. Dimensions are 110 mm depth, 138 mm width, 248 mm height — a standard MCCB footprint for 400 A frames. The 138 mm width fits a three-pole breaker in a typical distribution section; the 248 mm height clears most deadfronts. Rated insulation voltage is 800 V, and the breaker operates between -25 °C and 70 °C, storing from -40 °C to 80 °C.","metaTitle":"Siemens 3VA2340-4JQ32-0AA0 SENTRON MCCB, 400 A, 3-Pole, 121","metaDescription":"Siemens SENTRON 3VA2340-4JQ32-0AA0 molded case circuit breaker, 400 A continuous, 3-pole, 121 kA interrupting at 240 V. Active production. Quoted to order.","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","Height":"248 mm","Maximum":"4 000 A","Minimum":"600 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":"7.5 kA","at 40 °C":"400 A","at 45 °C":"400 A","at 50 °C":"400 A","at 55 °C":"375 A","at 60 °C":"350 A","at 65 °C":"325 A","at 70 °C":"300 A","Depth [In]":"4.33 in","Width [In]":"5.43 in","Height [In]":"9.76 in","Initial Value":"80 A","Trip Indicator":"No","Number Of Poles":"3","Voltage Trigger":"No","lifecycle_stage":"current","Full-Scale Value":"400 A","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Line protection","Communication Function":"Yes","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"96 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Ground-Fault Monitoring Version":"Summation current formation L-conductor","Continuous Current / Rated Value":"400 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU560","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 20% to 160%","Product Function / Grounding Protection":"Yes","operating voltage / at AC / rated value":"690 V","reference code / according to IEC 81346-2":"Q","Continuous Current / Rated Value / Maximum":"400 A","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LSIG","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":"on both sides nut keeper kit","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/c1b3b6c5f6d67465025ac41848ceb75e.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=906682&mlfb=3VA2340-4JQ32-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-4JQ32-0AA0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA2340-4JQ32-0AA0?","answer":"Submit an RFQ through this listing. The part is sourced to order through independent distribution; pricing and stock levels are confirmed at quote time."},{"question":"What is the closest functional second-source for 3VA2340-4JQ32-0AA0?","answer":"The 3VA2225-5JQ32-0AK0 is a lower-current sibling in the same SENTRON 3VA platform, but the 3VA2340-4JQ32-0AA0 carries a 400 A frame versus the 3VA2225's 250 A class. Panel cutout and bus-bar spacing differ; verify the mounting footprint before swapping."},{"question":"Will 3VA2340-4JQ32-0AA0 drop into a panel specified around 3VA2225-5JQ32-0AK0 without rewiring?","answer":"Not without checking the bus-bar centres and lug sizes. Both are 3-pole SENTRON MCCBs, but the 400 A frame is physically larger (138 mm wide vs the 3VA2225's narrower footprint). The terminal pads may also differ for the higher current rating."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-4JQ32-0AA0","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/3VA2340-4JQ32-0AA0 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}}