{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5JQ42-0KC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5JQ42-0KC0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5JQ42-0KC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ42-0KC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2340-5JQ42-0KC0, molded case circuit breaker, 4-pole, 400 A rated continuous current, breaking capacity 187 kA at 240 V, line protection version with ETU560 electronic trip unit.","salesMarkdown":"## SENTRON 3VA2340-5JQ42-0KC0 — 400 A MCCB with ETU560, 4-Pole, Active Production The Siemens SENTRON 3VA2340-5JQ42-0KC0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 400 A at 40 °C with an insulation voltage Ui of 800 V. Communication functionality is built in, enabling integration with higher-level control systems. Breaking capacity varies sharply with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V. These figures cover most low-voltage distribution panels; the 17 kA at 690 V still handles typical industrial fault levels on 690 V networks. For selectivity coordination, the high interrupting ratings at 240–440 V allow this breaker to serve as a main or feeder device upstream of lower-rated branch breakers. Rated 400 A from 40 °C through 50 °C ambient; above that, the continuous current derates linearly to 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C. Power loss at full rated current is 96 W maximum — account for this in enclosure thermal calculations, especially in sealed or high-ambient cabinets.","metaTitle":"Siemens 3VA2340-5JQ42-0KC0 SENTRON MCCB, 400A, 4P, 187kA","metaDescription":"Siemens SENTRON 3VA2340-5JQ42-0KC0 molded case circuit breaker, 400A rated, 4-pole, breaking capacity 187kA at 240V. Active production, sourced to order. RFQ for current pricing.","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","Height":"248 mm","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"121 kA","at 500 V":"75.6 kA","at 690 V":"17 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","Trip indicator":"No","Number of poles":"4","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":"Yes","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Power loss [W] / maximum":"96 W","Auxiliary contact version":"2 auxiliary switches HQ","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"400 A","Rated insulation voltage Ui":"800 V","Of The Supplied Basic Switch":"3VA2340-5JQ42-0AA0","Design of the auxiliary release":"Shunt trip (STL)","Ground fault monitoring version":"Summation current formation L + N conductor","Of The Integrated Auxiliary Trip":"3VA9688-0BL33","Design of the overcurrent release":"ETU560","Protection class IP / on the front":"IP40","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"17","Adjustable response value time / tr min.":"0.5","Adjustable response value time / tsd max.":"0.5 s","Adjustable response value time / tsd min.":"0.05 s","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"400 A","Adjustable response value current / lg max.":"400 A","Adjustable response value current / lg min.":"80 A","Adjustable response value current / li max.":"4 000 A","Adjustable response value current / li min.":"600 A","Adjustable response value current / lr min.":"160 A","Adjustable response value current / Isd max.":"4 000 A","Adjustable response value current / Isd min.":"240 A","Ground fault protection can be switched ON/OFF":"Yes","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"2","Protective function of the overcurrent release":"LSIG","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","Switching capacity class of the circuit breaker":"M","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","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"35 x 10","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"20 x 1"}},"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=225747&mlfb=3VA2340-5JQ42-0KC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ42-0KC0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this MCCB at 415 V?","answer":"121 kA at 415 V, which matches the rating at 440 V. At 500 V it drops to 75.6 kA, and at 690 V to 17 kA."},{"question":"What trip unit does this breaker use?","answer":"It uses the ETU560 electronic trip unit, which provides adjustable overcurrent protection with communication capability."},{"question":"Where can I buy 3VA2340-5JQ42-0KC0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Contact us for current availability and pricing."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-5JQ42-0KC0","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/3VA2340-5JQ42-0KC0 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}}