{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5JQ42-0KL0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5JQ42-0KL0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5JQ42-0KL0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ42-0KL0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2340-5JQ42-0KL0, molded case circuit breaker, 4-pole, 400 A rated, breaking capacity 187 kA at 240 V, 121 kA at 415 V, with communication function and shunt trip release.","salesMarkdown":"The Siemens SENTRON 3VA2340-5JQ42-0KL0 is a 4-pole molded case circuit breaker (MCCB) rated 400 A continuous at 40 °C, with a breaking capacity of 187 kA at 240 V AC and 121 kA at 415 V AC. That 187 kA figure at 240 V means it can safely interrupt a fault current up to 187,000 A without welding contacts or rupturing the case — critical for high-fault installations like transformer secondaries or large motor control centers. At 690 V the interrupting rating drops to 7.5 kA, so verify the available fault current at your service voltage before specifying. The breaker carries a full rated current of 400 A from 40 °C up to 50 °C, then derates linearly to 300 A at 70 °C. If your panel ambient runs above 50 °C, you need to account for that derating in the load schedule — a 375 A load at 55 °C is still within the curve. This MCCB includes a communication function and is fitted with a shunt trip release (STL) plus an auxiliary switch configuration: 2 auxiliary switches + 1 trip alarm switch + 1 electrical alarm switch HQ. The breaker measures 248 mm high by 184 mm wide by 110 mm deep — a standard SENTRON 3VA2 frame size. The 110 mm depth leaves room for cable bending radius in a 400 mm deep enclosure. Maximum power loss is 96 W at rated current, so factor that into the enclosure thermal calculation — a sealed cabinet may need forced ventilation or a larger volume to stay below the 70 °C operating maximum.","metaTitle":"Siemens 3VA2340-5JQ42-0KL0 SENTRON MCCB, 400 A, 4-Pole","metaDescription":"Siemens SENTRON 3VA2340-5JQ42-0KL0 molded case circuit breaker, 400 A rated, 4-pole, 187 kA 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":"184 mm","Height":"248 mm","Maximum":"4 000 A","Minimum":"600 A","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"121 kA","at 500 V":"75.6 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]":"7.24 in","Height [In]":"9.76 in","Initial Value":"80 A","Trip Indicator":"Yes","Number Of Poles":"4","Voltage Trigger":"Yes","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","Of The Supplied Basic Switch":"3VA2340-5JQ42-0AA0","Design Of The Auxiliary Switch":"2 auxiliary switches + 1 trip alarm switch + 1 electrical alarm switch HQ","Design Of The Auxiliary Release":"shunt trip (STL)","Ground-Fault Monitoring Version":"Summation current formation L + N 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 100%","Of The Integrated Auxiliary Trip Unit":"3VA9688-0BL33","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":"4","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB22","Switching Capacity Class Of The Circuit Breaker":"M","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=140756&mlfb=3VA2340-5JQ42-0KL0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ42-0KL0/alternatives.json"},"ai":{"faq":[{"question":"Will 3VA2340-5JQ42-0KL0 drop into a panel specified around 5SQ2670-2YA06?","answer":"The 3VA2340-5JQ42-0KL0 is a SENTRON MCCB with a 110 mm depth and 184 mm width; the 5SQ2670-2YA06 is a different product family. Without a dimensional drawing of the existing panel cutout, verify the mounting footprint and terminal positions before assuming a direct swap."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-5JQ42-0KL0","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/3VA2340-5JQ42-0KL0 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}}