{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5JQ42-0BC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5JQ42-0BC0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5JQ42-0BC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ42-0BC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2340-5JQ42-0BC0, molded case circuit breaker, 4-pole, line protection, 400 A rated, 187 kA breaking capacity at 240 V, with undervoltage release and communication function.","salesMarkdown":"A communication function is also built in, so it can report status or accept remote trip commands over a bus, though the protocol is not specified in this listing. Above that, it derates linearly: 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C. ## Breaking capacity across voltage bands The 3VA2340-5JQ42-0BC0 delivers 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V. Dimensions are 248 mm high, 184 mm wide, and 110 mm deep. The 184 mm width is the 4-pole frame — a 3-pole version of the same frame would be narrower, so a panel cutout or mounting plate designed for a 3-pole 3VA2 will not accept this unit without modification.","metaTitle":"Siemens 3VA2340-5JQ42-0BC0 SENTRON MCCB, 400 A, 4-Pole, 187","metaDescription":"Siemens 3VA2340-5JQ42-0BC0 SENTRON molded case circuit breaker, 400 A rated, 4-pole, 187 kA breaking at 240 V. Current lifecycle. Quoted to order. Submit RFQ for availability and p","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":"No","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Full-Scale Value":"400 A","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"Yes","Design Of The Product":"Line protection","Communication Function":"Yes","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"98.5 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 HQ","Design Of The Auxiliary Release":"undervoltage release (UVR)","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":"3VA9608-0BB11","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":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","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=340688&mlfb=3VA2340-5JQ42-0BC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ42-0BC0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA2340-5JQ42-0BC0 and get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quotation; availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of 3VA2340-5JQ42-0BC0 at 415 V?","answer":"The interrupting rating is 121 kA at 415 V, which covers most industrial secondary-side fault levels without requiring a current-limiting upstream device."},{"question":"Does 3VA2340-5JQ42-0BC0 include an undervoltage release?","answer":"Yes, it is equipped with an undervoltage release (UVR) as standard, which opens the breaker when control voltage drops below the dropout threshold — a typical safety requirement for motor circuits and emergency-stop chains."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-5JQ42-0BC0","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/3VA2340-5JQ42-0BC0 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}}