{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5JQ42-0AG0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5JQ42-0AG0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5JQ42-0AG0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ42-0AG0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA series, molded case circuit breaker (MCCB), 3VA2340-5JQ42-0AG0, 4-pole, 400 A at 40 °C, ETU560 electronic trip unit, 187 kA at 240 V.","salesMarkdown":"That 400 A rating holds through 50 °C — only above 55 °C does it derate, stepping down to 375 A at 55 °C and 300 A at 70 °C, so panel builders can size this breaker into a warm enclosure without losing headroom. Breaking capacity is 187 kA at 240 V, 121 kA at 415 V and 440 V, and 75.6 kA at 500 V — figures that cover high-fault utility feeds and large motor control centers. The 4-pole design with ground-fault monitoring via summation current formation on L+N conductors means this unit can serve as the main disconnect for a solidly-grounded wye system where ground-fault protection is required. The 3VA2340-5JQ42-0AG0 occupies 184 mm width, 248 mm height, and 110 mm depth on the panel. The 184 mm width for a 4-pole frame is standard for this class; verify the backplate cutout matches the Siemens 3VA mounting pattern if replacing an older 3WL or 3VF frame.","metaTitle":"Siemens 3VA2340-5JQ42-0AG0 SENTRON MCCB, 400 A, 4-Pole, ETU5","metaDescription":"Siemens SENTRON 3VA2340-5JQ42-0AG0 molded case circuit breaker, 400 A rated at 40 °C, 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","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","Trip Indicator":"Yes","Number Of Poles":"4","Product version":"Line protection","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Communication Function":"Yes","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"96 W","Auxiliary contact version":"1 auxiliary switch + 1 trip alarm switch HP","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","rated insulation voltage Ui":"800 V","Of The Supplied Basic Switch":"3VA2340-5JQ42-0AA0","Courant permanent assigné Iu":"400 A","Design Of The Auxiliary Release":"Without auxiliary release","Ground-Fault Monitoring Version":"Summation current formation L + N conductor","Design Of The Overcurrent Release":"ETU560","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 20% to 100%","operating voltage / at AC / rated value":"690 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","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","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LSIG","number of CO contacts / for auxiliary contacts":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB11","Switching Capacity Class Of The Circuit Breaker":"M","Max. rated operational current of the frame size":"400 A","Mechanical Service Life (Switching 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","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"35 x 10 mm","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"20 x 1 mm"}},"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=344716&mlfb=3VA2340-5JQ42-0AG0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ42-0AG0/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-5JQ42-0AG0","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/3VA2340-5JQ42-0AG0 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}}