{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5JQ42-0JA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5JQ42-0JA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5JQ42-0JA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ42-0JA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2 molded case circuit breaker, 4-pole, 400 A frame with 80 A thermal-magnetic trip, 187 kA interrupting at 240 V AC, line-protection design, shunt trip release, communication capable.","salesMarkdown":"## 400 A frame, 80 A trip — what the interrupting ratings mean for a feeder circuit The interrupting ratings tell you where this breaker can sit: 187 kA at 240 V AC, 121 kA at 415 V, 121 kA at 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V. Thermal derating is published across the full operating range: full 400 A continuous at 40–50 °C, then 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C. ## Mounting dimensions and panel fit The breaker measures 248 mm high, 184 mm wide, and 110 mm deep. The 184 mm width for a 4-pole unit is typical for the 3VA2 frame; verify the bus-bar spacing in your existing switchboard before committing the cutout. ## Built-in communication and shunt trip This variant includes a communication function and a shunt trip release — meaning it can be remotely tripped via a control signal and integrated into a monitoring network. The shunt trip is useful for emergency-stop or undervoltage protection schemes where a PLC or safety relay needs to kill the breaker. The basic switch variant is order code 3VA2340-5JQ42-0AA0 if you need the same breaker without the shunt trip. Maximum power loss is 96 W at rated current — a factor for enclosure thermal calculations.","metaTitle":"Siemens 3VA2340-5JQ42-0JA0 SENTRON MCCB, 400 A Frame, 187 kA","metaDescription":"Siemens 3VA2340-5JQ42-0JA0 SENTRON molded case circuit breaker, 400 A frame, 80 A trip, 4-pole, 187 kA interrupting at 240 V. Current lifecycle stage. 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":"No","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":"Without","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":"3VA9688-0BL32","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":"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=435522&mlfb=3VA2340-5JQ42-0JA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ42-0JA0/alternatives.json"},"ai":{"faq":[{"question":"What are the interrupting ratings for 3VA2340-5JQ42-0JA0?","answer":"187 kA at 240 V AC, 121 kA at 415 V, 121 kA at 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V."},{"question":"What is the thermal derating for this breaker above 40 °C?","answer":"Full 400 A continuous up to 50 °C, then 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C."},{"question":"Where can I buy 3VA2340-5JQ42-0JA0?","answer":"This part is sourced and quoted to order through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time, not listed here."},{"question":"Will 3VA2340-5JQ42-0JA0 drop into a panel specified around 5SQ2670-2YA63?","answer":"The 3VA2 frame (248×184×110 mm) is a different mechanical footprint than the 5SQ series. Do not assume a direct drop-in without verifying bus-bar spacing, mounting hole pattern, and lug orientation against your existing panel layout."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-5JQ42-0JA0","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/3VA2340-5JQ42-0JA0 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}}