{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-6JQ32-0BH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-6JQ32-0BH0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-6JQ32-0BH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-6JQ32-0BH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2340-6JQ32-0BH0, molded case circuit breaker, 3-pole, 400 A rated current, 242 kA breaking capacity at 240 V, line protection design, active production.","salesMarkdown":"The Siemens 3VA2340-6JQ32-0BH0 is a SENTRON molded case circuit breaker rated for 400 A continuous at 40–50 °C, with a 3-pole design and an adjustable trip unit spanning 80 A to 400 A full-scale. This is a line-protection device, meaning it's designed to guard cables and busbars against overloads and short circuits, not motor protection — so don't spec it for direct motor starting duty. ## Temperature derating curve — the real-world current rating 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. If your panel enclosure runs hot — say, a packed MCC lineup near a furnace line — factor in that 300 A ceiling at 70 °C before you size the breaker. That's not trivial in a sealed enclosure; make sure your ventilation or cooling plan accounts for it, especially if you're stacking multiple breakers in the same section. ## Breaking capacity — where it clears faults cleanly Breaking capacity drops sharply above 500 V: 121 kA at 500 V, then only 7.5 kA at 690 V. On a 690 V system this breaker won't handle high-fault scenarios — it's really a 240–500 V device for serious fault duty. Below that range it's overkill for most sub-feeders; it belongs at the main or a heavy bus riser. Verify the gland plate knockout pattern against your existing panel cutout before ordering; the 138 mm width typically fits a 4-module-wide slot in a Siemens 8MF enclosure, but third-party panels may differ.","metaTitle":"Siemens 3VA2340-6JQ32-0BH0 SENTRON MCCB, 400 A, 3-Pole","metaDescription":"Siemens 3VA2340-6JQ32-0BH0 SENTRON molded case circuit breaker, 400 A rated at 40-50°C, 242 kA at 240 V, 3-pole, active production. Sourced 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":"138 mm","Height":"248 mm","Maximum":"4 000 A","Minimum":"600 A","at 240 V":"242 kA","at 415 V":"187 kA","at 440 V":"187 kA","at 500 V":"121 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]":"5.43 in","Height [In]":"9.76 in","Initial Value":"80 A","Trip Indicator":"Yes","Number Of Poles":"3","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":"3VA2340-6JQ32-0AA0","Design Of The Auxiliary Switch":"2 auxiliary switches + 1 trip alarm switch HQ","Design Of The Auxiliary Release":"undervoltage release (UVR)","Ground-Fault Monitoring Version":"Summation current formation L-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 160%","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":"3","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","Switching Capacity Class Of The Circuit Breaker":"H","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=140738&mlfb=3VA2340-6JQ32-0BH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-6JQ32-0BH0/alternatives.json"},"ai":{"faq":[{"question":"What are the key ratings for 3VA2340-6JQ32-0BH0?","answer":"Rated 400 A continuous at 40–50 °C ambient, 3-pole, with a breaking capacity of 242 kA at 240 V, 187 kA at 415 V, and 121 kA at 500 V. The adjustable trip unit ranges from 80 A to 400 A."},{"question":"Where can I buy 3VA2340-6JQ32-0BH0?","answer":"This part is available to order through our independent distribution channel. Submit an RFQ for current pricing and availability — lead time and stock position are confirmed at quote time."},{"question":"What is the depth of 3VA2340-6JQ32-0BH0?","answer":"The depth is 110 mm (4.33 inches)."},{"question":"What compliance documentation is available for this breaker?","answer":"As a SENTRON molded case circuit breaker from Siemens, this part is designed to meet IEC 60947-2 and UL 489 standards. Specific RoHS, REACH, and UL documentation is provided with the shipment or available on request."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-6JQ32-0BH0","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/3VA2340-6JQ32-0BH0 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}}