{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5JQ32-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5JQ32-0AB0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5JQ32-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ32-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2 molded case circuit breaker, 3VA2340-5JQ32-0AB0, 3-pole, 400 A rated, line protection, with communication function.","salesMarkdown":"It carries a full-scale rating of 400 A and a minimum adjustable trip setting of 80 A, with a 3-pole configuration that covers three-phase feeders. Rated for line protection, this MCCB is the primary overcurrent device on a feeder — not a motor-protective breaker with integrated overload class. It sits upstream of branch circuits and downstream of the main transformer or service entrance. The interrupting capacity tells you where it can be installed: 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. At 400 V class (common in industrial panels), the 121 kA rating gives substantial SCCR headroom for high-fault installations. ## Thermal derating and continuous current The 400 A rating holds up to 50 °C ambient. Above that, the breaker must be derated: 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C. If your panel internal ambient runs hot — near a transformer or in a non-ventilated enclosure — the 55 °C derating to 375 A is the figure to spec against, not the 400 A nameplate. The breaker includes a communication function and comes with 2 auxiliary switches (HP type) pre-installed. No undervoltage release or voltage trip is fitted on this variant. The basic switch variant is 3VA2340-5JQ32-0AA0 if you need the base model without auxiliaries.","metaTitle":"Siemens 3VA2340-5JQ32-0AB0 SENTRON MCCB, 400 A, 3-Pole","metaDescription":"Siemens 3VA2340-5JQ32-0AB0 SENTRON molded case circuit breaker, 400 A rated, 3-pole, line protection, 187 kA at 240 V. 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":"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]":"5.43 in","Height [In]":"9.76 in","Initial Value":"80 A","Trip Indicator":"No","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":"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":"3VA2340-5JQ32-0AA0","Design Of The Auxiliary Switch":"2 auxiliary switches HP","Design Of The Auxiliary Release":"Without auxiliary release","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%","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":"3VA9988-0AA11","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=50941&mlfb=3VA2340-5JQ32-0AB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ32-0AB0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting capacity of this MCCB at 415 V?","answer":"121 kA at 415 V, which is the same rating as at 440 V. At 500 V it drops to 75.6 kA, and at 690 V to 7.5 kA."},{"question":"What are the physical dimensions of 3VA2340-5JQ32-0AB0?","answer":"248 mm high, 138 mm wide, 110 mm deep. The 138 mm width is the standard 3-pole MCCB footprint for this frame."},{"question":"Where can I buy 3VA2340-5JQ32-0AB0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-5JQ32-0AB0","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/3VA2340-5JQ32-0AB0 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}}