{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5JQ32-0AD0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5JQ32-0AD0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5JQ32-0AD0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ32-0AD0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON series, molded case circuit breaker, order code 3VA2340-5JQ32-0AD0, 400 A, 3-pole, 187 kA at 240 V breaking capacity.","salesMarkdown":"## What this MCCB is and what the ratings mean for your panel The Siemens SENTRON 3VA2340-5JQ32-0AD0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, meaning it sits at the feeder or main distribution point in a panel to protect cables and busbars from overload and short-circuit faults. Its full-scale current rating is 400 A, and it carries an adjustable thermal-magnetic trip unit with an initial setting value of 80 A, so you set the actual pickup to match your downstream load. Breaking capacity is the headline number that decides whether this breaker clears a fault without welding its contacts or rupturing the case. At 240 V it interrupts 187 kA; at 415 V and 440 V that drops to 121 kA; at 500 V it's 75.6 kA; and at 690 V it's 7.5 kA. Those are the maximum prospective fault currents it can safely break at each voltage level — spec the available fault current at your service entrance against these numbers, not the 400 A load rating. Thermal derating matters when the breaker lives in a warm enclosure. It carries the full 400 A continuously at ambient temperatures up to 50 °C. At 55 °C you must derate to 375 A; at 60 °C to 350 A; at 65 °C to 325 A; at 70 °C to 300 A. If your panel ambient runs above 50 °C, size the breaker one frame step higher or plan for the derated current. Maximum power loss at rated current is 96 W. That's heat that stays inside the enclosure — factor it into your thermal budget alongside other components, especially in a sealed, non-ventilated panel. ## Panel integration and footprint The breaker measures 248 mm high, 138 mm wide, and 110 mm deep. That 110 mm depth (4.33 in) is the dimension that determines gland-plate clearance and whether it fits a shallow backpanel enclosure. ## Lifecycle and sourcing posture It ships with three auxiliary switches (HQ configuration) factory-installed — no need to add a separate aux switch block for status feedback to a PLC. The basic switch variant 3VA2340-5JQ32-0AA0 is the same breaker without those aux switches, if your BOM calls for the base version. ## Operating environment limits Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C. The storage limit governs handling during transport and warehouse hold — the breaker can sit in a cold truck or hot warehouse within that range without damage. The operating limit is what the breaker sees while carrying current.","metaTitle":"Siemens SENTRON 3VA2340-5JQ32-0AD0 MCCB, 400 A, 3-Pole","metaDescription":"Siemens SENTRON 3VA2340-5JQ32-0AD0 molded case circuit breaker, 400 A, 3-pole, line protection. Breaking capacity 187 kA at 240 V. Active production, sourced to order. Request RFQ.","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":"3 auxiliary switches HQ","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":"3","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=89347&mlfb=3VA2340-5JQ32-0AD0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ32-0AD0/alternatives.json"},"ai":{"faq":[{"question":"What is 3VA2340-5JQ32-0AD0's listed depth?","answer":"The depth is 110 mm (4.33 in). That's the dimension from the mounting surface to the front of the breaker — critical for shallow enclosure clearance."},{"question":"What is 3VA2340-5JQ32-0AD0's listed width?","answer":"The width is 138 mm (5.43 in). That's the per-unit width for side-by-side mounting on a DIN rail or mounting plate."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-5JQ32-0AD0","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/3VA2340-5JQ32-0AD0 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}}