{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-4HM32-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-4HM32-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-4HM32-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-4HM32-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2340-4HM32-0AA0, molded case circuit breaker, 3-pole, 400 A continuous, line protection design, 110 x 138 x 248 mm.","salesMarkdown":"Its interrupting capacity scales from 121 kA at 240 V down to 7.5 kA at 690 V — the voltage-dependent SCCR curve is the real coordination spec for the fault-current study, not a single number. Continuous current holds at 400 A from 40 °C through 50 °C, then derates linearly to 340 A at 70 °C. That flat thermal curve means no headroom loss in a warm panel until you cross 55 °C — common in enclosed switchgear near process heat. The 400 A full-scale value is the BOM line item; the 80 A initial setting (likely the adjustable thermal pickup floor) gives range for motor or feeder circuits that don't need the full frame. Interrupting capacity: 121 kA at 240 V, 75.6 kA at 415/440 V, 52.5 kA at 500 V, 7.5 kA at 690 V. The ground-fault monitoring uses summation current formation on the L-conductor, not a separate GFCI module; that's built into the trip unit for this variant. ## Panel integration and physical fit Dimensions: 110 mm deep, 138 mm wide, 248 mm tall. The 138 mm width on a 3-pole frame fits a typical DIN-rail enclosure section with room for side-mounted auxiliaries.","metaTitle":"Siemens 3VA2340-4HM32-0AA0 SENTRON MCCB, 400 A, 3-Pole","metaDescription":"Siemens SENTRON 3VA2340-4HM32-0AA0 molded case circuit breaker, 400 A continuous, 3-pole, 121 kA at 240 V. Active production. Quoted to order against 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":"121 kA","at 415 V":"75.6 kA","at 440 V":"75.6 kA","at 500 V":"52.5 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":"385 A","at 60 °C":"370 A","at 65 °C":"355 A","at 70 °C":"340 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":"No","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","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":"ETU330","protection class IP / on the front":"IP40","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":"LIG","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"S","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=906680&mlfb=3VA2340-4HM32-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-4HM32-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Does this breaker include ground-fault protection?","answer":"Yes, the ground-fault monitoring uses summation current formation on the L-conductor, integrated into the trip unit. It is not a separate add-on module."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-4HM32-0AA0","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/3VA2340-4HM32-0AA0 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}}