{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5HL42-0BL0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5HL42-0BL0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5HL42-0BL0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5HL42-0BL0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2340-5HL42-0BL0, molded case circuit breaker, 4-pole, 400 A rated continuous current, line protection design, breaking capacity 187 kA at 240 V.","salesMarkdown":"The 3VA2340-5HL42-0BL0 delivers 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. For a site electrical engineer planning a selective coordination study: the high interrupting rating at the common 415 V level means this breaker can sit upstream of downstream devices with lower SCCR, provided the let-through energy (I²t) is coordinated. Compared to a sibling like the 3VA2225-5HN42-0BB0 (a 250 A frame), this 400 A unit occupies a larger physical footprint — 184 mm wide × 248 mm high × 110 mm deep — so a panel originally kitted for the smaller frame will need busbar re-spacing and possibly a different mounting base. The trip unit adjustment range (600 A to 4 000 A) also differs; the 250 A sibling's range tops out lower, so the two are not drop-in interchangeable without rewiring and re-coordination. ## Thermal Derating and Installation Environment Above that, it derates: 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C. If your panel sits in a hot environment — near a furnace line, in a non-climate-controlled enclosure in the Gulf — you must apply the derating factor or risk nuisance tripping on thermal overload. The 110 mm depth and 184 mm width mean it fits standard Siemens SENTRON mounting bases and busbar systems. The line protection design (as opposed to motor protection) means the trip curve is optimized for cable and busbar thermal limits, not motor inrush — don't use it as a direct motor starter protector without checking the manufacturer's motor coordination tables.","metaTitle":"Siemens 3VA2340-5HL42-0BL0 SENTRON MCCB, 400 A, 4-Pole","metaDescription":"Siemens SENTRON 3VA2340-5HL42-0BL0 molded case circuit breaker, 400 A continuous, 4-pole, line protection. Breaking capacity 187 kA at 240 V. Active production, available 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":"385 A","at 60 °C":"370 A","at 65 °C":"355 A","at 70 °C":"340 A","Depth [In]":"4.33 in","Width [In]":"7.24 in","Height [In]":"9.76 in","Trip Indicator":"Yes","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"Yes","Design Of The Product":"Line protection","Communication Function":"No","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":"3VA2340-5HL42-0AA0","Design Of The Auxiliary Switch":"2 auxiliary switches + 1 trip alarm switch + 1 electrical alarm switch HQ","Design Of The Auxiliary Release":"undervoltage release (UVR)","Ground-Fault Monitoring Version":"Without","Continuous Current / Rated Value":"400 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU320","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 50%; 100%","Of The Integrated Auxiliary Trip Unit":"3VA9608-0BB11","Product Function / Grounding Protection":"No","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":"LI","number of CO contacts / for auxiliary contacts":"4","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB22","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=297749&mlfb=3VA2340-5HL42-0BL0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5HL42-0BL0/alternatives.json"},"ai":{"faq":[{"question":"Does this MCCB include auxiliary switches and an undervoltage release?","answer":"Yes. The factory configuration includes two auxiliary switches, one trip alarm switch, and one electrical alarm switch (HQ type), plus an integrated undervoltage release (UVR) as the auxiliary release."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-5HL42-0BL0","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/3VA2340-5HL42-0BL0 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}}