{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5HN42-0AB0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5HN42-0AB0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5HN42-0AB0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5HN42-0AB0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2340-5HN42-0AB0, molded case circuit breaker, 4-pole, 400 A, ETU350 electronic trip unit, line protection, IP40 front, 110 × 184 × 248 mm.","salesMarkdown":"## Siemens SENTRON 3VA2340-5HN42-0AB0 — 400 A MCCB with ETU350 Trip Unit The Siemens 3VA2340-5HN42-0AB0 is a SENTRON molded case circuit breaker (MCCB) rated for 400 A continuous current at 40 °C through 50 °C, with a 4-pole configuration and an ETU350 electronic overcurrent release. The interrupting ratings are substantial: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 17 kA at 690 V. ## Interrupting Capacity and SCCR Planning For a site electrical engineer doing a selective coordination study, those numbers give headroom to avoid nuisance upstream tripping. The breaker carries 400 A continuously up to 50 °C ambient, then derates to 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C. In a sealed panel with limited airflow, that derating curve is the real selection parameter — not the 400 A nameplate. The enclosure dimensions (248 mm height, 184 mm width, 110 mm depth) fit standard SENTRON 3VA mounting footprints; check the panel cutout against the existing 3VA backplate or DIN-rail adapter. ## Trip Unit and Auxiliary Contacts It ships without undervoltage release, voltage trigger, phase failure detection, or communication function — this is a straightforward line-protection breaker, not a smart breaker. Two auxiliary switches (HP type) are integrated for status feedback to the PLC or SCADA system. The basic switch variant is 3VA2340-5HN42-0AA0. The storage limits govern handling and warehousing, not running conditions. Maximum power loss is 96 W — account for that in the enclosure thermal budget.","metaTitle":"Siemens 3VA2340-5HN42-0AB0 SENTRON MCCB, 400 A, 4-Pole, ETU3","metaDescription":"Siemens SENTRON 3VA2340-5HN42-0AB0 molded case circuit breaker, 400 A rated, 4-pole, ETU350 release, 187 kA at 240 V. Current production. Quoted 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","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"121 kA","at 500 V":"75.6 kA","at 690 V":"17 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","Trip indicator":"No","Number of poles":"4","Product version":"Line protection","Voltage trigger":"No","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Undervoltage Release":"No","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Power loss [W] / maximum":"96 W","Auxiliary contact version":"2 auxiliary switches HP","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Rated continuous current Iu":"400 A","Rated insulation voltage Ui":"800 V","Of The Supplied Basic Switch":"3VA2340-5HN42-0AA0","Design of the auxiliary release":"Without auxiliary release","Ground fault monitoring version":"Without","Design of the overcurrent release":"ETU350","Protection class IP / on the front":"IP40","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"17","Adjustable response value time / tr min.":"0.5","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"Yes","Adjustable response value current / lg min.":"0 A","Adjustable response value current / li max.":"4 000 A","Adjustable response value current / li min.":"4 000 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"2","Protection Function Of The Overcurrent Release":"LSI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA11","Switching capacity class of the circuit breaker":"M","Max. rated operational current of the frame size":"400 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Mechanical service life (switching cycles) / typical":"15 000","Type of electrical connection / for main current circuit":"Lug terminal","Arrangement of electrical connectors / for main current circuit":"Front terminal","Type of connectable conductor cross-section, connection screw, width x thickness , max.":"35 x 10","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"20 x 1"}},"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=374344&mlfb=3VA2340-5HN42-0AB0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5HN42-0AB0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting capacity of 3VA2340-5HN42-0AB0 at 415 V?","answer":"121 kA at 415 V, and the same at 440 V. At 240 V it reaches 187 kA, at 500 V it is 75.6 kA, and at 690 V it is 17 kA."},{"question":"Does 3VA2340-5HN42-0AB0 include ground fault monitoring?","answer":"No, it ships without ground fault monitoring. The ETU350 trip unit can support ground-fault protection with an external sensor, but this specific variant does not include it."},{"question":"Where can I buy 3VA2340-5HN42-0AB0?","answer":"This part is sourced 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/3VA2340-5HN42-0AB0","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/3VA2340-5HN42-0AB0 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}}