{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5HN42-0BA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5HN42-0BA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5HN42-0BA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5HN42-0BA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2340-5HN42-0BA0, molded case circuit breaker, 4-pole, 400 A rated continuous current, 187 kA breaking capacity at 240 V, ETU350 electronic trip unit, undervoltage release, line protection version.","salesMarkdown":"## What this 400 A MCCB delivers The Siemens SENTRON 3VA2340-5HN42-0BA0 is a 4-pole molded case circuit breaker rated for 400 A continuous current at 40 °C, with a 187 kA interrupting capacity at 240 V — that is the short-circuit current it can safely clear without welding contacts or rupturing the case, critical for high-fault service-entrance or distribution panels where upstream transformer capacity is large. At 415 V and 440 V it still delivers 121 kA; at 500 V it drops to 75.6 kA; and at 690 V it holds 17 kA. That voltage-dependent curve is typical for MCCBs — the arc energy scales with voltage, so the same mechanism interrupts less current at higher potentials. For a 400 V three-phase panel this breaker gives substantial headroom above typical available fault currents. In a sealed, uncooled enclosure this matters — if the panel ambient runs 60 °C, you lose 30 A of headroom. The 184 mm width and 248 mm height place it in the standard SENTRON 3VA frame footprint, and the 110 mm depth fits typical distribution board gutters without gland-plate interference. ## Integrated undervoltage release","metaTitle":"Siemens 3VA2340-5HN42-0BA0 SENTRON MCCB, 400 A, 187 kA","metaDescription":"Siemens SENTRON 3VA2340-5HN42-0BA0 molded case circuit breaker, 400 A rated, 187 kA at 240 V, ETU350 release, undervoltage trip. 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":"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","Latching - endurance":"15 000","Undervoltage Release":"Yes","Communication Function":"No","Phase failure detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","Power loss [W] / maximum":"98.5 W","Auxiliary contact version":"Without","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":"Undervoltage release (UVR)","Ground fault monitoring version":"Without","Of The Integrated Auxiliary Trip":"3VA9608-0BB11","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 / Ir max.":"400 A","Adjustable response value current / li max.":"4 000 A","Adjustable response value current / li min.":"4 000 A","Adjustable response value current / lr min.":"160 A","Adjustable response value current / Isd max.":"0 A","Adjustable response value current / Isd min.":"0 A","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"0","Protective function of the overcurrent release":"LSI","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","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=197988&mlfb=3VA2340-5HN42-0BA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5HN42-0BA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA2340-5HN42-0BA0 and what is the lead time?","answer":"This MCCB is sourced to order through independent distribution; submit an RFQ for current availability and pricing — lead time is confirmed at quote time."},{"question":"What trip unit does the 3VA2340-5HN42-0BA0 use?","answer":"It uses the ETU350 electronic overcurrent release, which supports adjustable LSI protection curves for selective coordination."},{"question":"Does this breaker include an undervoltage release?","answer":"Yes, it ships with a factory-integrated undervoltage release (UVR), part number 3VA9608-0BB11."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-5HN42-0BA0","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/3VA2340-5HN42-0BA0 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}}