{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5HN42-0DH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5HN42-0DH0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5HN42-0DH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5HN42-0DH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2340-5HN42-0DH0, molded case circuit breaker, 4-pole, 400 A rated continuous current Iu, ETU350 electronic trip unit, line protection version, with undervoltage release and auxiliary switches.","salesMarkdown":"The breaking capacity varies by system voltage: 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 — so at 480 V you interpolate between the 440 V and 500 V figures, which is typical for a large-frame MCCB protecting a transformer or main feeder. The ETU350 is a basic electronic trip unit with adjustable overload and short-circuit settings, but no communication, phase-failure detection, or ground-fault monitoring — it's a line-protection device, not a motor-protection or power-monitoring breaker. Thermal derating is published: the breaker holds 400 A up to 50 °C, then drops to 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C. Maximum power loss is 98.5 W, which matters for enclosure heat load calculations. The breaker measures 184 mm wide by 248 mm high by 110 mm deep — a standard footprint for a 400 A 4-pole MCCB in the SENTRON 3VA2 frame. It mounts with four screws to a backplate or mounting rail; no DIN-rail clip on this frame size. The undervoltage release and auxiliary contact pack are factory-integrated, so no field-assembly of those accessories is needed — just wire the line and load lugs, connect the UVR coil to the control voltage, and terminate the auxiliary contacts into the PLC or status-monitoring input. The ETU350 trip unit is the supplied basic switch variant (3VA2340-5HN42-0AA0) with the electronic trip module built in. No communication module, so no Modbus or PROFIBUS interface — this is a straightforward distribution breaker, not a smart breaker. The 4-pole design with neutral protection is typical for North American 120/208 V or 277/480 V wye systems where the neutral needs overcurrent protection.","metaTitle":"Siemens 3VA2340-5HN42-0DH0 SENTRON MCCB, 400 A, 4-Pole, ETU3","metaDescription":"Siemens 3VA2340-5HN42-0DH0 SENTRON molded case circuit breaker, 400 A rated continuous current, 4-pole, ETU350 electronic trip unit, 187 kA at 240 V. Active production. Quoted on r","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":"Yes","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":"2 auxiliary switches + 1 trip alarm switch HQ","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":"3VA9608-0BB25","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":"3","Protective function of the overcurrent release":"LSI","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","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=24440&mlfb=3VA2340-5HN42-0DH0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5HN42-0DH0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA2340-5HN42-0DH0 at different voltages?","answer":"The breaking capacity is 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. These are the published interrupting ratings for this 4-pole MCCB."},{"question":"What trip unit does 3VA2340-5HN42-0DH0 have?","answer":"It has an ETU350 electronic trip unit, which is a basic line-protection trip with adjustable overload and short-circuit settings. It does not include communication, phase-failure detection, or ground-fault monitoring."},{"question":"Does 3VA2340-5HN42-0DH0 include an undervoltage release?","answer":"Yes, it includes an undervoltage release (UVR) as the auxiliary release, plus 2 auxiliary switches and 1 trip alarm switch HQ for status feedback."},{"question":"Where can I buy 3VA2340-5HN42-0DH0 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — send an RFQ for a firm lead time and unit price."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-5HN42-0DH0","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/3VA2340-5HN42-0DH0 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}}