{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5JQ42-0DA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5JQ42-0DA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5JQ42-0DA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ42-0DA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2340-5JQ42-0DA0, 4-pole molded case circuit breaker, 400 A rated continuous current, ETU560 electronic trip unit, 187 kA at 240 V.","salesMarkdown":"## What this 400 A MCCB does for a line-side feeder At 400 V and 440 V the interrupting rating holds at 121 kA, dropping to 75.6 kA at 500 V and 17 kA at 690 V. That voltage-dependent curve is typical for MCCBs — the arc extinguishes harder at higher voltage, so the rating falls off. For a 480 V panel feeding a motor control center, the 121 kA at 415 V is the relevant figure; at 480 V the available fault current is usually lower, but the 121 kA gives you margin. If the panel sits in a hot mezzanine or near a furnace line, that derating curve is what you size the feeder for — not the 400 A nameplate. ## Panel fit and integration details The 184 mm width is a four-pole frame. Maximum power dissipation is 98.5 W at rated load — that heat has to leave the enclosure. In a packed panel with multiple breakers side by side, the cumulative dissipation drives the ventilation or forced-air calculation. ## Ground fault and release options This variant includes ground-fault monitoring via summation current formation on the L + N conductor — it sums the phase and neutral currents and trips if the residual exceeds the threshold set in the ETU560. No voltage trigger or phase failure detection is fitted; those are separate accessory options if the application requires them. For a feeder breaker that cycles once or twice a day, that is effectively lifetime. For a breaker that sees daily load switching (like a welder supply), it is worth tracking the count.","metaTitle":"Siemens 3VA2340-5JQ42-0DA0 SENTRON MCCB, 400 A, 4-Pole, 187","metaDescription":"Siemens SENTRON 3VA2340-5JQ42-0DA0 molded case circuit breaker, 400 A rated continuous current, 4 poles, 187 kA at 240 V. Active production, sourced to order. Request quote.","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":"375 A","at 60 °C":"350 A","at 65 °C":"325 A","at 70 °C":"300 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":"Yes","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":"3VA2340-5JQ42-0AA0","Design of the auxiliary release":"Undervoltage release (UVR)","Ground fault monitoring version":"Summation current formation L + N conductor","Of The Integrated Auxiliary Trip":"3VA9608-0BB25","Design of the overcurrent release":"ETU560","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","Adjustable response value time / tsd max.":"0.5 s","Adjustable response value time / tsd min.":"0.05 s","Undervoltage Release With Leading Contact":"No","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"400 A","Adjustable response value current / lg max.":"400 A","Adjustable response value current / lg min.":"80 A","Adjustable response value current / li max.":"4 000 A","Adjustable response value current / li min.":"600 A","Adjustable response value current / lr min.":"160 A","Adjustable response value current / Isd max.":"4 000 A","Adjustable response value current / Isd min.":"240 A","Ground fault protection can be switched ON/OFF":"Yes","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"0","Protective function of the overcurrent release":"LSIG","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=427009&mlfb=3VA2340-5JQ42-0DA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ42-0DA0/alternatives.json"},"ai":{"faq":[{"question":"Does 3VA2340-5JQ42-0DA0 include an undervoltage release?","answer":"Yes, it includes an undervoltage release (UVR) as standard. The design is a dedicated undervoltage release that opens the breaker when control voltage drops below the dropout threshold."},{"question":"What trip unit is fitted in 3VA2340-5JQ42-0DA0?","answer":"The ETU560 electronic trip unit. It provides adjustable overload (L), short-time (S), instantaneous (I), and ground-fault (G) protection curves, plus communication capability for remote monitoring."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-5JQ42-0DA0","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/3VA2340-5JQ42-0DA0 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}}