{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5JQ32-0AJ0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5JQ32-0AJ0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5JQ32-0AJ0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ32-0AJ0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2 series, molded case circuit breaker 3VA2340-5JQ32-0AJ0, 400 A, 3-pole, ETU560 electronic trip unit, line protection, 187 kA at 240 V.","salesMarkdown":"## 400 A MCCB with ETU560 — selectivity and coordination anchor The Siemens SENTRON 3VA2340-5JQ32-0AJ0 is a 3-pole molded case circuit breaker rated 400 A continuous current, carrying the full 400 A from 40 °C up through 50 °C before the thermal derating curve starts — at 55 °C it holds 375 A, at 60 °C 350 A, and at 70 °C 300 A. That means for a panel designed around a 400 A bus, you get full rating without oversized enclosure ventilation up to 50 °C ambient. Breaking capacity peaks at 187 kA at 240 V, drops to 121 kA at 415 V and 440 V, then to 75.6 kA at 500 V, and 17 kA at 690 V. If you're replacing an older 3VA2 frame, verify the auxiliary contact wiring scheme matches your existing control circuit. ## Integration and panel fit Dimensions are 248 mm height, 138 mm width, 110 mm depth. The 138 mm width means it occupies three 45 mm pole spaces on the DIN rail or mounting plate. The ground fault monitoring uses summation current formation on the L-conductor — that's a residual-current measurement method that detects ground faults by summing the phase currents, not by a separate toroid on the neutral. This matters if your system is a 3-wire delta without a neutral conductor. Maximum power loss is 96 W at full rated current. That's the heat you need to extract from the enclosure — for a panel with multiple breakers at 400 A, the cumulative heat load drives the ventilation or air-conditioning sizing. The derating curve above 50 °C is the practical limit: if your panel ambient hits 70 °C, you can only load this breaker to 300 A. The storage range is wider — that's the limit for warehousing or shipping without climate control, not for running.","metaTitle":"Siemens 3VA2340-5JQ32-0AJ0 SENTRON MCCB, 400 A, ETU560, 187","metaDescription":"Siemens SENTRON 3VA2340-5JQ32-0AJ0 molded case circuit breaker, 400 A rated current, ETU560 electronic trip unit, 187 kA breaking capacity at 240 V. Current production. Sourced to","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"110 mm","Width":"138 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":"Yes","Number of poles":"3","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":"No","Communication Function":"Yes","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 + 1 trip alarm switch 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":"3VA2340-5JQ32-0AA0","Design of the auxiliary release":"Without auxiliary release","Ground fault monitoring version":"Summation current formation L-conductor","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":"Yes","Number of CO contacts / for auxiliary contacts":"3","Protective function of the overcurrent release":"LSIG","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB11","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=391579&mlfb=3VA2340-5JQ32-0AJ0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ32-0AJ0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA2340-5JQ32-0AJ0 at different voltages?","answer":"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. The 187 kA rating at 240 V makes it suitable for high-fault panelboard applications where available fault current is extreme."},{"question":"What does the ETU560 trip unit do on this MCCB?","answer":"The ETU560 is an electronic trip unit with adjustable long-time, short-time, instantaneous, and ground-fault protection curves. It supports zone-selective interlocking for coordination with downstream breakers, allowing you to keep critical feeders alive during branch faults."},{"question":"Where can I buy 3VA2340-5JQ32-0AJ0 and what is the lead time?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for your required quantity and delivery window."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-5JQ32-0AJ0","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/3VA2340-5JQ32-0AJ0 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}}