{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5JQ42-0AD0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5JQ42-0AD0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5JQ42-0AD0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ42-0AD0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2 series, molded case circuit breaker (MCCB), 3VA2340-5JQ42-0AD0, 400 A rated continuous current, 4-pole, line protection version, with ETU560 electronic trip unit, communication capable, 187 kA breaking capacity at 240 V.","salesMarkdown":"At 240 V it interrupts 187 kA; at 415 V and 440 V that figure holds at 121 kA, dropping to 75.6 kA at 500 V and 17 kA at 690 V — so the breaker's SCCR headroom is highest on lower-voltage 480 V or 240 V delta services, and you need to verify coordination at 690 V if that's your line voltage. The 400 A rating holds from 40 °C through 50 °C ambient; above that it derates linearly to 300 A at 70 °C, which governs placement in a warm enclosure or next to heat-generating gear. ## Trip unit, auxiliaries, and ground-fault monitoring The ETU560 release is an electronic, LSI (long-time, short-time, instantaneous) trip with adjustable curves — not a thermal-magnetic, so it gives better selectivity coordination downstream. The breaker ships with three HQ auxiliary switches (3VA9608-0BB24) and a summation-current ground-fault module that monitors L+N conductors, but no undervoltage release or voltage-trip accessory is fitted. Communication is onboard (PROFIBUS or PROFINET via the 3VA9 communication module, not included), which lets the breaker report status and trip events to a PLC or energy management system without a separate I/O block. At 248 mm high, 184 mm wide, and 110 mm deep, this 4-pole breaker occupies a standard MCCB footprint for 400 A frames. The 110 mm depth is the body-only dimension; allow additional clearance for the rotary handle, auxiliary wiring, and communication cable bend radius.","metaTitle":"Siemens 3VA2340-5JQ42-0AD0 SENTRON MCCB, 400 A, 4-Pole, 187","metaDescription":"Siemens 3VA2340-5JQ42-0AD0 SENTRON molded case circuit breaker, 400 A rated, 4-pole, 187 kA at 240 V. Active production. ETU560 trip unit. 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":"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":"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":"3 auxiliary switches 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":"3VA2340-5JQ42-0AA0","Design of the auxiliary release":"Without auxiliary release","Ground fault monitoring version":"Summation current formation L + N conductor","Of The Integrated Auxiliary Trip":"3VA9608-0BB24","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":"3","Protective function of the overcurrent release":"LSIG","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","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=470540&mlfb=3VA2340-5JQ42-0AD0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ42-0AD0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA2340-5JQ42-0AD0 and get a price?","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 a firm price and lead time."},{"question":"What is the breaking capacity of 3VA2340-5JQ42-0AD0 at different voltages?","answer":"At 240 V it interrupts 187 kA; at 415 V and 440 V it is rated 121 kA; at 500 V it drops to 75.6 kA; at 690 V it is 17 kA. These are the maximum prospective short-circuit currents the breaker can safely clear at each voltage level."},{"question":"Does 3VA2340-5JQ42-0AD0 have communication capability?","answer":"Yes, the breaker is communication-capable (Communication Function: Yes). It accepts a 3VA9 communication module for PROFIBUS or PROFINET integration, enabling remote monitoring and trip-event reporting."},{"question":"What type of trip unit does 3VA2340-5JQ42-0AD0 use?","answer":"It uses an ETU560 electronic overcurrent release with LSI (long-time, short-time, instantaneous) protection curves. This is an adjustable electronic trip, not a fixed thermal-magnetic, giving finer selectivity coordination."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-5JQ42-0AD0","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/3VA2340-5JQ42-0AD0 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}}