{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5JQ42-0DH0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5JQ42-0DH0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5JQ42-0DH0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5JQ42-0DH0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2340-5JQ42-0DH0, molded case circuit breaker (MCCB), 4-pole, 400 A rated at 40 °C, line protection, 187 kA breaking at 240 V, with undervoltage release and communication function.","salesMarkdown":"## MCCB for 400 A feeder protection With a maximum frame rating of 4 000 A and a minimum setting of 600 A, this breaker covers heavy feeder and main-switch duty. At 690 V the interrupting rating drops to 7.5 kA, so verify the system voltage against the curve. ## Thermal derating and power dissipation This MCCB holds 400 A continuously up to 50 °C ambient. Above that it derates linearly: 375 A at 55 °C, 350 A at 60 °C, 325 A at 65 °C, and 300 A at 70 °C. Maximum power loss is 98.5 W — that heat stays inside the enclosure, so factor it into the panel thermal budget. ## Integrated auxiliary and release options The trip indicator is present, and the trip unit is adjustable from 80 A to 400 A full-scale, with no voltage-trigger function. Dimensions: 248 mm high, 184 mm wide, 110 mm deep. That's a 4-pole MCCB footprint — roughly 7.24 × 9.76 × 4.33 inches. The base switch variant is 3VA2340-5JQ42-0AA0, meaning this -0DH0 version adds the aux switches and UVR as factory-fitted options.","metaTitle":"Siemens 3VA2340-5JQ42-0DH0 SENTRON MCCB, 400 A, 4-Pole, 187","metaDescription":"Siemens SENTRON 3VA2340-5JQ42-0DH0 molded case circuit breaker, 400 A rated at 40 °C, 4-pole, 187 kA breaking at 240 V. Active production. Quoted to order against RFQ.","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","title":"3VA2340-5JQ42-0DH0","Height":"248 mm","Maximum":"4 000 A","Minimum":"600 A","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"121 kA","at 500 V":"75.6 kA","at 690 V":"7.5 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","Depth [In]":"4.33 in","Width [In]":"7.24 in","Height [In]":"9.76 in","description":"circuit breaker 3VA2 IEC frame 400 breaking capacity class M Icu=55kA @ 415V 4-pole, line protection ETU560, LSIG, In=400A overload protection Ir=160A...400A short-circuit protection Isd=0.6...10 x In, Ii=1.5 x In N conductor protection adjustable (OFF, up to 100%) gr.-fault prot., can be sw. off Ig=0.2...1 x In= tg=0.05-0.8s nut keeper kit undervoltage release (UVR) 208-230V AC 50/60Hz 2 auxiliary switches HQ 1 trip alarm switch HQ","Initial Value":"80 A","Trip Indicator":"Yes","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Full-Scale Value":"400 A","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"Yes","Design Of The Product":"Line protection","Communication Function":"Yes","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"98.5 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA2340-5JQ42-0AA0","Design Of The Auxiliary Switch":"2 auxiliary switches + 1 trip alarm switch HQ","Design Of The Auxiliary Release":"undervoltage release (UVR)","Ground-Fault Monitoring Version":"Summation current formation L + N conductor","Continuous Current / Rated Value":"400 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU560","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 20% to 100%","Of The Integrated Auxiliary Trip Unit":"3VA9608-0BB25","Product Function / Grounding Protection":"Yes","operating voltage / at AC / rated value":"690 V","reference code / according to IEC 81346-2":"Q","Continuous Current / Rated Value / Maximum":"400 A","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LSIG","number of CO contacts / for auxiliary contacts":"3","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","Switching Capacity Class Of The Circuit Breaker":"M","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"on both sides nut keeper kit","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"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=103667&mlfb=3VA2340-5JQ42-0DH0"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA2340-5JQ42-0DH0?","answer":"Submit an RFQ through this listing. Availability and current pricing are confirmed at quote time through independent distribution channels."},{"question":"What is the breaking capacity of 3VA2340-5JQ42-0DH0 at 240 V?","answer":"187 kA at 240 V. At 415 V and 440 V it is 121 kA, at 500 V it is 75.6 kA, and at 690 V it is 7.5 kA."},{"question":"What are the physical dimensions of this MCCB?","answer":"248 mm high, 184 mm wide, 110 mm deep (9.76 × 7.24 × 4.33 inches)."},{"question":"What auxiliary switches and releases are fitted on this variant?","answer":"It includes 2 auxiliary switches plus 1 trip alarm switch (HQ design), and an undervoltage release (UVR). Communication function is built in."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-5JQ42-0DH0","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/3VA2340-5JQ42-0DH0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}