{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5HN42-0JA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5HN42-0JA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5HN42-0JA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5HN42-0JA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2340-5HN42-0JA0, molded case circuit breaker, 4-pole, 400 A rated continuous current, 187 kA interrupting capacity at 240 V AC, line protection design, with shunt trip release.","salesMarkdown":"On the interrupting side, this breaker delivers 187 kA at 240 V AC, drops to 121 kA at 415/440 V, and still holds 75.6 kA at 500 V — only at 690 V does it tail off to 7.5 kA. That's a lot of fault-clearing muscle for a 400 A frame; you can coordinate it downstream of a larger feeder without worrying about the breaker becoming the weak link. Temperature derating is baked in: it holds full 400 A up to 50 °C, then steps down to 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C. If your panel hits 60 °C near the top of a NEMA 12 enclosure, you still get 370 A — no need to oversize the frame for a hot corner. ## What's on the van vs. what's in the panel If you're looking at the 3VA1110-5EF32-0LA0 as a possible drop-in, don't assume it. That's a smaller-frame 3VA1, likely a 100 A class, while this 3VA2340 is a 400 A frame with a 4-pole footprint that measures 184 mm wide by 248 mm tall by 110 mm deep. The 3VA1 will be narrower and shallower — you'd be cutting new gland plate holes and reworking the bus bars. No shop, no crane, but you'll need a drill. The 3VA2340-5HN42-0JA0 is built on the base switch variant 3VA2340-5HN42-0AA0, so if you've got that base part on the shelf, the -0JA0 adds the shunt trip release — not a field-fit accessory, it's a factory-integrated variant. Swap the whole breaker, don't try to retrofit. For compliance documentation, Siemens provides the usual package: IEC/EN 60947-2 certification, UL 489 listing for the North American market, and RoHS/REACH declarations. The 3VA series is globally harmonized, so the same order code works across IEC and UL jurisdictions — just verify the specific UL file number against your local inspector's requirements. At 184 mm wide, this 4-pole breaker fills a standard 600 mm wide enclosure with room for side-feed lugs and a neutral bar alongside. The 110 mm depth leaves generous wire-bending space in a 300 mm deep panel — no need to go to a 400 mm deep box just for this breaker. At 70 °C ambient, internal temperature stays within the 70 °C operating max.","metaTitle":"Siemens 3VA2340-5HN42-0JA0 SENTRON MCCB, 400 A, 4-Pole, 187","metaDescription":"Siemens SENTRON 3VA2340-5HN42-0JA0 molded case circuit breaker, 400 A continuous, 4-pole, 187 kA interrupting at 240 VAC. Current production. Available to order. Request a 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","Maximum":"4 000 A","Minimum":"4 000 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":"385 A","at 60 °C":"370 A","at 65 °C":"355 A","at 70 °C":"340 A","Depth [In]":"4.33 in","Width [In]":"7.24 in","Height [In]":"9.76 in","Trip Indicator":"No","Number Of Poles":"4","Voltage Trigger":"Yes","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Line protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"96 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA2340-5HN42-0AA0","Design Of The Auxiliary Switch":"Without","Design Of The Auxiliary Release":"shunt trip (STL)","Ground-Fault Monitoring Version":"Without","Continuous Current / Rated Value":"400 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU350","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 50%; 100%","Of The Integrated Auxiliary Trip Unit":"3VA9688-0BL32","Product Function / Grounding Protection":"No","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":"LSI","number of CO contacts / for auxiliary contacts":"0","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,"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=61424&mlfb=3VA2340-5HN42-0JA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5HN42-0JA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA2340-5HN42-0JA0 and what's the lead time?","answer":"This breaker is sourced and quoted to order through independent industrial distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for the latest lead time and price."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-5HN42-0JA0","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/3VA2340-5HN42-0JA0 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}}