{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2340-5HN42-0HC0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2340-5HN42-0HC0","canonicalUrl":"https://aoctrl.com/siemens/3VA2340-5HN42-0HC0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5HN42-0HC0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2340-5HN42-0HC0, molded case circuit breaker, 4-pole, 400 A continuous, 187 kA breaking capacity at 240 VAC, line protection design with shunt trip release.","salesMarkdown":"The Siemens SENTRON 3VA2340-5HN42-0HC0 is a 4-pole molded case circuit breaker (MCCB) rated for 400 A continuous current at 40 °C ambient, with a maximum breaking capacity of 187 kA at 240 VAC. The 400 A rating holds steady through 50 °C; above that it derates in 5 °C steps down to 340 A at 70 °C, which matters if you're stuffing this into a hot enclosure with other gear. ## Breaking capacity across voltages Breaking capacity drops as voltage rises: 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 7.5 kA at 690 V. That 7.5 kA at 690 V is the number to check if you're on a 690 V industrial system — it's much lower than the 240 V headline, so coordination studies need to use the right voltage column. ## Integrated shunt trip and auxiliary switches The two auxiliary switches provide status feedback (open/closed) to a PLC or indicator panel.","metaTitle":"Siemens 3VA2340-5HN42-0HC0 SENTRON MCCB, 400A, 187kA at 240V","metaDescription":"Siemens SENTRON 3VA2340-5HN42-0HC0 molded case circuit breaker, 400 A continuous, 187 kA breaking at 240 VAC. Current production. 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","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":"2 auxiliary switches HQ","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":"3VA9688-0BL30","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":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AA12","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=478664&mlfb=3VA2340-5HN42-0HC0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2340-5HN42-0HC0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this MCCB at different voltages?","answer":"At 240 V it is 187 kA, 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. Use the voltage that matches your system for coordination studies."},{"question":"What is the continuous current rating and how does it derate with temperature?","answer":"The continuous current rating is 400 A at 40 °C, 45 °C, and 50 °C. It derates to 385 A at 55 °C, 370 A at 60 °C, 355 A at 65 °C, and 340 A at 70 °C."},{"question":"What auxiliary releases and switches come with this breaker?","answer":"It includes a shunt trip (STL) release for remote tripping and two HQ auxiliary switches for status feedback. No undervoltage release or ground-fault monitoring is fitted on this variant."},{"question":"Where can I buy 3VA2340-5HN42-0HC0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2340-5HN42-0HC0","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/3VA2340-5HN42-0HC0 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}}