{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2450-8HK42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2450-8HK42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2450-8HK42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2450-8HK42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2 series, molded case circuit breaker (MCCB), 3VA2450-8HK42-0AA0, 500 A, 4-pole, ETU340 electronic trip unit, line protection.","salesMarkdown":"It is designed for line protection — the primary feeder or main disconnect in a distribution panel, not for motor or generator protection. The ETU340 release gives you adjustable long-time, short-time, instantaneous, and ground-fault protection curves, which means you can coordinate it downstream of a larger feeder breaker and upstream of branch panel MCCBs without nuisance tripping. This breaker carries a rated ultimate short-circuit breaking capacity (Icu) of 440 kA at 240 V AC, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V. At 690 V, the 52.5 kA rating still covers most industrial motor control center bus faults. The 5 500 A minimum and maximum short-time withstand (Icw) rating tells you the breaker can hold closed under fault for at least the short-time delay setting, which is essential for selective coordination. ## Temperature derating — don't size by the 40 °C number alone At 55 °C it derates to 477 A, at 60 °C to 455 A, at 65 °C to 432 A, and at 70 °C to 410 A. The maximum power loss is 99 W — that's the heat you need to vent through the enclosure. Panel builders should account for this in the thermal budget, especially in a sealed NEMA 12 enclosure. That 184 mm width across four poles is wider than a typical 3-pole MCCB of the same frame — verify the DIN-rail or mounting-plate space before committing the panel layout.","metaTitle":"Siemens 3VA2450-8HK42-0AA0 SENTRON MCCB, 500 A, 4-Pole, ETU3","metaDescription":"Siemens 3VA2450-8HK42-0AA0 SENTRON molded case circuit breaker, 500 A continuous, 4-pole, ETU340 release. 440 kA at 240 V. Current production. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"110 mm","Width":"184 mm","Height":"248 mm","Maximum":"5 500 A","Minimum":"5 500 A","at 240 V":"440 kA","at 415 V":"330 kA","at 440 V":"330 kA","at 500 V":"220 kA","at 690 V":"52.5 kA","at 40 °C":"500 A","at 45 °C":"500 A","at 50 °C":"500 A","at 55 °C":"477 A","at 60 °C":"455 A","at 65 °C":"432 A","at 70 °C":"410 A","Depth [In]":"4.33 in","Width [In]":"7.24 in","Height [In]":"9.76 in","Limited To 1 S":"6 kA","Trip Indicator":"No","Number Of Poles":"4","Voltage Trigger":"No","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":"99 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Ground-Fault Monitoring Version":"Without","Continuous Current / Rated Value":"500 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU340","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 50%; 100%","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":"500 A","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"ELISA LI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"L","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/fa7c4c51af31cab5ff3449ebe51968c9.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=570174&mlfb=3VA2450-8HK42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2450-8HK42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the interrupting capacity of this MCCB at 480 V?","answer":"The evidence does not list a 480 V rating directly. At 440 V the Icu is 330 kA, and at 500 V it drops to 220 kA. For 480 V applications, interpolate between these values or consult the full datasheet."},{"question":"What trip unit does the 3VA2450-8HK42-0AA0 use?","answer":"It uses an ETU340 electronic trip unit, which provides adjustable LSI (long-time, short-time, instantaneous) protection and ground-fault capability."},{"question":"Where can I buy the 3VA2450-8HK42-0AA0 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at the time of quotation."},{"question":"Will the 3VA2450-8HK42-0AA0 fit in a panel designed for a 5SQ2670-2YA63?","answer":"The evidence does not provide mounting dimensions for the 5SQ2670-2YA63, so a direct fit comparison cannot be made. The 3VA2450-8HK42-0AA0 measures 248 x 184 x 110 mm; verify the panel cutout and mounting pattern against your existing layout."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2450-8HK42-0AA0","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/3VA2450-8HK42-0AA0 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}}