{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2025-5KQ42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2025-5KQ42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2025-5KQ42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2025-5KQ42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2025-5KQ42-0AA0, molded case circuit breaker, 4-pole, 25 A continuous, 121 kA at 415 V, line protection design with ground-fault monitoring and communication function.","salesMarkdown":"Four poles handle three-phase plus neutral, or you can land it as a 3-pole with a switched neutral. The interrupting ratings step down with voltage as expected: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3 kA at 690 V. At 415 V, the 121 kA figure covers most industrial services in North America and Europe without a second thought. ## Ground-fault monitoring and communication — panel integration notes This variant includes ground-fault monitoring via summation current formation on L + N conductors — it measures the vector sum of phase and neutral currents to detect leakage to earth. No separate GF relay needed if the trip unit supports it. Communication function is present, so it can talk to a higher-level system for power monitoring or remote tripping; check the trip unit variant for protocol support (PROFIBUS, PROFINET, Modbus). Power loss is 0.84 W maximum, negligible for enclosure thermal calculations.","metaTitle":"Siemens 3VA2025-5KQ42-0AA0 SENTRON MCCB, 25 A, 4-Pole, 121 k","metaDescription":"Siemens SENTRON 3VA2025-5KQ42-0AA0 molded case circuit breaker, 25 A continuous, 4-pole, 121 kA at 415 V. Active production. Quoted to order. Ground-fault monitoring, communication","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"86 mm","Width":"140 mm","Height":"181 mm","Maximum":"300 A","Minimum":"38 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":"3 kA","at 40 °C":"25 A","at 45 °C":"25 A","at 50 °C":"25 A","at 55 °C":"25 A","at 60 °C":"25 A","at 65 °C":"25 A","at 70 °C":"25 A","Depth [In]":"3.39 in","Width [In]":"5.51 in","Height [In]":"7.13 in","Initial Value":"15 A","Trip Indicator":"No","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Full-Scale Value":"25 A","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Line protection","Communication Function":"Yes","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"0.84 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"Yes","Ground-Fault Monitoring Version":"Summation current formation L + N conductor","Continuous Current / Rated Value":"25 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU860","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 40% to 160%","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":"100 A","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LSIG","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"M","Mechanical Service Life (Operating Cycles) / Typical":"25 000","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/700f50ca002748285bd0e74654989358.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=303338&mlfb=3VA2025-5KQ42-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2025-5KQ42-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Who supplies 3VA2025-5KQ42-0AA0 and how is it quoted for volume purchases?","answer":"This part is sourced through independent industrial-automation distribution. Submit an RFQ for current pricing and availability — quotes are confirmed at time of request, not from a static price list."},{"question":"What is the breaking capacity of this MCCB at 415 V?","answer":"121 kA at 415 V, which covers most industrial services without upstream current-limiting fuses."},{"question":"Does this breaker include ground-fault protection?","answer":"Yes, it has ground-fault monitoring via summation current formation on the L + N conductors — no separate GF relay required if the trip unit supports it."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2025-5KQ42-0AA0","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/3VA2025-5KQ42-0AA0 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}}