{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2125-8KQ32-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2125-8KQ32-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2125-8KQ32-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2125-8KQ32-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2 series, molded case circuit breaker, 3-pole, 25 A, 440 kA at 240 V, ETU860 electronic release, line protection.","salesMarkdown":"The ETU860 electronic trip unit handles the overcurrent release, so you get adjustable protection curves, not a fixed thermal-magnetic snap. ## Breaking capacity — the number that decides the bus The headline here is the interrupting rating: 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 52.5 kA at 690 V. That's a high-energy breaker — it's meant for main or feeder positions where fault current can pile up from multiple transformers or motor contributions. For a panel builder, that means this breaker sits at the head of a distribution board, not in a branch circuit. ## What the ETU860 release gives you That ground-fault function is built into the release, not an add-on module. It communicates (communication function is present), and there's an optional motor drive available for remote charging. The power loss is a minimal 0.5 W at rated current, which keeps the interior of the MCCB cool over its service life. It's an active catalog item in the SENTRON 3VA2 family. For a BOM line, that means you can specify it without worrying about a last-time-buy window.","metaTitle":"Siemens 3VA2125-8KQ32-0AA0 SENTRON MCCB, 25 A, 440 kA","metaDescription":"Siemens 3VA2125-8KQ32-0AA0 SENTRON molded case circuit breaker, 3-pole, 25 A rated current, 440 kA breaking capacity at 240 V. ETU860 release, line protection. Current lifecycle. A","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"86 mm","Width":"105 mm","Height":"181 mm","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":"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]":"4.13 in","Height [In]":"7.13 in","Trip Indicator":"No","Number Of Poles":"3","Product version":"Line protection","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Communication Function":"Yes","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"0.5 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"Yes","Courant permanent assigné Iu":"25 A","Ground-Fault Monitoring Version":"Summation current formation L-conductor","Tension assignée d'isolement Ui":"800 V","Design Of The Overcurrent Release":"ETU860","protection class IP / on the front":"IP40","reference code / acc. to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Adjustable response value current / lg max.":"25 A","Adjustable response value current / lg min.":"15 A","Adjustable response value current / li max.":"300 A","Adjustable response value current / li min.":"38 A","Neutral conductors / upgradeable/retrofittable":"Yes","Protection Function Of The Overcurrent Release":"LSIG","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"L","Max. rated operational current of the frame size":"160 A","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","Type of connectable conductor cross-section, connection screw, width x thickness , min.":"13 x 1 mm"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/641a6843e8dc2f758bb6426196efa871.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=260365&mlfb=3VA2125-8KQ32-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2125-8KQ32-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What trip unit does 3VA2125-8KQ32-0AA0 use?","answer":"It uses the ETU860 electronic overcurrent release with adjustable protection curves and built-in ground-fault monitoring via summation current formation on the L-conductor."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2125-8KQ32-0AA0","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/3VA2125-8KQ32-0AA0 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}}