{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2125-8KQ46-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2125-8KQ46-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2125-8KQ46-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2125-8KQ46-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"SENTRON 3VA2125-8KQ46-0AA0, 4-pole molded case circuit breaker, 25 A rated continuous current, ETU860 electronic trip unit, 440 kA breaking capacity at 240 V, 86 x 140 x 181 mm.","salesMarkdown":"The SENTRON 3VA2125-8KQ46-0AA0 is a 4-pole molded case circuit breaker (MCCB) rated for line protection, carrying a continuous current Iu of 25 A that holds flat across the full 40 °C to 70 °C operating range — no derating needed as the panel warms up, which is unusual for a compact-frame MCCB. The ETU860 electronic trip unit gives you adjustable long-time delay (tr) from 0.5 s to 25 s and N-conductor protection configurable OFF or 40 % to 160 % of the phase setting, so it handles both 3-phase and 3-phase + N distribution without a separate neutral breaker. Breaking capacity is the headline figure here: 440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 53 kA at 690 V. The IP40 front protection means it's splash-resistant from the front but not sealed; install it in a clean indoor panel, not a washdown zone. The built-in communication function means it can integrate with higher-level monitoring systems via the SENTRON communication modules — useful for energy management or remote trip indication in a BMS or SCADA environment. The 3VA2163-8JQ32-0AA0 is the nearest functional sibling — same 4-pole frame, same ETU860 trip unit family, but rated for a higher continuous current. The deciding factor between them is the load current: the 3VA2125-8KQ46-0AA0 tops out at 25 A, while the 3VA2163-8JQ32-0AA0 carries a higher rating. If your BOM specifies 25 A, this is the correct order code; the sibling won't drop in without rewiring the load side. ## Deployment context Ground-fault monitoring via summation current formation (L + N) is built into the ETU860 — no external GFCI module needed for residual current detection.","metaTitle":"3VA2125-8KQ46-0AA0 SENTRON MCCB, 4-pole, 25 A, ETU860, 440 k","metaDescription":"SENTRON 3VA2125-8KQ46-0AA0 molded case circuit breaker, 4-pole, 25 A rated, ETU860 release, 440 kA at 240 V. Active production, sourced to order against RFQ.","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","at 240 V":"440 kA","at 415 V":"330 kA","at 440 V":"330 kA","at 500 V":"220 kA","at 690 V":"53 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]":"3.4 in","Width [in]":"5.5 in","Height [in]":"7.1 in","Number of poles":"4","Product version":"Line protection","lifecycle_stage":"current","Product brand name":"SENTRON","Product designation":"Molded case circuit breaker","Latching - endurance":"20 000","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":"-40 °C","Other Measurement Function":"Yes","Rated continuous current Iu":"25 A","Rated insulation voltage Ui":"800 V","Ground fault monitoring version":"Summation current formation L + N conductor","Design of the overcurrent release":"ETU860","Protection class IP / on the front":"IP40","Design of the N-conductor protection":"adjustable OFF; 40% bis160%","Reference code / acc. to DIN EN 81346-2":"Q","Adjustable response value time / tr max.":"25","Adjustable response value time / tr min.":"0.5","Adjustable response value time / tsd max.":"0.5 s","Adjustable response value time / tsd min.":"0.05 s","Product extension / optional / motor drive":"Yes","Adjustable response value current / Ir max.":"25 A","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","Adjustable response value current / lr min.":"10 A","Adjustable response value current / tg max.":"0.8 s","Adjustable response value current / tg min.":"0.05 s","Adjustable response value current / Isd max.":"250 A","Adjustable response value current / Isd min.":"15 A","Ground fault protection can be switched ON/OFF":"Yes","Neutral conductors / upgradeable/retrofittable":"No","Number of CO contacts / for auxiliary contacts":"0","Protective function of the overcurrent release":"LSIG","Switching capacity class of the circuit breaker":"L","Max. rated operational current of the frame size":"160 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Type of electrical connection / for main current circuit":"box terminal","Arrangement of electrical connectors / for main current circuit":"Front terminal","Type of connectable conductor cross-section, round conductor terminal, stranded":"1 x (6-120 mm²)"}},"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=217222&mlfb=3VA2125-8KQ46-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2125-8KQ46-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of this MCCB at different voltages?","answer":"440 kA at 240 V, 330 kA at 415 V and 440 V, 220 kA at 500 V, and 53 kA at 690 V. These are the maximum fault currents it can safely interrupt at each voltage level."},{"question":"What trip unit does the 3VA2125-8KQ46-0AA0 use?","answer":"It uses the ETU860 electronic trip unit with adjustable long-time delay (tr) from 0.5 s to 25 s and configurable N-conductor protection (OFF, 40 %, 60 %, 80 %, 100 %, 160 %)."},{"question":"Where can I buy the 3VA2125-8KQ46-0AA0 and how is it quoted?","answer":"It is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2125-8KQ46-0AA0","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/3VA2125-8KQ46-0AA0 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}}