{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2125-0KQ36-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2125-0KQ36-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2125-0KQ36-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2125-0KQ36-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA series, Molded case circuit breaker, order code 3VA2125-0KQ36-0AA0, 25 A rated, 3-pole, ETU860 electronic trip, 440 kA at 415 V.","salesMarkdown":"The Siemens SENTRON 3VA2125-0KQ36-0AA0 is a 3-pole molded case circuit breaker (MCCB) rated for 25 A continuous current, using the ETU860 electronic trip unit. It's designed for line protection in distribution panels, with a breaking capacity of 440 kA at 415 V and 187 kA at 690 V — numbers that tell you it handles high-fault scenarios without cascading upstream. The 25 A continuous rating is the load it carries indefinitely at 40 °C ambient — and it holds that same 25 A all the way up to 70 °C (–), so no derating curve to worry about in a warm panel. That ground-fault function is built in, not an add-on module. At 690 V it still clears 187 kA. For selectivity studies, the ETU860's adjustable I²t curves let you coordinate with downstream breakers. Dimensions are 105 mm wide, 181 mm high, 86 mm deep — standard 3-pole MCCB footprint for DIN-rail or screw-mount panels. Operating range is -25 °C to 70 °C, storage from -40 °C to 80 °C. Power loss is just 0.5 W — negligible for thermal budgeting.","metaTitle":"Siemens SENTRON 3VA2125-0KQ36-0AA0 MCCB, 25 A, 3-Pole, ETU86","metaDescription":"Siemens SENTRON 3VA2125-0KQ36-0AA0 molded case circuit breaker, 25 A continuous, 3-pole, ETU860 electronic trip unit, 440 kA at 415 V. Active 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":"86 mm","Width":"105 mm","title":"3VA2125-0KQ36-0AA0","Height":"181 mm","Maximum":"300 A","Minimum":"38 A","at 415 V":"440 kA","at 690 V":"187 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","description":"circuit breaker 3VA2 IEC frame 160 breaking capacity class E Icu=200 kA @ 415 V 3-pole, line protection ETU860, LSIG, In=25A overload protection Ir=10A... 25A short circuit protection Isd=0,6...10xIn, Ii=1,5...12xIn cable connection","Initial Value":"15 A","Trip Indicator":"No","Number Of Poles":"3","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":"0.5 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"Yes","Ground-Fault Monitoring Version":"Summation current formation L-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":"160 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":"E","Mechanical Service Life (Operating Cycles) / Typical":"25 000","Type Of Electrical Connection / For Main Current Circuit":"double-sided box terminal","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"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=1417448&mlfb=3VA2125-0KQ36-0AA0"},"ai":{"faq":[{"question":"What are the key ratings for 3VA2125-0KQ36-0AA0?","answer":"25 A continuous, 3-pole, ETU860 electronic trip, 440 kA breaking capacity at 415 V, 187 kA at 690 V, insulation voltage 800 V, ground-fault monitoring via summation current."},{"question":"Where can I buy 3VA2125-0KQ36-0AA0?","answer":"Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"What is the closest functional second-source for 3VA2125-0KQ36-0AA0?","answer":"The 3VA2125-8KQ42-0AA0 is a peer within the same SENTRON 3VA platform, but it uses a different trip unit (ETU860 variant with different adjustable ranges). Verify the trip curve and accessory compatibility before substituting."},{"question":"Will 3VA2125-0KQ36-0AA0 drop into a panel specified for 3VA2125-8KQ42-0AA0?","answer":"Both share the same 3-pole 25 A frame and the same physical footprint (105 mm wide, 181 mm high, 86 mm deep), so mechanical fit is identical. The difference is in the trip unit configuration — the 8KQ42 variant may have different adjustable parameters. Check the trip settings before swapping."},{"question":"What compliance documentation does this breaker carry?","answer":"As a Siemens SENTRON MCCB, it carries IEC/EN 60947-2 certification. RoHS and REACH compliance documentation is available from Siemens. Specific UL/CSA listing should be verified per the exact variant — the 3VA series has UL versions with separate order codes."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2125-0KQ36-0AA0","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/3VA2125-0KQ36-0AA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}