{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2125-6HN36-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2125-6HN36-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2125-6HN36-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2125-6HN36-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2125-6HN36-0AA0, molded case circuit breaker, 25 A, 3-pole, ETU350 electronic trip unit, line protection, IP40 front.","salesMarkdown":"That flat thermal curve is unusual for an MCCB this compact; most competitors start rolling back above 50 °C. For a panel builder, that means you can dial in selectivity with downstream breakers without swapping the whole device. Breaking capacity is the headline number here: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 3.7 kA at 690 V. At 690 V the capacity drops to 3.7 kA, which still handles most motor branch circuits at that voltage level. Power loss is 0.6 W maximum, negligible for thermal budgeting inside a crowded panel. ## Integration notes — what the trip unit and options mean The ETU350 electronic trip unit supports adjustable overload protection (Ir), short-time delay (Isd), and instantaneous (Ii) settings, plus ground-fault alarm or trip if the optional module is fitted — this base version ships without ground-fault monitoring. There is no undervoltage release, no voltage trigger, and no communication function built in, so it is a standalone breaker for line protection. The product extension for a motor drive is listed as optional, meaning the breaker frame accepts a rotary-handle or motor-operated mechanism accessory if remote switching is needed later. No trip indicator on the front; fault indication is through the handle position only.","metaTitle":"Siemens 3VA2125-6HN36-0AA0 SENTRON MCCB, 25 A, 3-Pole, ETU35","metaDescription":"Siemens 3VA2125-6HN36-0AA0 SENTRON molded case circuit breaker, 25 A continuous, 3-pole, ETU350 electronic trip unit. Breaking capacity 242 kA at 240 V. Current lifecycle. Quoted t","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":"242 kA","at 415 V":"187 kA","at 440 V":"187 kA","at 500 V":"121 kA","at 690 V":"3.7 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":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"0.6 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","rated insulation voltage Ui":"800 V","Courant permanent assigné Iu":"25 A","Ground-Fault Monitoring Version":"Without","Design Of The Overcurrent Release":"ETU350","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 / li max.":"300 A","Adjustable response value current / li min.":"300 A","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LSI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"H","Max. rated operational current of the frame size":"160 A","Mechanical Service Life (Switching 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","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=118883&mlfb=3VA2125-6HN36-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2125-6HN36-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA2125-6HN36-0AA0 at 415 V?","answer":"187 kA at 415 V, which is the same rating as at 440 V. At 240 V it reaches 242 kA, and at 690 V it is 3.7 kA."},{"question":"Where can I buy 3VA2125-6HN36-0AA0?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit a request for the quantity you need."},{"question":"What is the continuous current rating of 3VA2125-6HN36-0AA0?","answer":"25 A continuous (Iu), and it holds that rating from 40 °C to 70 °C ambient with no derating."},{"question":"Does 3VA2125-6HN36-0AA0 have a ground-fault monitoring function?","answer":"No, this version ships without ground-fault monitoring. The ETU350 trip unit can accept an optional ground-fault module, but it is not included on this order code."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2125-6HN36-0AA0","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/3VA2125-6HN36-0AA0 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}}