{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2125-5MQ36-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2125-5MQ36-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2125-5MQ36-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2125-5MQ36-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2125-5MQ36-0AA0, molded case circuit breaker, 3-pole, 25 A, ETU860M electronic release, 187 kA at 240 V AC.","salesMarkdown":"The ETU860M electronic trip unit provides adjustable trip classes (10A, 10/10E, 20/20E, 30/30E), phase failure detection, and ground-fault monitoring via summation current formation on the L-conductor. This makes it suited for protecting motor feeders where coordination with upstream devices and downstream starting curves matters. Breaking capacity reaches 187 kA at 240 V AC, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. The breaker includes a communication function, allowing integration into a higher-level monitoring or control scheme.","metaTitle":"Siemens 3VA2125-5MQ36-0AA0 SENTRON MCCB, 25 A, ETU860M","metaDescription":"Siemens SENTRON 3VA2125-5MQ36-0AA0 molded case circuit breaker, 25 A rated, ETU860M electronic release, 187 kA at 240 V. 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":"105 mm","Height":"181 mm","at 240 V":"187 kA","at 415 V":"121 kA","at 440 V":"121 kA","at 500 V":"75.6 kA","at 690 V":"3.7 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":"Motor protection","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Communication Function":"Yes","Phase Failure Detection":"Yes","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":"Yes","rated insulation voltage Ui":"800 V","Courant permanent assigné Iu":"25 A","Ground-Fault Monitoring Version":"Summation current formation L-conductor","adjustable trip class (Tc CLASS)":"10A, 10/10E, 20/ 20E, 30/30E","Design Of The Overcurrent Release":"ETU860M","protection class IP / on the front":"IP40","operating power / at AC-3 / at 230 V":"5 500 W","operating power / at AC-3 / at 400 V":"11 000 W","operating voltage / at AC / rated value":"690 V","reference code / according 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.":"5 A","Adjustable response value current / li max.":"375 A","Adjustable response value current / li min.":"75 A","Neutral conductors / upgradeable/retrofittable":"No","Protection Function Of The Overcurrent Release":"LSIG","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"E","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=569629&mlfb=3VA2125-5MQ36-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2125-5MQ36-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA2125-5MQ36-0AA0 and how do I get a price?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time."},{"question":"Will 3VA2125-5MQ36-0AA0 drop into a panel that was specified around 3VA2125-8KQ42-0AA0 without rewiring?","answer":"Both are 3-pole SENTRON MCCBs in the same frame size, so the footprint and mounting are identical. The deciding difference is the trip unit: this one carries an ETU860M electronic release with adjustable trip classes and ground-fault monitoring, while the 8KQ42 variant uses a different release. No rewiring is needed for the power connections, but the control wiring for the trip unit functions may differ."},{"question":"What compliance documentation does this brand provide for 3VA2125-5MQ36-0AA0?","answer":"As a Siemens SENTRON product, it is designed to meet applicable IEC and UL standards for molded case circuit breakers. Specific declarations (RoHS, REACH, UL, IEC) are available from Siemens documentation or upon request with an RFQ."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2125-5MQ36-0AA0","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/3VA2125-5MQ36-0AA0 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}}