{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2125-8KP36-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2125-8KP36-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2125-8KP36-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2125-8KP36-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2125-8KP36-0AA0, molded case circuit breaker, 3-pole, 25 A rated continuous current, ETU850 electronic trip unit, 330 kA breaking capacity at 415 V.","salesMarkdown":"The Siemens SENTRON 3VA2125-8KP36-0AA0 is a 3-pole molded case circuit breaker rated for 25 A continuous current, built around the ETU850 electronic trip unit. The 330 kA breaking capacity at 415 V means it can safely interrupt very high fault currents on a 400 V industrial distribution board, keeping upstream switchgear out of the fault-clearing path. The 3VA2125-8KP36-0AA0 delivers 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 330 kA at 415 V is the figure most panel designers will size against for a 400 V line-side fault. The 52.5 kA at 690 V still covers most 690 V industrial grids, though at that voltage the available fault current is usually lower anyway. ## Active production — no obsolescence concern This order code carries a current lifecycle status from Siemens. No phase-out notice, no last-time-buy window to track. The ETU850 trip unit and communication function are current-generation features. The breaker measures 105 mm wide, 181 mm tall, and 86 mm deep. That 105 mm width is the standard 3-pole MCCB footprint for this SENTRON frame size — it fits the same panel cutout and busbar spacing as other 3VA2 breakers in the same current class. ## Environmental range and thermal performance Rated for operation from -25 °C to 70 °C ambient, with storage from -40 °C to 80 °C. Maximum power loss is 0.5 W, negligible for enclosure heat budgeting.","metaTitle":"Siemens 3VA2125-8KP36-0AA0 SENTRON MCCB, 25 A, 3-Pole, ETU85","metaDescription":"Siemens SENTRON 3VA2125-8KP36-0AA0 molded case circuit breaker, 25 A continuous, 3-pole, ETU850 electronic trip unit, 330 kA breaking capacity at 415 V. Active production. Sourced","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","Maximum":"300 A","Minimum":"38 A","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","Voltage Trigger":"No","lifecycle_stage":"current","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":"Without","Continuous Current / Rated Value":"25 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU850","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 40% to 160%","Product Function / Grounding Protection":"No","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":"LSI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"L","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,"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=303266&mlfb=3VA2125-8KP36-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2125-8KP36-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What trip unit does the 3VA2125-8KP36-0AA0 use?","answer":"The ETU850 electronic trip unit. It provides adjustable overload and short-circuit protection curves and includes a communication function for status and trip reporting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2125-8KP36-0AA0","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/3VA2125-8KP36-0AA0 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}}