{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2125-0KP36-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2125-0KP36-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2125-0KP36-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2125-0KP36-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2125-0KP36-0AA0, molded case circuit breaker, 3-pole, 25 A continuous, ETU850 electronic trip unit, 440 kA breaking capacity at 415 V AC, 690 V AC rated voltage, IP40 front.","salesMarkdown":"## Siemens 3VA2125-0KP36-0AA0 — 25 A SENTRON MCCB with ETU850 Trip The Siemens 3VA2125-0KP36-0AA0 is a SENTRON molded case circuit breaker (MCCB) rated for 25 A continuous current, built around the ETU850 electronic trip unit. It's a 3-pole line-protection device with a 440 kA interrupting capacity at 415 V AC — that rating tells you it can clear a fault up to that level without upstream devices needing to coordinate, which matters when you're protecting a feeder in a high-fault panel. The ETU850 gives you adjustable N-conductor protection (OFF, 40% to 160%) and a communication function, so it fits into a monitored distribution scheme. The ETU850 trip unit provides electronic overload and short-circuit protection with adjustable settings, which gives you finer coordination than a fixed thermal-magnetic breaker. The 440 kA at 415 V and 187 kA at 690 V are the maximum fault currents the breaker can safely interrupt at those voltages — in a panel with available fault current below those numbers, this breaker clears the fault without catastrophic failure. ## Physical Integration — Panel Fit The 3VA2125-0KP36-0AA0 measures 105 mm wide, 181 mm high, and 86 mm deep. That width is the critical dimension for DIN-rail or panel-mount spacing — three of these side by side take 315 mm of rail width.","metaTitle":"Siemens 3VA2125-0KP36-0AA0 SENTRON MCCB, 25 A, ETU850, 440 k","metaDescription":"Siemens 3VA2125-0KP36-0AA0 SENTRON molded case circuit breaker, 25 A continuous, ETU850 electronic trip, 440 kA at 415 V AC. Current lifecycle. 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","title":"3VA2125-0KP36-0AA0","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 ETU850, LSI, In=25A overload protection Ir=10A... 25A short circuit protection Isd=0,6...10xIn, Ii=1,5...12xIn cable connection","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":"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=1417444&mlfb=3VA2125-0KP36-0AA0"},"ai":{"faq":[{"question":"Where can I buy 3VA2125-0KP36-0AA0 and how do I get a price?","answer":"The part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time."},{"question":"What is 3VA2125-0KP36-0AA0's listed depth?","answer":"The depth is 86 mm, which fits within a standard 200 mm deep enclosure."},{"question":"What is 3VA2125-0KP36-0AA0's listed width?","answer":"The width is 105 mm, so three units side by side occupy 315 mm of DIN rail."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2125-0KP36-0AA0","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/3VA2125-0KP36-0AA0 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}}