{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2125-5MP36-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2125-5MP36-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2125-5MP36-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2125-5MP36-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2125-5MP36-0AA0, molded case circuit breaker, 3-pole, 25 A, motor protection, ETU550M trip unit, 187 kA at 240 V.","salesMarkdown":"Breaking capacity is the headline here: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 3.7 kA at 690 V. No need to downrate for a hot enclosure — that simplifies panel design in non-climate-controlled environments. ## Motor protection and trip unit The ETU550M trip unit is the electronic brain here — it provides adjustable overload protection, short-circuit protection, and ground-fault monitoring (though this variant ships without ground-fault detection). Communication function is included, meaning this breaker can report status and trip events to a PLC or BMS over the SENTRON communication bus — useful for remote monitoring on a motor control center. Operating power at AC-3 duty (motor switching) is 5.5 kW at 230 V — that's the real-world motor rating for a standard three-phase induction motor. The 25 A frame covers most small-to-medium pump, fan, and conveyor motors. That's a standard SENTRON 3VA2 frame size — it clips onto the DIN rail or mounts via the screw terminals. The 86 mm depth means it fits in shallow enclosures where full-height MCCBs won't clear the door. Mount inside a panel rated for the environment.","metaTitle":"Siemens 3VA2125-5MP36-0AA0 SENTRON MCCB, 25 A, 187 kA at 240","metaDescription":"Siemens SENTRON 3VA2125-5MP36-0AA0 molded case circuit breaker, 25 A rated, 187 kA breaking at 240 V. Motor protection with ETU550M. Current production. Quoted on request.","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":"No","Courant permanent assigné Iu":"25 A","Ground-Fault Monitoring Version":"Without","Tension assignée d'isolement Ui":"800 V","Design Of The Overcurrent Release":"ETU550M","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","reference code / acc. to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","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":"LSI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"M","Max. rated operational current of the frame size":"160 A","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","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=1133435&mlfb=3VA2125-5MP36-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2125-5MP36-0AA0/alternatives.json"},"ai":{"faq":[{"question":"What trip unit does this MCCB use?","answer":"The ETU550M electronic trip unit, designed for motor protection with adjustable overload and short-circuit settings, plus phase failure detection."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2125-5MP36-0AA0","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/3VA2125-5MP36-0AA0 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}}