{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2125-7MS36-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2125-7MS36-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2125-7MS36-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2125-7MS36-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2 series, molded case circuit breaker, 3VA2125-7MS36-0AA0, 25 A, 3-pole, ETU310M electronic trip unit, 330 kA at 240 V.","salesMarkdown":"## SENTRON 3VA2 MCCB with ETU310M — 25 A, 3-Pole, High Interrupting Capacity The Siemens 3VA2125-7MS36-0AA0 is a SENTRON 3VA2 series molded case circuit breaker rated for a continuous current of 25 A across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. The 3-pole frame carries an ETU310M electronic trip unit with an adjustable short-circuit pickup (Ii) from 75 A to 375 A, letting you fine-tune magnetic protection for motor or feeder duty without swapping the breaker. Interrupting capacity is the headline here: 330 kA at 240 V, 242 kA at 415 V and 440 V, 187 kA at 500 V, and 3.8 kA at 690 V. That SCCR headroom means this breaker can sit upstream of a high-fault panel or transformer secondary without cascading — it clears the fault before the main sees it. ## Panel Fit — Footprint and Mounting The breaker measures 105 mm wide, 181 mm high, and 86 mm deep — a standard 3-pole MCCB footprint that fits most 600 V panelboards and enclosure backpanels without a subplate adapter. ## Trip Unit and Adjustability The ETU310M is a basic electronic trip unit — no communication, no phase-failure detection, no ground-fault monitoring. What it does give you is an adjustable short-circuit pickup (75 A to 375 A) and a fixed thermal memory. For a motor branch circuit, set the Ii to 8–10× FLA to ride through inrush; for a feeder, the lower end of the range provides tighter protection against bolted faults.","metaTitle":"Siemens 3VA2125-7MS36-0AA0 SENTRON MCCB, 25 A, 3-Pole, ETU31","metaDescription":"Siemens 3VA2125-7MS36-0AA0 SENTRON molded case circuit breaker, 25 A rated, 3-pole, ETU310M electronic trip. 330 kA at 240 V. Active production. Quoted to order.","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":"330 kA","at 415 V":"242 kA","at 440 V":"242 kA","at 500 V":"187 kA","at 690 V":"3.8 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]":"3.4 in","Width [In]":"4.1 in","Height [In]":"7.1 in","Number Of Poles":"3","Product version":"Starter protection","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Communication Function":"No","Phase Failure Detection":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"75 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":"ETU310M","protection class IP / on the front":"IP40","reference code / acc. to DIN EN 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":"I","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"C","Max. rated operational current of the frame size":"160 A","Max. rated operational voltage Ue with AC 50/60Hz":"690 V","Mechanical Service Life (Switching Cycles) / Typical":"20 000","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=569635&mlfb=3VA2125-7MS36-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2125-7MS36-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA2125-7MS36-0AA0 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 — submit an RFQ to receive a firm commercial offer."},{"question":"What is the interrupting capacity of this MCCB at 415 V?","answer":"At 415 V the 3VA2125-7MS36-0AA0 is rated for 242 kA interrupting capacity. The same rating applies at 440 V; at 240 V it reaches 330 kA."},{"question":"What trip unit does this breaker use?","answer":"It uses the ETU310M electronic trip unit with an adjustable short-circuit pickup range of 75 A to 375 A. No communication, phase-failure detection, or ground-fault monitoring is included."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2125-7MS36-0AA0","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/3VA2125-7MS36-0AA0 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}}