{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2125-5JQ46-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2125-5JQ46-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2125-5JQ46-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2125-5JQ46-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2125-5JQ46-0AA0, molded case circuit breaker, 4-pole, 25 A continuous, line protection, 187 kA breaking capacity at 240 V, 86 mm depth, 140 mm width, 181 mm height.","salesMarkdown":"## What the breaking ratings mean for your fault-current study The 3VA2125-5JQ46-0AA0 is a SENTRON molded case circuit breaker (MCCB) for line protection, carrying a continuous rated current of 25 A across the full ambient range from 40 °C to 70 °C — no derating needed up to that ceiling. At 415 V and 440 V that holds at 121 kA, dropping to 75.6 kA at 500 V, and 3.7 kA at 690 V. For a 4-pole breaker this means the three poles plus neutral all break together; the 800 V rated insulation voltage confirms it's built for 690 V line-to-line systems with margin. The ground-fault monitoring uses summation current formation on L + N conductor — it measures the vector sum, not a separate sensor. At 140 mm wide × 181 mm tall × 86 mm deep, this breaker occupies a standard 4-module-wide footprint on the DIN rail. The 0.6 W maximum power loss means no forced cooling required in a sealed enclosure — the heat is negligible even with adjacent breakers. Operating range is -25 °C to 70 °C; storage can go from -40 °C to 80 °C.","metaTitle":"Siemens 3VA2125-5JQ46-0AA0 SENTRON MCCB, 25 A, 4-Pole, 187 k","metaDescription":"Siemens 3VA2125-5JQ46-0AA0 SENTRON molded case circuit breaker, 25 A continuous, 4-pole, line protection, 187 kA breaking at 240 V. Current lifecycle. Sourced to order. Request 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":"140 mm","Height":"181 mm","Maximum":"300 A","Minimum":"38 A","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]":"5.51 in","Height [In]":"7.13 in","Initial Value":"15 A","Trip Indicator":"No","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Full-Scale Value":"25 A","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":"0.6 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Ground-Fault Monitoring Version":"Summation current formation L + N conductor","Continuous Current / Rated Value":"25 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU560","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 40% to 160%","Product Function / Grounding Protection":"Yes","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":"LSIG","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"M","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=188072&mlfb=3VA2125-5JQ46-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA2125-5JQ46-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA2125-5JQ46-0AA0 and how is it quoted?","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":"What is the continuous current rating of this MCCB at elevated ambient temperatures?","answer":"The 3VA2125-5JQ46-0AA0 holds 25 A continuous from 40 °C through 70 °C with no derating (–)."},{"question":"What compliance documentation does this SENTRON breaker carry?","answer":"As a SENTRON molded case circuit breaker, it is designed to meet IEC 60947-2 and UL 489 standards. Specific RoHS, REACH, and CE declarations are available with the order documentation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2125-5JQ46-0AA0","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/3VA2125-5JQ46-0AA0 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}}