{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-4EF46-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-4EF46-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-4EF46-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4EF46-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1125-4EF46-0AA0, molded case circuit breaker, 4-pole, 25 A rated current at 40 °C, 121 kA interrupting capacity at 240 V, TM240 overcurrent release, line protection design.","salesMarkdown":"## Siemens SENTRON 3VA1125-4EF46-0AA0 — 25 A, 4-Pole MCCB for Line Protection The interrupting rating of 121 kA at 240 V gives substantial fault-current headroom for high-capacity downstream networks. With a width of 101.6 mm (4 in), height of 130 mm (5.12 in), and depth of 70 mm (2.76 in), this MCCB fits standard Siemens SENTRON panel footprints. The IP40 protection on the front face suits indoor switchboard mounting where tools-only access is acceptable. The 4-pole configuration handles three-phase-plus-neutral systems common in European and Asian distribution architectures. ## Interrupting Capacity — What the Ratings Mean The interrupting capacity drops with system voltage: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. Temperature derating is mild: the 25 A rating holds steady from 40 °C through 50 °C, then drops to 24 A at 55–60 °C and 23 A at 65–70 °C. In a crowded panel with ambient above 50 °C, plan for a 1–2 A reduction per pole rather than a full frame upsizing.","metaTitle":"Siemens 3VA1125-4EF46-0AA0 SENTRON MCCB, 25 A, 4-Pole, 121 k","metaDescription":"Siemens SENTRON 3VA1125-4EF46-0AA0 molded case circuit breaker, 25 A rated, 4 poles, 121 kA interrupting at 240 V. Active production. Sourced to order. Request a quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"101.6 mm","Height":"130 mm","Maximum":"0 A","Minimum":"0 A","at 240 V":"121 kA","at 415 V":"75.6 kA","at 440 V":"52.5 kA","at 500 V":"11.9 kA","at 690 V":"11.9 kA","at 40 °C":"25 A","at 45 °C":"25 A","at 50 °C":"25 A","at 55 °C":"24 A","at 60 °C":"24 A","at 65 °C":"23 A","at 70 °C":"23 A","Depth [In]":"2.76 in","Width [In]":"4 in","Height [In]":"5.12 in","Trip Indicator":"No","Number Of Poles":"4","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":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"8.5 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Ground-Fault Monitoring Version":"Without","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"TM240","Design Of Short-Circuit Protection":"For switching power values in DC networks, see the 3VA molded case circuit breaker device manual; link to be found under Service & Support in the last chapter","protection class IP / on the front":"IP40","design of the N-conductor protection":"without","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"600 V","reference code / according to IEC 81346-2":"Q","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"S","Mechanical Service Life (Operating Cycles) / Typical":"20 000","Type Of Electrical Connection / For Main Current Circuit":"box terminal on both sides","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=21897&mlfb=3VA1125-4EF46-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4EF46-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Will the 3VA1125-4EF46-0AA0 fit in a panel designed for a 3VA1110-5ED36-0AA0?","answer":"Both breakers share the same SENTRON 3VA frame dimensions — 101.6 mm width, 130 mm height, 70 mm depth — so they are mechanically interchangeable in the same panel cutout and busbar system. The electrical ratings differ (25 A vs. a lower rating), so verify the load current matches before swapping."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-4EF46-0AA0","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/3VA1125-4EF46-0AA0 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}}