{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-4EF32-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-4EF32-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-4EF32-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4EF32-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1125-4EF32-0AA0, molded case circuit breaker, 3-pole, 25 A at 40 °C, TM240 overcurrent release, 121 kA at 240 V, line protection design.","salesMarkdown":"Its 3-pole construction and 25 A rating at 40 °C make it a fit for feeder circuits, lighting panels, and light industrial loads where the TM240 thermal-magnetic release provides inverse-time overload and instantaneous short-circuit protection. ## Breaking capacity across voltages — what the ratings mean This MCCB carries a 121 kA interrupting rating at 240 V, dropping to 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V. The 25 A rating holds flat from 40 °C through 50 °C, then steps down to 24 A at 55–60 °C and 23 A at 65–70 °C. The 8.5 W maximum power loss is manageable in a standard panel, but if you are ganging multiple breakers in a sealed enclosure, account for the cumulative heat. Dimensions are 130 mm height, 76.2 mm width, 70 mm depth — a compact 3-pole footprint that fits standard MCCB mounting bases in SENTRON and third-party distribution panels. The IP40 protection on the front means it is dust-protected but not sealed against water ingress; install in a dry indoor enclosure.","metaTitle":"Siemens 3VA1125-4EF32-0AA0 SENTRON MCCB, 25A, 3-Pole, 121kA","metaDescription":"Siemens 3VA1125-4EF32-0AA0 SENTRON molded case circuit breaker, 25A rated at 40°C, 3-pole, 121kA breaking capacity at 240V. Active production. 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":"70 mm","Width":"76.2 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]":"3 in","Height [In]":"5.12 in","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":"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","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","operating voltage / at DC / rated value":"500 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":"nut keeper kit on both ends","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/92c0478bf6a6d9e9ddbe8be2ae0aeafe.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=55038&mlfb=3VA1125-4EF32-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4EF32-0AA0/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for 3VA1125-4EF32-0AA0?","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 for a firm price and lead-time estimate."},{"question":"What is the breaking capacity of 3VA1125-4EF32-0AA0 at 240 V?","answer":"The interrupting rating is 121 kA at 240 V, derating to 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at 500 V and 690 V."},{"question":"What is the rated current of 3VA1125-4EF32-0AA0 at 40 °C?","answer":"The continuous current rating is 25 A at 40 °C, holding flat through 50 °C, then derating to 24 A at 55–60 °C and 23 A at 65–70 °C."},{"question":"What compliance documentation does Siemens provide for 3VA1125-4EF32-0AA0?","answer":"As a standard SENTRON catalog item, Siemens provides a declaration of conformity (CE/UKCA), UL/CSA recognition, and RoHS/REACH compliance documentation through their support portal. The IP40 front protection and 800 V rated insulation voltage are design-level compliance indicators for IEC 60947-2."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-4EF32-0AA0","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/3VA1125-4EF32-0AA0 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}}