{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-5EF32-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-5EF32-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-5EF32-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-5EF32-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA molded case circuit breaker, 3VA1125-5EF32-0AA0, 3-pole, 25 A rated at 40 °C, TM240 thermal-magnetic release, 187 kA breaking capacity at 240 V AC.","salesMarkdown":"## Rating and fit for the panel The Siemens SENTRON 3VA1125-5EF32-0AA0 is a 3-pole molded case circuit breaker rated 25 A at 40 °C, with a TM240 thermal-magnetic release — the thermal element carries the continuous load, the magnetic trip handles short-circuit protection. Front IP40 protection means it's splash-safe in a closed enclosure but not washdown-rated; mount inside a cabinet for environments with dust or moisture. ## Current derating across temperature Rated current holds at 25 A up to 50 °C ambient, then drops to 24 A at 55–60 °C and 23 A at 65–70 °C. That derating curve matters if the breaker sits near transformers or drives that push panel internal temperature above 50 °C — you lose about 8 % of the continuous rating at the high end. Short-circuit breaking capacity varies with system voltage: 187 kA at 240 V, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 500/690 V. At 400 V class (common in European panels) the 121 kA rating is well above typical transformer fault levels — no need to cascade an upstream current-limiting fuse in most installations. ## Physical footprint and mounting Dimensions: 130 mm height, 76.2 mm width (3 in), 70 mm depth. Power loss is 8.5 W maximum, which is low enough to avoid forced ventilation in a typical 600 mm wide enclosure.","metaTitle":"Siemens SENTRON 3VA1125-5EF32-0AA0 MCCB, 25 A, 3-Pole, 187 k","metaDescription":"Siemens SENTRON 3VA1125-5EF32-0AA0 molded case circuit breaker, 25 A rated, 3-pole, 187 kA breaking at 240 V. Active production. Sourced to order — RFQ for current pricing and avai","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":"187 kA","at 415 V":"121 kA","at 440 V":"75.6 kA","at 500 V":"17 kA","at 690 V":"17 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":"M","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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=344084&mlfb=3VA1125-5EF32-0AA0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-5EF32-0AA0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1125-5EF32-0AA0 and how do I get a price?","answer":"This part is sourced to order through independent distribution. Submit an RFQ — availability and current pricing are confirmed at quote time."},{"question":"What is the breaking capacity of 3VA1125-5EF32-0AA0 at 240 V?","answer":"The breaking capacity at 240 V AC is 187 kA. At 415 V it is 121 kA, at 440 V it is 75.6 kA, and at 500/690 V it is 17 kA."},{"question":"What is the rated current of 3VA1125-5EF32-0AA0 at 40 °C?","answer":"The rated current is 25 A at 40 °C ambient. It holds at 25 A up to 50 °C, then derates to 24 A at 55–60 °C and 23 A at 65–70 °C."},{"question":"What are the physical dimensions of 3VA1125-5EF32-0AA0?","answer":"Height 130 mm, width 76.2 mm (3 in), depth 70 mm. The 3-inch width is standard for 3-pole MCCBs in panel-mount or DIN-rail enclosures."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-5EF32-0AA0","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/3VA1125-5EF32-0AA0 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}}