{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1125-4EF32-0AF0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1125-4EF32-0AF0","canonicalUrl":"https://aoctrl.com/siemens/3VA1125-4EF32-0AF0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4EF32-0AF0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1125-4EF32-0AF0, 3-pole molded case circuit breaker, 25 A rated at 40 °C, interrupting rating 121 kA at 240 VAC, line protection design, TM240 release.","salesMarkdown":"## What the interrupting ratings mean for panel coordination The 3VA1125-4EF32-0AF0 is a Siemens SENTRON 3-pole molded case circuit breaker rated 25 A at 40 °C, with a TM240 thermal-magnetic release for line protection. Its interrupting capacity reaches 121 kA at 240 V, 75.6 kA at 415 V, and 52.5 kA at 440 V — numbers that tell you this breaker can clear high-fault currents in a low-voltage distribution board without upstream fuses needing to open first. That 121 kA at 240 VAC is the headline figure for North American panels where the available fault current is high; the 75.6 kA at 415 V and 52.5 kA at 440 V cover the European 400 V class. At 500 V and 690 V the rating drops to 11.9 kA, which still handles most motor-circuit faults but means you verify the point-of-supply SCCR if you're on a 690 V industrial grid. ## Thermal derating — where the 25 A holds and where it drops At 55 °C and 60 °C it derates to 24 A; at 65 °C and 70 °C it drops to 23 A. That flat 25 A band up to 50 °C is useful for panels with moderate internal temperature rise — you don't lose headroom until the enclosure runs hot. ## Physical fit and internal switch configuration The breaker measures 76.2 mm wide, 130 mm tall, and 70 mm deep — a standard SENTRON 3VA frame that fits the same panel cutout as other 3-pole 3VA units.","metaTitle":"Siemens 3VA1125-4EF32-0AF0 SENTRON MCCB, 25 A, 3-Pole, 121 k","metaDescription":"Siemens SENTRON 3VA1125-4EF32-0AF0 molded case circuit breaker, 25 A, 3-pole, interrupting rating 121 kA at 240 VAC. Active lifecycle. Sourced to order. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"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":"Yes","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","Of The Supplied Basic Switch":"3VA11254EF320AA0","Design Of The Auxiliary Switch":"1 auxiliary switch + 1 trip alarm switch HQ","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":"2","Of The Integrated Auxiliary Switch/Alarm Switch":"3VA9988-0AB12","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":null,"sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=326923&mlfb=3VA1125-4EF32-0AF0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1125-4EF32-0AF0/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy 3VA1125-4EF32-0AF0 and get a price?","answer":"This part is sourced to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit a request and we'll provide a firm quote."},{"question":"What is the interrupting rating of 3VA1125-4EF32-0AF0 at 240 V?","answer":"At 240 V the interrupting rating is 121 kA. At 415 V it is 75.6 kA, at 440 V it is 52.5 kA, and at 500 V and 690 V it is 11.9 kA."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1125-4EF32-0AF0","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/3VA1125-4EF32-0AF0 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}}