{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA1225-4EF32-0AF0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA1225-4EF32-0AF0","canonicalUrl":"https://aoctrl.com/siemens/3VA1225-4EF32-0AF0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4EF32-0AF0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA1225-4EF32-0AF0, molded case circuit breaker, 3-pole, 250 A at 40 °C, TM240 thermal-magnetic release, 121 kA breaking capacity at 240 V.","salesMarkdown":"At 40 °C it carries 250 A continuous; the thermal derating curve drops to 223 A at 70 °C, which is the maximum operating ambient per the datasheet. The rated insulation voltage is 800 V, and the breaking capacity ranges from 121 kA at 240 V down to 11.9 kA at 690 V — so the voltage class of your distribution determines which interrupting rating applies. Above that it steps down: 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C. Maximum power loss is 57 W — that heat has to leave the enclosure, so factor it into the thermal budget for a sealed cabinet. ## Breaking capacity by system voltage The interrupting rating is voltage-dependent: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, 17 kA at 500 V, and 11.9 kA at 690 V. For a 480 V distribution system the relevant value is the 440 V or 500 V figure depending on the actual line-to-line voltage — use the next-higher voltage column if your system falls between the listed points. ## Physical fit and auxiliary switch complement Dimensions are 105 mm wide, 158 mm high, 70 mm deep.","metaTitle":"Siemens 3VA1225-4EF32-0AF0 SENTRON MCCB, 250 A, 3-Pole, TM24","metaDescription":"Siemens SENTRON 3VA1225-4EF32-0AF0 molded case circuit breaker, 250 A rated at 40 °C, 3-pole, TM240 thermal-magnetic release. Breaking capacity 121 kA at 240 V. Current production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":null,"categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"70 mm","Width":"105 mm","Height":"158 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":"17 kA","at 690 V":"11.9 kA","at 40 °C":"250 A","at 45 °C":"250 A","at 50 °C":"250 A","at 55 °C":"243 A","at 60 °C":"237 A","at 65 °C":"230 A","at 70 °C":"223 A","Depth [In]":"2.76 in","Width [In]":"4.13 in","Height [In]":"6.22 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":"57 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Of The Supplied Basic Switch":"3VA12254EF320AA0","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":"https://cdn.aoctrl.com/bc40c727675e59416c53b6a71d42fb12.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=568484&mlfb=3VA1225-4EF32-0AF0","alternativesUrl":"https://aoctrl.com/api/mcp/products/3VA1225-4EF32-0AF0/alternatives.json"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA1225-4EF32-0AF0 at 480 V?","answer":"The datasheet gives 52.5 kA at 440 V and 17 kA at 500 V. For a 480 V system, use the 500 V column as the conservative value — 17 kA — since 480 V exceeds 440 V."},{"question":"What does the TM240 release designation mean?","answer":"TM240 indicates a thermal-magnetic release with a continuous current rating of 250 A at 40 °C. The '240' refers to the frame size or release family; the actual amp rating is 250 A per the derating table."},{"question":"Where can I buy 3VA1225-4EF32-0AF0?","answer":"This part is sourced to order against an RFQ through independent distribution. Submit a request for quote; availability and current pricing are confirmed at quote time."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA1225-4EF32-0AF0","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/3VA1225-4EF32-0AF0 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}}