Electronic Heat SinkTypically, these are heat sinks for high-power electronic components, operating without external power and cooling naturally. Most are made from aluminum alloy profiles, cut to the required size based on the component's dimensions, such as heat sinks for high-power switching tubes or transistors. Of course, in special cases, ultra-high-power electronic components may be equipped with cooling fans, such as the switching tubes in switching power supplies, which must be fitted with a cooling fan.