Electronic radiatorTypically, heat sinks for high-power electronic components, without external power, cooled by natural convection. Most are made from aluminum alloy profiles, cut to the required size based on the component size, such as heat sinks for high-power switching tubes or transistors. Of course, in special cases, ultra-high-power electronic components may also come with cooling fans, such as the switching tubes in switch-mode power supplies, which must be equipped with a cooling fan.