Fischer Elektronik Heat Sinks for TO-3/TO-55/SOT-9/SOT-32/TO-220 – Fischer Elektronik FK 202 SA-CB, The Fischer Elektronik 12.7mm 8° Heat Sink is a finger shaped heatsink with combi punching, designed to a high standard and ideal for power semiconductors. Fischer Elektronik FK 202 SA-CB 8°C/W Heat Sink TO3, TO55, SOT-9, SOT-32 TO220