Fischer elektronik aluminium heat sink mount to 220 fischer elektronik sk 76 50 sa 220 the fischer elektronik aluminium heat sink mount bolt on 42cw to 220 has a bolt on component interface and do not have solder pins making them suitable for horizontal mounting on a pcb manufactured from alloy with a plate thickness of 4mm and a black anodised finish that increases radiative heat loss a choice of thermal resistances is available and the heatsinks are suitable for use with semi