Aavid thermalloy bw50 2 5 9 c w clip on heat sink for to 218 to 247 aavid thermalloy bw50 2 a compact extruded clip on heat sink suitable for use with to 218 or to 247 type components aavid thermalloy bw50 2 heat sink for to218 to247 and to220 5 9 c w clip