AAVID THERMALLOY TV4 Heat Sink, PCB, Board Level, TO-126, 21 C/W, 19 mm, 22 mm, 19 mm - Element14
HEAT SINK; Packages Cooled:SOT-32, TO-126; Thermal Resistance:21 C/W; External Height - Metric:19mm; External Width - Metric:22mm; External Length - Metric:19mm; External Diameter - Metric:-; Heat Sink Material:Aluminium ;RoHS Compliant: Yes - Newark