HEAT SINK TO-220/218 6.8°C/W; Packages Cooled:TO-218 TO-220 TO-247; Thermal Resistance:6.8°C/W; External Height - Metric:63mm; External Width - Metric:34.5mm; External Length - Metric:12.5mm; External Diameter - Metric:-; Heat Sink Material:Aluminium; External Height - Imperial:2.48"; External Width - Imperial:1.36"; External Length - Imperial:0.49"; External Diameter - Imperial:-; Product Range:-; SVHC:No SVHC (17-Dec-2015); Fixing Centres:25.4mm; Fixing Hole Diameter:2.6mm; Surface Finish:Black Anodised