HEAT SINK TO-220 4.5°C/W; Packages Cooled:TO-220; Thermal Resistance:11°C/W; External Height - Metric:38.1mm; External Width - Metric:34.9mm; External Length - Metric:12.7mm; External Diameter - Metric:-; Heat Sink Material:Aluminium; External Height - Imperial:1.5"; External Width - Imperial:1.37"; External Length - Imperial:0.5"; External Diameter - Imperial:-; Product Range:-; SVHC:No SVHC (17-Dec-2015); Fixing Centres:25.4mm; Force Cooled Thermal Resistance:5.5°C/W; Surface Finish:Black Anodised