TO-220 HeatsinkLow-cost heatsink for TO-220 packages.Package CooledTO-220Attachment MethodBolt OnShapeRectangleLength0.750" (19.05mm)Width0.500" (12.70mm)Diameter-Height Off Base (Height of Fin)0.380" (9.65mm)Thermal Resistance @ Natural25.9°C/WMaterialAluminumMaterial FinishBlack Anodized