Boyd 0S509-140-U
HEAT SINK MAX CLIP - STANDARD 140MM; Thermal Resistance:1.21°C/W; Packages Cooled:TO-218, TO-220, TO-251, TO-262, TO-273; External Width - Metric:73.54mm; External Height - Metric:60mm; External Length - Metric:140mm; External Diameter - Metric:-; Heat Sink Material:-; External Width - Imperial:2.