289-AB Heat sink TO-220, TO-218, TO-202.
Length: 0.710" (18.03mm)
Width: 1.000" (25.40mm)
Height off base (Height of Fin): 0.500" (12.70mm)
Power Dissipation @ Temperature: 2W @ 50°C
Thermal Resistance @ Forced Air Flow: 9.0°C/W @ 400 LFM
Thermal Resistance @ Natural: 25°C/W
Material Finish: Aluminum Black Anodized