Manufacturer: Aavid Thermalloy  •  RoHS/pb-free: RoHS   Pb-free  •  Package Cooled: TO-5  •  Attachment Method: Press Fit  •  Outline: 12.70mm Dia  •  Height: 0.25" (6.35mm)  •  Material: Aluminum  •  Power Dissipation @ Temperature Rise: 0.6W @ 40°C  •  Thermal Resistance @ Forced Air Flow: 35°C/W @ 200 LFM  •  Thermal Resistance @ Natural: 63°C/W  •  Other PartNo: 2257, 320205B00000, HS253