This part is a kind of semiconductor called F10U20DN.

Function of this product has FFAF10U20DN.

Manufacturers : Fairchild Semiconductor

Image and pinout :

Some of the text within the PDF file :

FFAF10U20DN FFAF10U20DN Features • Ultrafast with soft recovery • Low forward voltage Applications • • • • Power switching circuits Output rectifiers Freewheeling diodes Switching mode power supply TO-220F TO-3PF 1 2 3 1. Anode 2.Cathode 3. Anode ULTRA FAST RECOVERY POWER RECTIFIER Absolute Maximum Ratings (per diode) TC=25°C unless otherwise noted Symbol VRRM IF(AV) IFSM TJ, TSTG Parameter Peak Repetitive Reverse Voltage Average Rectified Forward Current @ TC = 100°C Non-repetitive Peak Surge Current 60Hz Single Half-Sine Wave Operating Junction and Storage Temperature Value 200 10 100 - 65 to +150 Units V A A °C Thermal Characteristics Symbol RθJC Parameter Maximum Thermal Resistance, Junction to Case Value 4.0 Units °C/W Electrical Characteristics (per diode) TC=2 [ ... ]

F10U20DN PDF Datasheet Download