The MBR20100CT - 100V 20A Dual High Voltage Schottky Rectifier is a dual Schottky diode with common cathode in a To-220 Package for high current applications.
Each diode has a forward current of 10A, hence the IC can push up to 20A through it with a peak reverse voltage of 100V.
The MBR20100 is a rectifier dual diode that is commonly used in Converter circuits.