The MBR1045 part is a rectifier diode made by the company Vishay Semiconductor, specifically the Vishay Semiconductor brand of Schottky diodes. It is a single phase 10A 45V Schottky Barrier Rectifier. It has a forward drop of 450mV at 10A, and reverse leakage current of 100nA at 25°C. It is suitable for use in high frequency rectification, freewheeling and clamping applications, and is ideal for use in telecommunication, computer, and other high-speed switching applications.