The GSIB640N from Vishay is a Power Diode with Forward Current 2.8 to 6.0 A, Forward Voltage 0.95 V, Reverse Current 0.01 to 0.25 mA, Repetitive Peak Reverse Voltage 400 V, Non-Repetitive Peak Forward Current 180 A. Tags: Through Hole. More details for GSIB640N can be seen below.