The GSIB2040N from Vishay is a Power Diode with Forward Current 3.5 to 20 A, Forward Voltage 1.0 V, Reverse Current 0.01 to 0.25 mA, Repetitive Peak Reverse Voltage 400 V, Non-Repetitive Peak Forward Current 240 A. Tags: Through Hole. More details for GSIB2040N can be seen below.