The IRF620 from Vishay is a MOSFET with Continous Drain Current 3.3 to 5.2 A, Drain Source Resistance 0.80 milliohm, Drain Source Breakdown Voltage 200 V, Gate Source Voltage 20 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Through Hole. More details for IRF620 can be seen below.