The SiHG21N65EF from Vishay is a MOSFET with Continous Drain Current 21 A, Drain Source Resistance 150 to 180 Milliohm, Drain Source Breakdown Voltage 650 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Through Hole. More details for SiHG21N65EF can be seen below.