The SiHA21N80AEF from Vishay is a MOSFET with Continous Drain Current 7 A, Drain Source Resistance 220 to 250 Milliohm, Drain Source Breakdown Voltage 800 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2 to 4 V. Tags: Through Hole. More details for SiHA21N80AEF can be seen below.