The TK4A80E from Toshiba is a MOSFET with Continous Drain Current 4 A, Drain Source Resistance 2800 to 3500 Milliohm, Drain Source Breakdown Voltage 800 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2.5 to 4 V. Tags: Through Hole. More details for TK4A80E can be seen below.