The TK5A90E from Toshiba is a MOSFET with Continous Drain Current 4.5 A, Drain Source Resistance 2500 to 3100 Milliohm, Drain Source Breakdown Voltage 900 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2.5 to 4 V. Tags: Through Hole. More details for TK5A90E can be seen below.