The TK3P50D from Toshiba is a MOSFET with Continous Drain Current 3 A, Drain Source Resistance 2300 to 3000 Milliohm, Drain Source Breakdown Voltage 500 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2.4 to 4.4 V. Tags: Surface Mount. More details for TK3P50D can be seen below.