The TK5P53D from Toshiba is a MOSFET with Continous Drain Current 5 A, Drain Source Resistance 1200 to 1500 Milliohm, Drain Source Breakdown Voltage 525 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2.4 to 4.4 V. Tags: Surface Mount. More details for TK5P53D can be seen below.