The TK15S04N1L from Toshiba is a MOSFET with Continous Drain Current 15 A, Drain Source Resistance 13.7 to 37 milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1.5 to 2.5 V. Tags: Surface Mount. More details for TK15S04N1L can be seen below.