The TK200F04N1L from Toshiba is a MOSFET with Continous Drain Current 200 A, Drain Source Resistance 0.78 to 1.37 milliohm, Drain Source Breakdown Voltage 40 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 3 V. Tags: Surface Mount. More details for TK200F04N1L can be seen below.