The TK100S04N1L from Toshiba is a MOSFET with Continous Drain Current 100 A, Drain Source Resistance 1.9 to 4.5 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 TK100S04N1L can be seen below.