The TK49N65W from Toshiba is a MOSFET with Continous Drain Current 49.2 A, Drain Source Resistance 48 to 55 Milliohm, Drain Source Breakdown Voltage 650 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 2.5 to 3.5 V. Tags: Through Hole. More details for TK49N65W can be seen below.