The TK49N65W5 from Toshiba is a MOSFET with Continous Drain Current 49.2 A, Drain Source Resistance 51 to 57 Milliohm, Drain Source Breakdown Voltage 650 V, Gate Source Voltage -30 to 30 V, Gate Source Threshold Voltage 3 to 4.5 V. Tags: Through Hole. More details for TK49N65W5 can be seen below.