The TN2640 from Microchip Technology is a MOSFET with Continous Drain Current 0.22 to 0.5 A, Drain Source Resistance 3000 to 5000 milliohm, Drain Source Breakdown Voltage 400 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 0.8 to 2 V. Tags: Through Hole, Surface Mount. More details for TN2640 can be seen below.