The TC1550 from Microchip Technology is a MOSFET with Continous Drain Current -0.24 to 0.35 A, Drain Source Resistance 40000 to 125000 milliohm, Drain Source Breakdown Voltage -500 to 500 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage -4.5 to 4 V. Tags: Surface Mount. More details for TC1550 can be seen below.