The GT1003A from Goford Semiconductor is a MOSFET with Continous Drain Current 3 A, Drain Source Resistance 110 to 140 milliohm, Drain Source Breakdown Voltage 100 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 3 V. Tags: Surface Mount. More details for GT1003A can be seen below.