The GP3139 from JSMicro Semiconductor is a MOSFET with Continous Drain Current -0.8 A, Drain Source Resistance 290 to 495 milli-ohm, Drain Source Breakdown Voltage -20 V, Gate Source Voltage -12 to 12 V, Gate Source Threshold Voltage -0.35 to -1.0 V. Tags: Surface Mount. More details for GP3139 can be seen below.