The US5U30 from ROHM Semiconductor is a MOSFET with Continous Drain Current -1 to 1 A, Drain Source Resistance 280 to 800 milliohm, Drain Source Breakdown Voltage -20 V, Gate Source Voltage -12 to 12 V, Gate Source Threshold Voltage -2 to -0.7 V. Tags: Surface Mount. More details for US5U30 can be seen below.