The SP8K31HZG from ROHM Semiconductor is a MOSFET with Continous Drain Current -3.5 to 3.5 A, Drain Source Resistance 85 to 150 milliohm, Drain Source Breakdown Voltage 60 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 2.5 V. Tags: Surface Mount. More details for SP8K31HZG can be seen below.