The SHD231008 from Sensitron Semiconductor is a MOSFET with Continous Drain Current 300 mA, Drain Source Resistance 6 ohm, Drain Source Breakdown Voltage 250 V, Gate Source Voltage -20 to 20 V, Switching Speed 20 to 40 ns. Tags: Surface Mount. More details for SHD231008 can be seen below.