The MTX585803RH8-0-T6-G from Cystech Electronics is a MOSFET with Continous Drain Current 12 to 57 A, Drain Source Resistance 5 to 11.5 milli-ohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 2.5 V. Tags: Surface Mount. More details for MTX585803RH8-0-T6-G can be seen below.