The MTN12N30J3-0-T3-G from Cystech Electronics is a MOSFET with Continous Drain Current 2 to 11 A, Drain Source Resistance 250 to 330 milli-ohm, Drain Source Breakdown Voltage 300 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 2 to 4.5 V. Tags: Surface Mount. More details for MTN12N30J3-0-T3-G can be seen below.