The G30 from Goford Semiconductor is a MOSFET with Continous Drain Current 28 A, Drain Source Resistance 5 to 8.7 milliohm, Drain Source Breakdown Voltage 20 V, Gate Source Voltage -12 to 12 V, Gate Source Threshold Voltage 0.5 to 0.9 V. Tags: Surface Mount. More details for G30 can be seen below.