The GD300HFU120C6S from StarPower is a IGBT with Gate Emitter Voltage -20 to 20 V, Saturated Collector Emitter Voltage 2.9 to 3.6 V, DC Collector Current 397 A, Junction Temperature 150 Degree C, Gate Emitter Leakage Current 0.4 uA. More details for GD300HFU120C6S can be seen below.