The GD300HFK120C2S from StarPower is a IGBT with Gate Emitter Voltage -20 to 20 V, Saturated Collector Emitter Voltage 2.15 to 2.65 V, DC Collector Current 510 A, Junction Temperature 150 Degree C, Gate Emitter Leakage Current 0.4 uA. More details for GD300HFK120C2S can be seen below.