The GD400SGU120C2S 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 549 A, Junction Temperature 150 Degree C, Gate Emitter Leakage Current 0.4 uA. More details for GD400SGU120C2S can be seen below.