The 4MBI300VG-120R1-50 from Fuji Electric is a IGBT with Gate Emitter Voltage -20 to 20 V, Saturated Collector Emitter Voltage 1.85 to 2.4 V, DC Collector Current 300 to 600 A, Junction Temperature 175 Degree C, Gate Emitter Leakage Current 0.4 uA. More details for 4MBI300VG-120R1-50 can be seen below.