The 1MBI300HH-120L-50 from Fuji Electric is a IGBT with Gate Emitter Voltage -20 to 20 V, Saturated Collector Emitter Voltage 3.2 to 4.35 V, DC Collector Current 450 to 900 A, DC Forward Current 300 to 600 A, Junction Temperature 150 Degree C. More details for 1MBI300HH-120L-50 can be seen below.