The 4MBI450VB-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 450 to 900 A, Junction Temperature 150 Degree C, Gate Emitter Leakage Current 1.2 uA. More details for 4MBI450VB-120R1-50 can be seen below.