The 4MBI900VB-120RA-50 from Fuji Electric is a IGBT with Gate Emitter Voltage -20 to 20 V, Saturated Collector Emitter Voltage 1.85 to 2.45 V, DC Collector Current 900 to 1800 A, Junction Temperature 150 Degree C, Gate Emitter Leakage Current 1.2 uA. More details for 4MBI900VB-120RA-50 can be seen below.