The F4-50R12KS4_B11 from Infineon Technologies is a IGBT with Gate Emitter Voltage -20 to 20 V, Saturated Collector Emitter Voltage 3.20 to 3.85 V, DC Collector Current 50 A, Peak Collector Current 100 A, DC Forward Current 50 A. More details for F4-50R12KS4_B11 can be seen below.