The FD300R12KS4_B5 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 300 A, Peak Collector Current 600 A, DC Forward Current 300 A. More details for FD300R12KS4_B5 can be seen below.