The FF400R12KT3 from Infineon Technologies is a IGBT with Gate Emitter Voltage -20 to 20 V, Saturated Collector Emitter Voltage 1.70 to 2.15 V, DC Collector Current 400 A, Peak Collector Current 800 A, DC Forward Current 400 A. More details for FF400R12KT3 can be seen below.