The STGW40M120DF3 from STMicroelectronics is a IGBT with Gate Emitter Voltage -20 to 20 V, Saturated Collector Emitter Voltage 1.85 V, DC Collector Current 40 to 80 A, DC Forward Current 40 to 80 A, Junction Temperature -55 to 175 Degree C. More details for STGW40M120DF3 can be seen below.