The 2MBI1800XXF170-50 from Fuji Electric is a IGBT with Gate Emitter Voltage -20 to 20 V, Saturated Collector Emitter Voltage 1.7 to 2.2 V, DC Collector Current 1800 A, Peak Collector Current 3600 A, DC Forward Current 1800 A. More details for 2MBI1800XXF170-50 can be seen below.