The FGH40T120SMD-F155 is a TO-247-3 IGBT (Insulated Gate Bipolar Transistor) manufactured by ON Semiconductor. This device is designed for use in power control applications and features a maximum junction temperature of 175°C with an operating temperature range of -55 to 150°C. This device is also RoHS compliant, meaning that it meets the requirements of the European Union Reduction of Hazardous Substances directive. It is rated with a maximum collector current of 40A, a collector-emitter voltage of 1200V, and a maximum gate-emitter voltage of 20V. The device features a thin, small outline package with a maximum power dissipation of 140W.