The 5SGA15F2502 from ABB is an Asymmetrical Gate Turn-Off Thyristor that has been designed to withstand effects due to cosmic radiation. It has a break-over voltage of up to 2500 V and a break-over current of less than 1500 A. This thyristor has a gate trigger voltage of 1.5 V and a gate trigger current of 1.5 A. It is based on patented free-floating silicon technology with an annular gate electrode construction and offers low on-state and switching losses. This gate turn-off thyristor is available in a disc package that measures 75 x 26 x 75 mm.