Incredibly fast-switching, GaN device characterization

[@reymer101]

hello, i am starting to learn about electronics because i need to make an EDM device and i need to know. which element or dispositive could help me to switch on and off the spark? i think that at 1khz would be good as far as i have research transistors can work as a switch the EDM dispositive would work at 12v and 30amps DC, can you help me with that please