I need to perform a current test that will apply a 40A, 6.25 ms current pulse every 5 seconds to a transformer. My first thought was to trigger a device that would deliver the current, but could be gated with the desired pulse. An SCR would be close, but it wants to stay "on" once gated. I need something that will shut off when the trigger finishes its 6.25 mS pulse. Any suggestions? Maybe there's a much easier way to do this.