So, DSLR camera flashes sometimes tout that they are “Thyristor triggered.” What exactly is a Thyristor? Basically, it is a solid-state circuit that is similar to a transistor, but it only acts as an on-off switch. There is no mode in between where it can act as an amplifier for an analaog signal. Also, they are more rugged for larger voltage swings than transistors and MOSFETs.
20181101/https://en.wikipedia.org/wiki/Thyristor