SCR
FET
UJT
TRIAC
DIAC
20 Hz to 25 Hz
50 Hz to 60 Hz
5 kHz to 10 kHz
15 kHz to 1 MHz
30% - 40%
40% - 50%
50% - 60%
60% - 75%
Clipping
Clamping
Switching
Amplification