https://www.littelfuse.com/products/power-semiconductors-control-ics/thyristors-scr-triac/phase-control
Phase Control Thyristors | High-Power Solid State Switches
Capsule- and stud-type phase control thyristors serve as solid state switches in dc motor drives and power converters handling high voltages and current loads.
phase control thyristorshigh powersolid stateswitches