C1  -  Series DataSheet
C122F1G  -  Silicon Controlled Rectifiers SCRs 8 AMPERES RMS 50 thru 200 VOLTS  -  ON Semiconductor  -  Silicon Controlled Rectifiers

Designed primarily for full-wave ac control applications, such as motor controls, heating controls and power supplies; or wherever half−wave silicon gate−controlled, solid−state devices are needed.
Features
• Glass Passivated Junctions and Center Gate Fire for Greater Parameter Uniformity and Stability
• Small, Rugged, Thermowatt Construction for Low Thermal Resistance, High Heat Dissipation and Durability
• Blocking Voltage to 200 Volts
• Pb−Free Packages are Available*