MOTOROLA SEMICONDUCTOR TECHNICAL DATA Thyristors Silicon Controlled Rectifiers .
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designed primarily for half-wave ac control applications, such as motor controls, heating controls and power supply crowbar circuits.
Glass Passivated Junctions with Center Gate Fire for Greater Parameter Uniformity and Stability Small, Rugged, Thermowatt Constructed for Low Thermal Resistance, High Heat Dissipation and Durability Blocking Voltage to 800 Volts 300 A Surge