MBS4991 Diode Thyristors . . . designed for full-wave triggering in Triac phase control circuits, half-wave SCR triggering application and as voltage level detectors. Supplied in an inexpensive plastic TO-226AA package for high-volume requirements, this low-cost plastic package is readily adaptable for use in automatic insertion equipment. • Low Switching Voltage — 8 Volts Typical • Uniform Characteristics in Each Direction • Low On-State Voltage — 1.7 Volts Maximum • Low Off-State Current — 0.1 mA Maximum • Low Temperature Coefficient — 0.02 %/°C Typical