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MOTOROLA Order this document SEMICONDUCTOR TECHNICAL DATA by MCR218/D MCR218 Thyristors Series Silicon-Controlled Rectifiers . . . designed primarily for half-wave ac control applications, such as motor controls, heating controls and power supplies; or wherever half-wave silicon gate-controlled, SCRs solid-state devices are needed. 8 AMPERES RMS • Glass-Passivated Junctions 50 thru 800 VOLTS • Blocking Voltage to 800 Volts • TO-220 Construction — Low Thermal Resistance, High Heat Dissipation and Durability G A K CASE 221A-04 (TO-220AB) STYLE 3 MAXIMUM RATINGS (TJ = 25°C unless otherwise noted.) Rating Symbol Value Unit Peak Repetitive Forward and Reverse Voltage(1) VDRM Volts (TJ = 25 to 125°C, Gate Open) MCR218-2 VRRM 50 MCR218-3 100 MCR218-4 200 MCR218-6 400