The Unico 306-567.4 Firing Card Module Assembly provides SCR/thyristor trigger control for industrial power conversion equipment, delivering precise firing signals to regulate power delivery. This internal replacement circuit board carries Board Number 9412, Serial Number 3006117, and Hardware Revision 21-D-32, and is used in DC drives, rectifiers, power supplies, and other industrial motor-control systems. Maintenance teams, OEMs, and electrical technicians rely on it for equipment replacement and preventive maintenance to restore reliable SCR firing performance. Common replacements include Unico 306-567 Firing Card, Unico SCR Firing Card, and Unico Power Control Board.
