Small Signal Schottky Barrier Diodes Toshiba Small Signal Schottky Barrier Diodes come in a variety of packages, voltages, and current ratings to meet a variety of design requirements. Voltages range from 10V to 60V with current ratings from 0.05A to 2A. Toshiba Small Signal Schottky Barrier Diodes feature high-speed switching and a low leakage current.