| 257 / | HD | ACTIVE SOLID-STATE DEVICES (E.G., TRANSISTORS, SOLID-STATE DIODES) |
| 107 | DF | REGENERATIVE TYPE SWITCHING DEVICE (E.G., SCR, COMFET, THYRISTOR) {19} |
| 119 | DF | .~ Bidirectional rectifier with control electrode (gate) (e.g., Triac) {9} |
| 126 | ![]() | .~.~ With means to separate a device into sections having different conductive polarity {1} |
| 127 | DF | .~.~.~> Guard ring or groove |