The RK12xx-600/800 series are 3-quadrant triacs featuring high current density due to double mesa technology, SIPOS, and glass passivation. They are suitable for phase control operation, light dimmers, motor speed control, and ON/OFF functions in applications such as static relays, general purpose AC switching, heating regulation, and induction motor starting circuits. These triacs are specially recommended for use with inductive loads. The RK12xxA variants offer internal isolation, providing a 2500V RMS isolation voltage from all three terminals to an external heatsink.
| Model | IGT Class (mA) | Voltage Rating (V) | Current Rating (A) | Package Type |
| RK12xx | 5, 10, 35, 50 | 600, 800 | 12 | TO-220A, TO-220B |
| RK12xxA | 5, 10, 35, 50 | 600, 800 | 12 | Isolated, D2PAK |
| RK1235A-600 | 5, 10, 35, 50 | 600 | 12 | D2PAK |