Excellent unidirectional switches for phase control applications such as heating and motor speed controls. Standard phase control SCRs are triggered with few milliamperes of current at less than 1.5V potential.
| Series | VDRM/VRRM (V) | IT(RMS) (A) | IGT (mA) | ITSM (A) | R(J-C) (C/W) |
| Sxx55x | 400 to 1000 | 55 | 40 | 550 (50Hz) / 650 (60Hz) | 0.5 (Sxx55R) / 0.53 (Sxx55N, Sxx55W, Sxx55M) |