By applying a forward-biased voltage to this triac Z0103MA 2AL2 thyristor manufactured from STMicroelectronics the bistable switch will continue to stay on. This device has a surge current rating of 8.5 A. This SCR thyristor has an operating temperature range of -40 °C to 125 °C. Its repetitive peak forward blocking voltage is 600 V, while its repetitive peak reverse voltage is 600 V.