BT138-800G,127 is a NXP 400V 8A Triac Sensitive Gate from the BT138 Series SCR / Thyristor Switching Module. It is a triac-based power switch with a high sensitivity gate current and high trigger current capability. It provides a low leakage current and volt-time characteristics allowing for fast and accurate switching. The BT138-800G,127 is ideal for use in applications such as motor speed control, lighting control, general ON-OFF applications, and heating control. It features an isolated tab mounting technology, making it easy to mount anywhere. The BT138-800G,127 has an on-state voltage of 680V and upto 5A of gate drive current. It also has a very low holding current of 5mA and an off-state current of 2A.