The NTE5411 is a 30V, 4A, 0.2mA Thyristor made by NTE in a TO126 package. It is a four-layer, unipolar Thyristor designed for AC power switching and phase control applications. It features high surge current capability, fast switching speed, and high di/dt capability. The functionality of the NTE5411 is provided by a pair of three-pin controls. When a control signal is applied to the gate, a surge of current is triggered, causing the Thyristor to switch on. When the voltage on the gate is removed, the Thyristor switches off.