The NTE5554-I is a discrete semiconductor component known as a Silicon Controlled Rectifier (SCR). It features a voltage rating of 400V and a current rating of 10A, making it suitable for high-power applications. The SCR has a gate trigger current of 10mA and a holding current of 10mA, ensuring reliable operation. It is housed in a TO-220 package, which provides easy mounting and heat dissipation. The NTE5554-I is commonly used in power control and switching applications, such as motor control, lighting controls, and power supplies. Its high voltage and current ratings, along with its reliable performance, make it a popular choice for industrial and commercial electronic systems