The CT404B-600S electronic part is a Thyristors – TRIACs TO-220BK Ma kes manufactured by Changjiang Electronics Technology Co., Ltd. This part is a three-terminal, bi-directional, semiconductor device designed to control the conduction of an ac current in an electrical circuit. It features a current rating of 600V, a gate current of 30mA, a gate-triggering voltage of 1.5V, and a high blocking voltage of 800V. The part is designed to ensure optimal temperature stability, low power loss, and long service life. It carries a RoHS certification, indicating the device is compliant with the RoHS directive on the reduction of hazardous substances in electronic components.