The SI1912EDH-T1-E3 is an opto-isolator product from Vishay. It is an isolated TRIAC, with a Thyristor output, and a 6000 Vrms working isolation voltage. The product is optically coupled and is a shallow package type. It features a zero-crossing function, a high current transfer ratio, and a fast response time. This optocoupler is designed to reduce electrical noise and provide electrical insulation between circuits. It is suitable for use in a wide range of AC-driven applications, such as phase control, motor control, dimmers, and trigger circuits.