The BT151S-800R is a sensitive gate thyristor (GTO) produced by WeEn semiconductor. It is an 800V, 650A bidirectional device, designed to deliver high breakdown voltage, low on-state voltage, high blocking voltage and low power losses. Features include UL approved, high blocking capability, long working life, and a negative temperature coefficient. It is often used in applications such as motor control, power supplies, and industrial automation.