The BY255 is a 0.5A, 25V, single-phase, glass body, axial-lead, ultrafast glass-passivated rectifier diode manufactured by Taitron Components. It is capable of blocking voltages up to 25V and has a current rating of 0.5A. This diode is often used for general-purpose applications such as power supplies and automotive applications, and for high-speed switching. Its features include low-leakage current, low reverse recovery time, and high surge current capability.