B05x0LW/B05x0W Schottky Barrier Rectifiers Taiwan Semiconductor B0520LW / B0530W / B0540W 0.5A surface-mount Schottky Barrier Rectifiers provide low power loss, high efficiency, and high conductance. The devices feature guard ring construction for transient protection. Taiwan Semiconductor SMD Schottky barrier rectifiers include B0520LW with 20Vrrm repetitive reverse voltage, B0530W with 30Vrrm, and B0540W with 40Vrrm.