The BZT52C51 with Zener Diodes SOD-123 RoHS is a unidirectional voltage regulator manufactured by Jingdao. It has optimum performance under wide temperature and operating voltage ranges. Its stable and reliable performance, low cost, small size, and low power consumption are also suitable for all kinds of environment. It is widely used in electronic circuits, like voltage supervision, voltage stabilization, over-voltage protection and noise reduction.