The product is an extremely low noise, high stability zener diode, suitable for power supply stabilization. The product has extremely low noise voltage (2.4V to 39V, 1/3 to 1/10 of conventional products), excellent rising performance (in the low current range), easy to select the optimal diode (due to its finely divided zener voltage ranks), guaranteed reliability equivalent to that of conventional products (Mini type package), allowing to reduce the mounting area, thickness and weight substantially compared with those of conventional products, allowing both reflow and flow mode of automatic soldering, allowing automatic mounting by an existing chip mounter.