The breakdown voltage is a characteristic of a diode and should always be known. The operation should be in the range of this tension should be avoided. He is depending on the interpretation of the between-50V diode through -1000 V for normal semiconductor diodes, Schottky diodes in the range of-20V to -200 V.



Zener have a breakthrough voltage of up to 5V. Here is the breakthrough used, because after the breakthrough comes from the resistance.