What is the reverse characteristic of the diode? — SUNMATE

When the applied reverse voltage does not exceed a certain range, the current passing through the diode is the reverse current formed by the drift movement of a few carriers.

Due to the small reverse current, the diode is in the off state. This reverse current is also called reverse saturation current or leakage current. The reverse saturation current of diode is greatly affected by temperature.

Generally, the reverse current of silicon tube is much smaller than that of germanium tube. The reverse saturation current of low-power silicon tube is in the order of nA, and that of low-power germanium tube is in the order of nA μ A Order of magnitude.

When the temperature rises, the semiconductor is thermally excited, the number of minority carriers increases, and the reverse saturation current also increases.