PMMCON 100 Pcs 1N4733A 1N4733 1W 5.1V Zener Diode IR - reverse leakage current It refers to the leakage current generated by the zener diode under the specified reverse voltage. Zener diode, also known as Zener diode in English. By using the phenomenon that the current of the pn junction can change in a large range and the voltage is basically unchanged in the reverse breakdown state, the diode is made to stabilize the voltage. This diode is a semiconductor device with high resistance until the critical reverse breakdown voltage. At this critical breakdown point, the reverse resistance decreases to a small value. In this low resistance region, the current increases while the voltage remains constant. The voltage regulator diode is divided according to the breakdown voltage. Because of this characteristic, the voltage regulator is mainly used as a voltage regulator or voltage reference element. Zener diodes can be connected in series for use at a higher voltage, and a higher stable voltage can be obtained by connecting them in series.