What is the reverse breakdown voltage of the diode?

What is the reverse breakdown voltage of the diode?

The diode has forward and reverse directions, with a small forward r and a large reverse r. When applying voltage at both ends in the reverse direction, there will be current when the voltage is high. The maximum current it can withstand is very small, but if it is even higher, it will burn out, which is reverse breakdown.

The reverse breakdown voltage of a diode is generally 2-3 times the working voltage.

The voltage value of the diode during reverse breakdown. During breakdown, the reverse current increases sharply, and the unidirectional conductivity of the diode is destroyed, even overheating and burning out. The maximum reverse working voltage VBWM given in the manual is generally half of VBR.

When the applied reverse voltage exceeds a certain value, the reverse current will suddenly increase, which is called Electrical breakdown. The critical voltage that causes Electrical breakdown is called diode reverse breakdown voltage. When Electrical breakdown occurs, the diode loses unidirectional conductivity. If the diode is not overheated due to Electrical breakdown, the unidirectional conductivity may not be permanently damaged. After the external voltage is removed, its performance can still be recovered, otherwise the diode will be damaged. Therefore, excessive reverse voltage applied to the diode should be avoided during use.

Production environment

The phenomenon of reverse breakdown occurs in many situations, such as diodes, transistors, and so on. Taking a diode as an example: a diode is positively conductive. When a reverse voltage is applied to both ends of the diode, electrons cannot pass through the diode, making it equivalent to an open circuit. However, this open circuit depends on the voltage (i.e. reverse voltage) at both ends of the diode when the diode is connected in the opposite direction. If the reverse voltage is large enough, the diode is broken down (you can think of it as a wire), At this point, the reverse breakdown voltage is called the reverse breakdown voltage.