What is the reverse breakdown voltage of the diode? — SUNMATE

What is the reverse breakdown voltage of the diode?

Diodes are forward and reverse. The forward r is very small and the reverse r is very large. When the voltage is high, there will be current. The maximum current that the diode can withstand is very small. If the voltage is higher, it will burn out, i.e. reverse breakdown.

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

Voltage value of diode during reverse breakdown. When breakdown occurs, the reverse current increases sharply, and the unidirectional conductivity of the diode is destroyed, even burnt out due to overheating. The maximum reverse operating voltage VBWM given in the manual is usually half of VBR.

When the applied reverse voltage exceeds a certain value, the reverse current will suddenly increase, which is called breakdown. The critical voltage causing breakdown is called diode reverse breakdown voltage. Diodes lose unidirectional conductivity during electrical breakdown. If the diode is not overheated due to breakdown, the unidirectional conductivity may not be permanently damaged. After removing the external voltage, its performance can still be recovered, otherwise the diode will be damaged. Therefore, reverse voltage applied to diode shall be avoided during use.

Power generation environment

Reverse breakdown occurs in many cases, such as diode, triode, etc. Take diode as an example: diode conducts electricity in a positive direction. When a reverse voltage is applied at both ends of the diode, electrons cannot pass through the diode, making the diode equivalent to an open circuit. However, when the diodes are connected in reverse, the open circuit depends on the voltage across the diodes (i.e., the reverse voltage). If the reverse voltage is large enough, the diode will be broken down (you can think of it as a wire). At this time, the reverse breakdown voltage is called reverse breakdown.