Article 6: How to choose diode reverse withstand voltage? Avoid batch breakdown, leakage, and repair issues

90% of the batch failure problems of diodes are caused by insufficient reverse withstand voltage margin. Instantaneous surges, voltage peaks, and fluctuations in the mains can all cause diodes with insufficient voltage resistance to experience reverse breakdown, leakage, and short circuit failure.  diode

Universal pressure resistant selection criteria (must see for mass production):

1. Conventional civilian circuits: reserve 30% voltage margin;

2. Large electric power and industrial equipment: reserve more than 50% of the margin;

3. Inductive loads, relays, and motor circuits: It is necessary to increase the voltage resistance specifications to prevent reverse electromotive force breakdown.

Common Misconceptions:

The circuit is normally 12V, so choose a 20V voltage resistant diode directly. Once surges or voltage spikes occur, it is highly susceptible to batch failure. The correct approach is to choose higher voltage specifications such as 40V and 60V to enhance the stability of the entire machine. diode

Pressure resistant selection is the most fundamental and critical avoidance point for hardware mass production, and sufficient margin can significantly reduce the after-sales repair rate of products.