Four Golden Rules for Diode Mass Production Selection to Eliminate Batch Failures and Rework

Based on years of experience in power supply and industrial control mass production, we have summarized universal diode selection principles applicable to all hardware projects, which can be directly used for new project reviews and existing project improvements.

1. High-frequency circuits prohibit the use of power-frequency rectifier tubes

In switching power supplies and high-frequency rectification scenarios, Schottky and fast recovery diodes must be used. Standard power frequency tubes suffer extreme high-frequency losses, inevitably leading to heat dissipation and failure.  diode

2. Adequate margin must be reserved for voltage and current

Reserve over 30% margin for civilian equipment and over 50% for industrial and vehicle-mounted equipment, prohibiting the selection of critical parameters.

3. Inductive loads must enhance their surge resistance capability

Relays, motors, and coil load circuits generate high back electromotive force, requiring the selection of high-voltage, high-avalanche-capacity diodes. diode

4. Scene matching takes precedence over parameter stacking

For low-voltage rectification, choose Schottky diodes; for high-voltage rectification, select fast-recovery diodes; for port protection, use TVS; for power-frequency rectification, opt for standard rectifier tubes. Proper scenario matching significantly enhances product stability.

Following the above selection criteria can significantly reduce batch failures related to diodes, enhancing product reliability and market reputation. diode