ESD Protection Diode Failure Modes and Usage Precautions

ESD protection diodes may experience failures during use, with the following common failure modes:

1. Suppression Circuit Failure: When an ESD protection diode is excessively activated or activated too rapidly, it may lead to suppression circuit failure, rendering it unable to protect the guarded component from electrostatic discharge.

2. Open Circuit: ESD protection diodes may fail due to over-activation or excessively rapid activation, resulting in an open circuit state. In this case, they become ineffective for protecting the component.

3. Short Circuit: Some ESD protection diodes may enter a short circuit state upon failure, imposing unnecessary stress on the protected component.

When using ESD protection diodes, the following precautions should be observed:

1. Ensure that the operational limits of the ESD protection diode are not exceeded, including maximum voltage, maximum current, and operating temperature.

2. Follow the correct pin layout, soldering, and mechanical installation guidelines to ensure stability and reliability.

3. If an ESD protection diode fails, it must be replaced immediately to maintain protective functionality.