ESD Protection Diode Failure Modes and Precautions for Use
Products Description
The ESD (Electrical Suppression Diodes) protection diode is a semiconductor device used in a circuit to suppress electrostatic induction and transient overvoltage. ESD Protection Diode is an electronic component to prevent damage caused by lightning strikes, electrostatic discharge,s or arcs of electronic components. It has the characteristics of small size, lightweight, stable performance, and so on, and is widely used in computer systems, communication equipment, and industrial control equipment.
Operating Principle
ESD refers to the insulation failure of electronic equipment, that is, the damage accident caused by electrical reasons. Usually, lightning or other forms of electromagnetic interference causes damage to the internal components of the electronic equipment, resulting in the electronic equipment can not work normally. This type of failure is called an electric shock-type fault. When the electric shock phenomenon occurs, the power cord and the ground wire will produce an instantaneous high potential difference and lead to the abnormal electrification of the equipment shell. Therefore, in order to ensure personal safety, the surge-in-storage device must be installed to prevent such incidents.
Failure Mode
The ESD protection diode may fail during use. The common failure modes are mainly the following:
1. Inhibition circuit failure: When the ESD protection diode is overactivated or over rapidly activated, it may cause the inhibitory circuit to fail, thus failing to protect the protected parts from electrostatic discharge.
2. Open circuit: The ESD protection diode may fail due to excessive activation or excessively rapid activation, resulting in an open circuit state, when it will have no effect on the protected parts.
3. Short circuit: part of the ESD protection diode may appear short circuit when failure, which will cause it to cause unnecessary burden to the protected parts.
When using ESD, note the following:
1. Ensure that the use limit of the ESD protection diode is not exceeded, including the maximum voltage, maximum current, and operating temperature.
2. It should be used in accordance with the correct pin layout, welding, and mechanical installation guidelines to ensure stability and reliability.
3. When the ESD protection diode fails, it must be replaced immediately to maintain the protection.
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