Transient Voltage Suppression Diode (TVS) is an electronic component used to protect electronic devices from transient voltage surges. It is designed to suppress transient overvoltage, such as voltage spikes, surges, electromagnetic interference, etc., to protect sensitive circuits and devices from damage.

TVS diodes have the following main characteristics:

1. High response speed: TVS diodes can respond to transient overvoltage in nanosecond time, quickly guiding the overvoltage to ground or other safe levels, thereby protecting the protected equipment.

2. Low voltage discharge: TVS diodes have high resistance under normal operating conditions and will not have a significant impact on normal operating voltage. But when it exceeds its rated voltage, it will quickly become a low resistance state, directing transient overvoltage to ground.

3. High energy absorption capacity: TVS diodes can absorb a large amount of energy to protect the protected equipment from overvoltage damage. It can withstand high current and energy shocks, thereby protecting other electronic components.

4. Reusable: TVS diodes can respond and absorb transient overvoltage multiple times, and have the characteristic of being reusable. It can provide protection again after returning to normal working condition.

TVS diodes are widely used in electronic devices, especially in communication equipment, computers, power supply, industrial control and other fields. They are often used to protect sensitive semiconductor devices (such as integrated circuits, diodes, transistors, etc.) from voltage spikes and surges, preventing equipment damage and data loss.