Transient voltage suppressor (TVS) is a kind of high performance protection device in the form of diode. When the poles of the TVS diode are subjected to reverse transient high energy impact, it can change the high impedance between the poles into low impedance at a speed of 10-12 seconds, absorb up to several kilowatts of surge power, so that the voltage clamp between the poles is located at a predetermined value, effectively protecting the precision components in the electronic circuit from damage by various surge pulses.

Three characteristics of transient voltage suppressor:

1, the transient suppression diode added to the signal and power line, can prevent the microprocessor or MCU due to instantaneous pulse, such as electrostatic discharge effect, AC power surge and switching power supply noise caused by failure.

2, electrostatic discharge effect can release more than 10000V, more than 60A pulse, and can last 10ms; The general TTL device, when encountered more than 30ms of 10V pulse, will lead to damage. With TVS diodes, the pulse that can cause device damage can be effectively absorbed and interference caused by switching between buses can be eliminated (Crosstalk).

3, the TVS diode is placed in the signal line and ground, can avoid the data and control bus by unnecessary noise.