In the practical application circuit, the damage of the instantaneous pulse to the device can not be ignored. How to protect the precision components of the back-end circuit from transient pulses? This requires the use of a transient voltage suppressor (also known as a transient suppressor diode, TVS, TVS diode) to connect the TVS in parallel with a protected line on the board. When the instantaneous voltage exceeds the operating voltage in the circuit, the TVS avalanche breaks down, giving the instantaneous current a low impedance path. After the instantaneous pulse is over, TVS automatically returns to the high resistance state, and the entire circuit returns to the normal voltage state.