Transient Voltage Suppressor (TVS) is a high-efficiency protection device in the form of diode. The function of TVS diode is that when the two poles are impacted by reverse transient high energy, it can change the high impedance between the two poles into low impedance at the speed of 10-12 second order, absorb the surge power up to several kilowatts, and make the voltage clamp between the two poles at a predetermined value, effectively protecting the precision components in electronic circuits from various surge pulses.