Transient Voltage Suppressor (TVS) Devices onsemi Transient Voltage Suppressor (TVS) devices are used to protect circuits from electrical overstress. This electrostatic stress can be caused by either Electro-Static Discharge (ESD), inductive load switching, or lighting. These TVS devices feature fast response time, low clamping voltage, low capacitance, and low leakage current that are ideal for transient surge suppression.