TVS diodes are also considered in secondary ESD protection schemes. It is important to determine the energy transfer across the windings so that a TVS diode can be suitably selected for the application. A TVS diode reference voltage will increase as current flow through it increases. While TVS diodes are a popular choice for voltage clamp protection, their capacitance in Ethernet applications can hinder performance. To overcome this problem for high-speed communication ports, TVS diodes are used within bridge diode networks as shown here. The trade-off with this arrangement is an increase of components. However, the lower capacitance bridge diode is in series with the much higher capacitance of the TVS diode, minimizing the added capacitance. The schematic shows two bridge diodes in series to further reduce the line capacitance and increase the protection voltage by the additional VF value.