1, ESD protection component itself parasitic capacitance must be less than 0.3pF, it will not affect the transmission rate of USB3.0 up to 4.8Gbps.
2, the protection of the components of the ESD tolerance must be high enough, at least to be able to withstand the 61000-4-2 IEC contact mode ESD 8kV attacks.
3, in the ESD event during protection components must provide enough low voltage clamp can not be caused by data transmission errors or omissions, or even cause damage to the internal circuit of system products.
4, a protective component action after the turn-on resistance must be low enough, so that not only can reduce the voltage clamp, the biggest advantage is can make component to keep low voltage clamping of the attacked by high energy ESD, to avoid appeared protection component is not damaged but the internal circuit of the system has no work normally or even damage.
5, using a single chip solution USB 3 ESD connection protection requirements of all signal line / port power line, especially in the use of the MicroUSB interface, which will greatly reduce the complexity of the layout design.
The above five elements are indispensable requirements, if any one is not satisfied, then USB 3 port cannot be perfect protection. But at the same time, in accordance with the above five requirements are quite high ESD protection component of its own design difficulty, the design team with rich experience and solid technology to achieve.