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“An objective in ESD protection design is to place the TVS as close to the source as possible, which helps to suppress any EMI entering the system as soon as possible. IF POE is used, the ESD protection should be between the magnetics and PHY so that the TVS is not being biased by the POE. In the case of tidu515a.pdf there is no POE, so placing the TVS near to the RJ45 connector is possible. ”
