How to pair TVS devices with CS protection for data center switches?

Data center switch conducted interference immunity (CS) protection primarily relies on filtering, supplemented by TVS (Transient Voltage Suppressor). TVS is mainly used to suppress residual transients from incomplete isolation in coupled/decoupled CDN networks. Proper matching: The CS injection frequency band of 0.15MHz-80MHz is in the low-frequency range, where the effect of TVS junction capacitance is negligible. Use a YENTE SMBJ15A (VRWM=15V, junction capacitance 600pF) connected in parallel to the power input. However, TVS should be used cautiously on signal line CS, as large-capacitor TVS will attenuate the signal; ferrite bead filtering should be preferred. A 22Ω resistor should be connected in series between the TVS and the signal line to isolate the capacitive load. Actual measurements show that a TVS at the power port can reduce voltage spikes during CS injection by 35%, and it passes a 10V test when used with a common-mode inductor.