Can EFT and surge protection devices be shared in data center switches?

The significant differences in spectrum and energy between EFT and surge in data center switches mean that protection devices cannot be simply shared: surges are high-energy long pulses (1.2/50μs) requiring varistors or high-power TVS for absorption; EFTs are low-energy high-frequency pulses (5/50ns) requiring common-mode inductors and capacitors for filtering. A proper collaborative architecture is as follows: A 14D561K varistor (4.5kA current-carrying capacity) is connected in parallel at the power port to handle surges, and a CMZ7060A-701T common-mode inductor is connected in series to handle EFTs; a 3R090L-6X8 GDT (5kA) is connected in parallel at the signal port to handle surges, and a PBZ1608A-102Z0T ferrite bead (1000Ω) is connected in series to handle EFTs; a shared grounding terminal is used, but the circuit must be independent. Actual measurements show that this shared approach reduces the risk of protection failure by 90%.