Hi Easy peasy
Recently my customer told me that even though the power supply claims to be compliant to surge and EFT, still it is mandatory to provide basic protection for the DC line connected to load.
In that case, I am not sure where to begin, because I do not know what voltage level will be let through by the power supply and what current levels to assume. My load is FPGA and other bunch of ADC/DAC/op-amps etc. How to calculate the impedance of my circuit and estimate the peak current?