Hi lijie, 

I did some asking around and unfortunately did not find external components that have been evaluated specifically with the ADM3053. I can point to the LTC2875 datasheet, section "Auxiliary Protection for IEC Surge, EFT and ESD" for general guidance…

Hi lijie, 

I would expect the protection components would not interfere with communication. But this list of protection components form the LTC2875 datasheet have not been tested with the ADM3053 transceiver. The two transceivers are different, and these…

That part number doesn't exist - do you mean:

ADM2587E 2.5 kV Signal and Power Isolated, ±15 kV ESD Protected, Full/Half Duplex RS-485 Transceiver (500kbps)

or