I have a product that uses RS232 or RS482 and wanted to add better circuit protection for lightning strikes n an upcoming release. Right now, all I have is a MOV on the RS232 line. I wanted to see what everyone else would recommend. I don't need a perfect circuit protector, just looking for better ideas. I figured I would ask the community how they protect their circuits other than buying someone's product to do it. I had a vendor recommend resettable fuses as one option, but not sure if that is the best way to go. We often have lightning strikes and overall our products hold up well, with usually just the max232 or SN65176 being killed.

Thanks
David