Respectively featuring DC coil that eliminates buzzing during operation and standard AC coil, PD52DCS and PD52ACS can protect electronics from damaging power surges, open neutral, and reverse polarity. Both switches incorporate over voltage surge protection of 3,300 J at 103,000 A. While 2 green LEDs indicate generator power or AC power availability, 2 separate red LEDs display need for service regarding shore power section to indicate destructive power surge.