PD52DCSD 240 VAC 50-Amp Automatic Surge Protected Transfer Switch – “The Silent ATS”


Now you can protect your expensive RV electronics from damaging power surges, open neutral and reverse polarity. The new PD52DCSD is provided with a DC coil that eliminates the annoying buzzing during operation. The unit incorporates over voltage surge protection of 3300 Joules at 103,000 Amps — the highest in the industry!



Features two green LED indicators on a  cable connected Remote.  Providing  quick and easy indication of generator power or AC power availability. A red LED indicator, when “ON”, display the need for service required for the shore power section, indicating there has been a destructive power surge!


  • Time delay circuit board ensures generator voltage is at a stable level before transfer occurs.
  • Rugged, heavy duty, screw type wiring terminals ready to wire to contactor base. Ensure ease of wiring and prevents
    wiring errors.
  • Easy to remove protective cover with wiring schematic inside.
  • Metal enclosure for extra safety.
  • Remote panel shows status.
  • AC Detect option available for auto generator start compatibility.
  • 70 Amp neutral rating.
  • 2 year limited warranty.



  • Voltage: 240 VAC (50 Amp RV Service)
  • Amps: 50 Amps
  • Metal Box Dimensions: 10.25″ L x 8.25″ W x 5.5″ H
  • Metal Box: 9.8 lbs.


View the PD52DCS/PD52S Series Owners Manual (PDF)