Charge Coupled Bi-Directional Power MOSFET Relay - Circuits designed by David A. Johnson, P.E.
The circuit uses an inexpensive C-MOS inverter package and a few small capacitors to drive two power MOS transistors from a 12v to 15v supply. Since the coupling capacitor values used to drive the FETs are small, the leakage current from the power line into the control circuit is a tiny 4uA. Only about 1.5mA of DC is needed to turn on and off 400 watts of AC or DC power to a load.
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Date Added Sun Mar 11 2007
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Norcold 866 series service manual
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