Motor Start Potential Relays

American ZETTLER’s ZCPR Series potential relays offer control solutions for  compressor motors. A wide selection of configurations are available with various  terminal and mounting combinations. These relays assist in the control of air  conditioning, heating or refrigeration system compressor motors which utilize  start capacitors.


  • 50A switching capability
  • UL approved Class B coil insulation system, 130°C rated construction material
  • SPST-NC configuration
  • Wide range of coil voltages: 168V-588V
  • Operation frequency: 50/60 Hz
  • Customizable Pick-up and Drop-out voltages
  • Variety of mounting positions
  • UL/CUR File SA 11095