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Hard Start Kit Mechanical Potential Relay (MPR) and Start Capacitor, for use on 3.5 to 5 HP units


  • Mechanical Potential Relay
  • Easy 2-wire installation
  • NATE® Recognized (Course #1867-0002)
  • Voltage sensing
  • Instant re-start
  • OEM approved technology
  • Can be used on PSC and CSIR type compressors
  • 330 VAC capacitor
  • UL® Recognized
  • WARNING: This product can expose you to chemicals including Cadmium and Cadmium compounds, which are known to the State of California to cause cancer and birth defects or other developmental harm. For more information, go to
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Operating Voltage: 208 to 277 VAC
Recommended Range (HP): 3.5 to 5HP
Capacitor Size (MFD): 270 to 324MFD
Hard Starting Compressors
Low Voltage Situations
Single Phase HVAC Compressors

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Replacement Part:KS-1
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