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The 3-Series hard starts provide the service professional with an OEM option when the application calls for a hard start. Combining a potential relay and start capacitor the 3 series provides a TRUE 3 wire solution.


  • Includes EZ snap bracket for quick installation
  • Instant re-start
  • Mechanical Potential Relay
  • NATE® Recognized (Course #1867-0002)
  • True 3-wire solution
  • UL® Recognized
  • Voltage sensing
  • WARNING: Prop 65 info
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Capacitor Voltage: 330 VAC
Range (HP): 4 to 5 hp
Capacitor (MFD): 270 to 324 MFD
Operating Voltage: 208 to 277 VAC
Vmax @ 40°C: 375 VAC
Resistance +/- 10% at 25°C: 7500 ohms
Pick Up: 180-195 @ 25°C
Drop Out: 40-105 @ 25°C
Hard starting compressors
Low voltage situations
Use on any single phase air-conditioner or refrigeration unit
SDS Product Sheets Cross Reference Information
no entry 3W3_prd_001.pdf
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Manuals Application Sheets Software
no entry 3W3_app_001.pdf
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No Cross Reference Available

No Accessories Available

Can the hard start be mounted sideways?: No, hard starts should always be upright.
Where do I attach the (2) wires? (Always disconnect power before installation): Pick 'Downloads' tab. Select '3W3_prd_001.pdf' to download. Wiring diagrams are in the pdf file.