Supco 3w2 Wire Hard Start Kit 208-240V

Product Description

The SUPCO 3w2 is a 3-wire hard start kit designed to improve compressor starting torque in single-phase residential and light commercial refrigeration and air conditioning systems. It combines a potential relay and start capacitor into a single integrated kit, providing a complete true 3-wire solution for technicians who need a reliable hard start option in the field. Rated for 208-240 volts and compatible with compressors in the 3.5 to 4.5 horsepower range, the 3w2 is suited for HVAC/R service professionals performing compressor maintenance, system retrofits, or troubleshooting hard-start faults.

The SUPCO 3w2 is used in residential and light commercial air conditioning and refrigeration applications where the compressor struggles to start due to low voltage conditions, worn components, or high back pressure. The integrated relay-and-capacitor design makes it an OEM-style service replacement for systems that require a hard start assist. It is typically installed by licensed HVAC/R technicians during routine service calls or compressor replacements where starting torque needs to be increased.

Key Features

• True 3-wire design integrates potential relay and start capacitor in one kit
• Rated for 208-240 volts single-phase operation
• Compatible with compressors rated 3.5 to 4.5 horsepower
• OEM-style replacement for hard start applications
• Reduces compressor startup stress and extends equipment life

Compatibility

Designed as an OEM-style hard start replacement for single-phase air conditioning and refrigeration compressors rated 3.5 to 4.5 HP at 208-240 volts.

Installation Notes

Installation should be performed by a licensed HVAC/R technician. Disconnect and lock out all power to the unit before handling capacitors or relay wiring. Discharge any capacitors already present in the system before beginning work. Follow NEC guidelines and local codes when performing electrical service on refrigeration and air conditioning equipment.

Technical Specifications

• Voltage: 208-240 volts
• Horsepower Range: 3.5 to 4.5 HP
• Kit Type: 3-Wire Hard Start (Potential Relay and Start Capacitor)

Standard Information

• Brand: SUPCO
• Manufacturer Part Number: 3w2