Supco MPR5 Ultra Start Hard Start Kit Mechanical Potential Relay & Start Capacitor 1-3 HP

The Supco MPR5 Ultra Start Series Hard Start Kit is a complete hard start solution combining a mechanical potential relay (MPR) and a start capacitor in a single package. Designed for HVAC/R applications, this kit dramatically reduces the amp draw and mechanical stress on compressors during startup — the most demanding moment in any compressor's operating cycle.

Key Features:

• Simple 2-Wire Installation — Easy connection with no additional wiring complexity
• Voltage-Sensing Mechanical Potential Relay — Automatically senses motor back-EMF to disengage the start capacitor at the correct moment
• Instant Re-Start Capability — Allows the compressor to restart immediately without a time-delay
• Compatible with PSC and CSIR Type Compressors — Also suitable for reciprocating, scroll, and rotary compressors
• OEM Approved Technology — Meets Original Equipment Manufacturer requirements for reliability and fit
• NATE® Recognized — Course #1867-0002; accepted by the North American Technician Excellence program
• UL® Recognized — Meets UL standard E146162
• Includes EZ Clamp Bracket for convenient mounting

Specifications:

• Capacitor Range: 189–227 MFD
• Capacitor Voltage: 330 VAC
• Operating Voltage: 208–277 VAC
• Horsepower Range: 1 to 3 HP
• Contact Rating: 35 Amps
• Phase: Single Phase, 60 Hz
• Temperature Rating: -67°F to 185°F

The Supco MPR5 is part of the trusted Ultra Start series, engineered to extend compressor life and improve startup torque in residential and light commercial HVAC and refrigeration systems. Two-year warranty included.