SUPCO Super Boot SPP8E  Electronic Relay/Start Capacitor Combination Hard Start Kit with electronic timing circuit

The Supco SPP8E is part of the E-Class Super Boost series, engineered to deliver a powerful torque surge for HVAC compressors that struggle to start under load. With its advanced electronic relay and high-capacity start capacitor, this 2-wire hard start kit is ideal for residential and light commercial systems operating in low-voltage or high-demand conditions.

Key Features

• Electronic Potential Relay (EPR) Technology — Offers faster, more accurate switching than mechanical relays
• High-Output Start Capacitor — 189–227 MFD at 330V for reliable compressor startup
• Built-In Safety Timer — Prevents rapid cycling and protects compressor windings
• Backup electronic timing circuit to protect the compressor
• Quick 2-Wire Installation — Pre-wired for fast, tool-free setup
• Universal Compatibility — Works with PSC and CSIR-type compressors from 1 to 3 HP
• UL Recognized & NATE Certified — Meets industry standards for safety and performance
• UL Recognized File E146162
• NATE Recognized (Course #1867-0002)

Applications:

• Use on any single phase air-conditioner or refrigeration unit
• Low voltage situations
• Hard starting compressors
• Central air conditioners and heat pumps with hard-starting compressors
• Systems with long refrigerant line sets or low voltage
• Units operating in high ambient temperatures or under heavy load
• Replacing failed OEM hard start kits with a more efficient electronic solution

Specifications:

• Recommended for 1 to 10 hp
• 170-277v
• Capacitor Value: 189-227F (MFD)
• Capacitor Voltage:  330 VAC

Replaces

• Supco SPP6, SPP7, and other standard hard start kits
• OEM hard start kits for 1–3 HP compressors requiring electronic relay control

*This product requires professional knowledge and skill to handle or install. All HVAC/R equipment should be installed/serviced by certified professionals only.