Supco SPP8E Hard Start Kit 90 to 277 Volts

Product Description

The SUPCO SPP8E is an E Class hard start kit designed to reduce locked-rotor amperage and improve compressor startup performance in single-phase refrigeration and air conditioning systems. Hard start kits add start capacitance and a positive temperature coefficient (PTC) relay in one assembly, allowing compressors to start under high head pressure or low voltage conditions. The SPP8E operates across a wide input voltage range of 90 to 277 volts, making it adaptable to a broad range of residential and light commercial equipment. It weighs 4 pounds and features copper construction for reliable electrical contact.

The SPP8E is used in residential and light commercial HVAC and refrigeration applications where compressors exhibit hard-starting symptoms, trip on thermal overload, or fail to start under high head pressure. It is well suited for retrofit installations on hermetic and semi-hermetic compressors. HVAC technicians and refrigeration service professionals typically install this component during compressor service or as a low-cost diagnostic step before compressor replacement.

Key Features

• Wide operating voltage range: 90 to 277 volts accommodates diverse equipment
• E Class hard start rating for reliable high-torque compressor startup assistance
• Copper construction for durable, low-resistance electrical connections
• Integrated PTC relay and start capacitor in a single compact assembly
• Retrofit-friendly design for use on existing hermetic compressor installations

Compatibility

Designed as an OEM-style hard start retrofit for single-phase hermetic compressors in residential and light commercial refrigeration and air conditioning systems operating between 90 and 277 volts.

Installation Notes

Installation should be performed by a licensed HVAC or refrigeration technician. Disconnect and lock out all power to the unit before servicing the compressor circuit. Discharge any run or start capacitors already present in the circuit before handling. Follow all applicable NEC requirements for low-voltage motor circuits when routing and connecting wiring.