Lennox Y8843 Supco SUPR Universal Potential Relay is a wire-to-wire electronic potential relay designed for reliable compressor starting in residential and light commercial HVAC systems. Manufactured by Supco, this universal potential relay uses advanced EPR technology to deliver consistent performance while protecting the compressor start winding if the motor fails to start.

Rated for single-phase systems up to 5 horsepower, the SUPR potential relay features normally closed 30-amp contacts and a built-in time function with instant restart capability. A safety time-out of approximately 1.0 to 1.5 seconds helps prevent damage during abnormal start conditions. The relay is non-positional, allowing flexible installation, and is UL recognized for quality and safety compliance.

This Lennox Y8843 relay is commonly used as an OEM or universal replacement for failed potential relays in air conditioners, heat pumps, and refrigeration equipment where dependable compressor starting and electrical protection are critical.

Product specifications
Brand: Supco
Catalog number: Y8843
Model / part number: SUPR
Type: Potential relay
Horsepower rating: Up to 5 HP
Amperage: 30 amps
Phase: 1 phase
Contacts: Normally closed
Technology: Electronic potential relay (EPR)
Maximum operating temperature: 194°F / 90°C
Warranty: 1 year
Gross weight: 0.29 lb