Supco UPRO21 Universal Push-on Relay Compressor

Product Description

The SUPCO UPRO21 is a universal push-on relay designed for use in refrigeration and air conditioning compressor circuits. This relay mounts directly onto the compressor start terminal without tools, making field replacement straightforward for HVAC and refrigeration technicians. Constructed with copper contacts, the UPRO21 delivers reliable switching action in start-circuit applications. Its universal design allows it to fit a wide range of hermetic compressors, reducing the need to stock multiple relay part numbers for different equipment. Licensed HVAC technicians and appliance repair technicians are the primary installers of this component.

The UPRO21 is used in residential and light commercial refrigeration and air conditioning systems where a push-on style start relay is required. It is a direct replacement relay suited for service calls involving compressor hard-start conditions or failed original equipment relays. Its compact footprint fits into tight compressor compartments common in refrigerators, freezers, window air conditioners, and small split-system units. Technicians working on hermetic compressor equipment will find this relay a practical stock item for service vehicles.

Key Features

• Push-on terminal mount - no tools required for installation on compatible compressor start pins
• Universal fit design reduces the need for multiple SKUs in a service inventory
• Copper contact construction for reliable electrical switching
• Compact dimensions of 4.02 inches x 2.99 inches x 2.01 inches fit tight compressor compartments
• Genuine replacement part from Sealed Unit Parts Co Inc

Compatibility

Designed as an OEM-style universal replacement push-on relay for hermetic compressors found in residential refrigeration and air conditioning equipment.

Installation Notes

Installation should be performed by a qualified HVAC or appliance repair technician. Always disconnect and lock out power to the unit before removing or installing the relay. The relay must be oriented correctly on the compressor start terminal per the compressor manufacturer's terminal layout. Verify the replacement relay's electrical ratings are appropriate for the compressor before energizing the system.