Copeland 940-C411-80 Compressor Relay

The Copeland 940-C411-80 Compressor Relay is a high-performance current start relay engineered for single-phase fractional horsepower compressors. Designed to manage the electrical power supply during critical start-up cycles, this OEM compressor relay features a 120 VAC voltage rating and is calibrated for an amperage range of 16.7-14.0 Amps. With a contact rating of 20A and a frequency of 50/60 Hz, this component ensures consistent torque for motor activation in residential and commercial refrigeration systems. Built for durability in demanding environments, the 940-C411-80 operates effectively across a wide temperature range from -40°C to 85°C. As a genuine HVAC start relay, it provides exact fitment and electrical compatibility, replacing the 040-0163-04 and 040-0141-21 current relays. For technicians performing compressor relay troubleshooting or motor repairs, this part delivers the reliability required to maintain system efficiency and protect the compressor motor from start-winding failure.

• Precision Calibration: Optimized for 16.7-14.0 Amp range to ensure accurate start-winding cutout.
• Industrial Durability: Rated for high-temperature environments up to 85°C for long-term field reliability.
• OEM Compatibility: Direct replacement for Copeland part 940-C411-80, ensuring zero-clearance issues during installation.
• Broad Application: Suitable for both 50Hz and 60Hz single-phase refrigeration and A/C compressor configurations.

• How do I test a Copeland current start relay for continuity? Technicians should de-energize the system and use a multimeter to check for a normally open state across the contacts. The coil, wired in series with the run winding, should show low resistance.
• What are the symptoms of a failing 940-C411-80 relay? Common indicators include the compressor failing to start, repeated tripping of the thermal overload protector, or audible humming without motor rotation.
• Can this relay replace a potential start relay? No. This is a current-sensitive relay designed for specific fractional HP motors; always verify the wiring diagram and motor type before substituting relay technology.

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Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.