Copeland 940-0001-49 Relay Kit

The Copeland 940-0001-49 Potential Relay Kit is a critical OEM component designed for precision start-cycle management in high-torque refrigeration and HVACR systems. As a field-ready solution, this kit is the authorized replacement for 3ARR3KC3E5 and 040-0001-03 configurations. Engineered with a 290V rating and 50/60Hz frequency compatibility, it features specific electrical parameters including a 340/360V pick-up voltage and a 50/100V drop-out range. This HVAC compressor start relay ensures the start capacitor is efficiently de-energized once the motor reaches the required velocity, protecting the windings from thermal stress and potential failure. The potential relay troubleshooting process is simplified by the kit’s inclusion of a wiring harness and necessary hardware, allowing for seamless integration into existing Copeland compressor housings. With 3-screw terminals and a panel-mount design, this Copeland 940-0001-49 unit provides the electrical noise rejection and reliability required for demanding industrial and commercial cooling applications.

• Direct Cross-Reference: Serves as the official replacement for 3ARR3KC3E5 potential relays, ensuring exact electrical matching for OEM specifications.
• System Protection: Actively monitors B+ potential across 3 AC power supply lines to prevent locked-rotor or run-away conditions.
• Universal Frequency Support: Built to operate reliably across both 50Hz and 60Hz cycles, making it suitable for a wide range of global refrigeration equipment.
• Efficient Installation: Features a rugged panel-mount design with screw terminals for secure, vibration-resistant connections in high-duty environments.

Is the 940-0001-49 compatible with non-Copeland compressors?
While specifically optimized for Copeland refrigeration systems, this potential relay can be used in other applications provided the pick-up and drop-out voltages match the motor's technical requirements.

Does this kit include the start capacitors?
This specific kit focus is the potential relay and wiring; always verify your capacitor microfarad (MFD) ratings when performing a compressor start kit installation.

What is the primary cause of potential relay failure?
Most failures result from contact pitting or welded contacts due to rapid cycling, undersized wiring, or sustained low-voltage conditions at the compressor.

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.