Copeland 940-0102-00 Current Relay

The Copeland 940-0102-00 Current Relay is a mission-critical OEM replacement component engineered for high-torque compressor motor start-up in demanding HVACR environments. Designed to manage the precise transition of electrical current to the start winding, this current sensing relay ensures industrial and commercial refrigeration units hit operational speed without unnecessary stress on the motor. Rated for 460V at 50/60Hz, this relay features a calibrated pick-up current of 28.9 amps and a drop-out current of 13.7 amps, providing reliable protection against over-amping during the critical start cycle.

For technicians servicing Copeland compressors, the 940-0102-00 model offers a direct-fit solution that maintains system integrity better than generic alternatives. Its robust internal plunger mechanism is built to handle the high inrush currents typical of heavy-duty commercial modules. Whether you are troubleshooting a compressor that fails to start or performing preventative maintenance on a refrigeration start relay, using genuine Copeland parts is the only way to ensure the compressor start-up sequence remains within factory specifications.

Key Benefits:

• OEM Precision: Specifically calibrated for Copeland compressors to manage start-winding disconnection with professional-grade accuracy.
• Technical Ratings: Safely supports high-voltage applications with a 460V rating and dual-frequency 50/60Hz compatibility.
• Operational Reliability: Features a 28.9A pick-up and 13.7A drop-out threshold to prevent circuit overload and winding burnout.
• Direct Replacement: Simplifies installation for HVAC contractors by matching existing wiring configurations and mounting footprints.

Common Questions:

How do I test if my Copeland current relay is failing?
Using a multimeter, check for continuity between the M and S terminals. In an upright position, the contacts should be normally open (no continuity). If you turn the relay upside down and the contacts do not close, or if they remain stuck closed in the upright position, the internal plunger is likely seized and requires immediate replacement.

Can I use this relay on a 230V system?
While this relay is rated up to 460V, it is primarily engineered for the specific current draw profiles of compressors designed for 460V operation. Always verify your compressor's nameplate data and wiring diagram to ensure the coil amperage match exceeds the pick-up and drop-out requirements of this 940-0102-00 model.

What causes these relays to burn out?
Frequent cycling (short-cycling) or low voltage conditions can cause excessive arcing across the contacts. This leads to carbon buildup or "pitting," which eventually welds the contacts closed or prevents them from making a solid electrical connection.

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.