Copeland 940-0140-04 Relay

The Copeland 940-0140-04 is a professional-grade Quick Connect Potential Relay engineered for precision motor starting in high-torque refrigeration and air conditioning applications. Designed for single-phase compressor systems, this OEM component utilizes a voltage-sensing circuit to accurately manage the transition between start and run cycles. This relay is vital for protecting the start winding by disconnecting the start capacitor once the motor reaches the required breakdown torque, ensuring reliable compressor motor starting even under significant head pressure or fluctuating line voltage.

Constructed with durable copper and brass internals, the Copeland 940-0140-04 Relay is built to withstand extreme mechanical room environments, with an operating temperature range of -40°F to 248°F. The twin tab terminal design facilitates rapid field replacement, minimizing downtime during critical service calls. As a direct HVAC potential relay replacement, it provides stable pick-up (190/200V) and drop-out (40/90V) characteristics at 290V, 60Hz. This ensures optimal electrical support during the startup phase, reducing power consumption and extending the overall duty cycle of the compressor unit.

• Optimized Motor Acceleration: Specifically calibrated for single-phase compressor startup to prevent winding overheating.
• Robust Environmental Tolerance: Heavy-duty build quality allows for reliable operation in temperatures from -40°F to 248°F.
• Streamlined Installation: Features quick connect terminals for fast, secure wiring across various HVAC refrigeration systems.
• Voltage Precision: Maintains exact pick-up and drop-out thresholds to ensure capacitors are engaged only when necessary.
• Broad Compatibility: Engineered as a standard OEM replacement part for a wide range of Copeland-powered equipment.

• How do I confirm if the 940-0140-04 is compatible with my compressor? Reference the compressor's nameplate and Bill of Materials (BOM); this relay is typically used with high-starting torque single-phase motors.
• Can I use this relay to replace a generic potential relay? While universal relays exist, using this genuine Copeland compressor part ensures the pick-up and drop-out voltages match the manufacturer's specific motor torque curve.
• What causes a potential relay like this to fail? Frequent short-cycling or severe undervoltage can lead to contact pitting or coil burnout, necessitating a direct replacement to prevent compressor damage.

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.