Copeland 940-C411-91 Relay

The Copeland 940-C411-91 Relay is a critical OEM current sensing relay designed for precise compressor motor starting in high-performance HVACR systems. Built to withstand the rigorous demands of commercial refrigeration and air conditioning service, this component ensures the start winding is efficiently energized during the locked rotor amperage phase before dropping out once the motor achieves operational speed. This specific 940-C411-91 model provides optimal compressor troubleshooting reliability by maintaining factory-standard electrical timing, preventing premature component wear and starting failures. As a direct OEM replacement part, it offers seamless HVAC system compatibility with Copeland hermetic and semi-hermetic compressors, effectively managing the high inrush current required for dependable startup. Contractors rely on this genuine Copeland relay to maintain HVAC system efficiency and prevent the common nuisance tripping often associated with non-standard, generic aftermarket alternatives. When your diagnostics point to a failing start circuit, replacing the 940-C411-91 ensures the electrical signature matches the original manufacturer specifications for long-term system stability.

• Precise Current Sensing: Tailored to Copeland compressor specifications to accurately switch the start winding based on motor amperage.
• OEM Performance: Ensures full technical specification alignment, eliminating the guesswork associated with generic 5-2-1 or potential relay substitutes.
• High Duty Cycle: Engineered for the repeat cycles of commercial HVAC maintenance, resisting contact pitting and coil burnout.
• Rapid Installation: Standardized terminal layout allows for quick refrigeration repair, reducing labor time and truck-stock complexity.

• How do I confirm the 940-C411-91 is compatible with my compressor? Reference the Copeland Mobile app or the Bill of Materials (BOM) on your unit to cross-verify the specific relay part number for your motor's electrical configuration.
• What are the signs of a failing current relay? If you notice the compressor humming but not starting, or if it trips the overload protector immediately upon startup, the relay contacts may be stuck or the coil may be open.
• Should I replace the start capacitor when replacing this relay? It is a trade best practice to inspect and/or replace all starting components simultaneously to ensure peak electrical system performance and prevent future call-backs.

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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.