Danfoss 117-7427 Relay

The Danfoss 117-7427 Relay is a precision-engineered potential relay designed for reliable compressor starting in light commercial refrigeration and HVAC systems. Also referenced as the RVA 4H3R starting relay, this component is essential for managing the start capacitor circuit, ensuring it is de-energized once the motor reaches the required pick-up voltage. As an OEM replacement part manufactured by Secop (formerly Danfoss Compressors), it ensures seamless compatibility with light commercial compressors, maintaining the operational integrity of the system without the risks associated with universal "one-size-fits-all" components.

For service technicians, the Danfoss 117-7427 offers a robust internal mechanism capable of handling high-current loads during the critical start cycle. Its compact footprint is ideal for tight electrical housings, while the standardized terminal configuration simplifies field installation. Whether you are performing a reactive repair or a preventative overhaul, utilizing a Danfoss compressor relay ensures that the motor windings are protected from prolonged capacitor engagement, significantly extending the service life of the compressor. This relay is built to withstand environmental stressors and provides the rapid response time necessary for high-cycle industrial applications.

• Precision Voltage Sensing: Optimized pick-up and drop-out voltage settings prevent premature motor wear.
• OEM Compatibility: Exact 117-7427 cross-reference with Secop and Danfoss light commercial units.
• High Current Capacity: Engineered to manage the electrical potential of heavy-duty starting capacitors.
• Durable Construction: Built to industrial standards for high-frequency switching in demanding HVACR environments.

Is the Danfoss 117-7427 compatible with other relay brands?
This is an OEM potential relay. While cross-references exist, verifying the specific coil voltage and contact ratings against the original manufacturer's compressor specifications is recommended to ensure timing accuracy.

What are the symptoms of a failing 117-7427 relay?
Common failure signs include the compressor "humming" but failing to start, or the start capacitor overheating due to the relay contacts sticking in the closed position.

Can I use this on a residential AC unit?
The Danfoss 117-7427 is specifically designed for light commercial refrigeration and HVAC applications. Always check the electrical data plate of your compressor to confirm the required relay type.

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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.