Secop Diversitech 117-7441 Potential Relay

The Secop Diversitech 117-7441 Potential Relay is a specialized 115V/60Hz potential relay engineered for high-starting torque (HST) applications, particularly within the Secop SC series and NF model compressors. This compressor start relay utilizes a high-resistance coil (terminals 2 and 5) and normally closed contacts (terminals 1 and 2) to manage the start capacitor's duration in the circuit. By sensing the Back Electromotive Force (BEMF) generated by the motor, it ensures the start capacitor is dropped out precisely when the motor reaches approximately 75% of its synchronous speed. This operation is critical for HVAC troubleshooting and preventing winding damage during motor startup. Designed for durable performance in commercial refrigeration and single-phase motor starting, the 117-7441 features 1/4 inch spade connections for integrated mounting directly onto the compressor housing. Its compact build and 35A rating facilitate reliable protection against voltage disturbances in demanding industrial environments.

• Optimized Starting Torque: Effectively manages the transition for capacitor-start capacitor-run (CSCR) motors, providing the necessary torque under pressure.
• BEMF Precision: Uses calibrated pickup voltage to switch the start circuit, reducing the risk of start capacitor failure.
• HVACR Grade Durability: Rugged construction suitable for LBP (Low Back Pressure) applications and harsh environment air conditioning systems.
• Standardized Integration: Equipped with industry-standard 1/4 inch spade terminals for rapid field replacement and secure wiring.

How do I test the 117-7441 for failure?
Using an ohmmeter, check for high resistance across terminals 2 and 5 (the coil). A reading of OL indicates a failed coil. Terminals 1 and 2 should show near 0 ohms when de-energized, as they are normally closed.

Can this relay replace a universal hard start kit?
While universal kits exist, the Secop 117-7441 is a calibrated OEM component for specific compressor frames. For maximum motor reliability, always use a dedicated potential relay over electronic timers or PTCR devices.

What compressor series is this compatible with?
This relay is primarily utilized on Secop (formerly Danfoss) SC and NF series compressors operating on 115V power supplies, often paired with 280-410 MFD start capacitors.

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.