Secop Diversitech 117U4126 Starting Relay

The Secop 117U4126 starting relay is a high-torque HST starting device engineered for fractional horsepower compressors, specifically those utilizing CSR (Capacitive Start - Run) and CSIR (Capacitive Start - Induction Run) motor configurations. Designed for compatibility with Secop compressors like the FR, SC, and TL series, this relay provides the necessary electrical impulse to activate the start windings under high back pressure conditions. Built to strictly manage LRA (Locked Rotor Amps) during the initial startup phase, the 117U4126 ensures reliable torque delivery without overheating the windings. HVACR technicians rely on this specific Secop 117U4126 relay for precise hermetic compressor motor control in commercial refrigeration units and heat pumps. When performing a field replacement, verify the electrical ratings match the original compressor start relay to maintain system efficiency and prevent nuisance tripping of the overload protector. This component is essential for maintaining OEM performance standards in R134a and R404A systems.

• High Starting Torque (HST): Provides the amperage boost required for compressors starting against high differential pressures.
• OEM Compatibility: Engineered for seamless integration with Secop/Danfoss FR, SC, and TL compressor series.
• Optimized Motor Control: Manages the transition between start and run cycles to protect sensitive motor windings.
• Rugged Electrical Design: Built to withstand the high temperatures and frequent cycling common in commercial refrigeration.

Common Technical Questions

What are the signs that a 117U4126 start relay needs replacement?
If the compressor is humming but failing to turn over, or if you hear a repetitive clicking from the overload protector, the 117U4126 start relay has likely failed to energize the start capacitor/winding. Always check for continuity across the relay terminals.

Can I use this relay with a permanent split capacitor (PSC) motor?
No, this HST starting relay is designed specifically for CSR/CSIR configurations that require a high torque boost. Using it on a motor not designed for a start capacitor can lead to premature component failure.

Is this compatible with generic 1/3 HP compressors?
While ratings may overlap, it is critical to use the Secop 117U4126 only where specified by the manufacturer's cross-reference guide to ensure the pick-up and drop-out voltages align with the motor's back EMF.

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.