MARS 19168 Potential Relay

The MARS 19168 Potential Relay is a high-performance motor starting relay engineered for single-phase HVACR equipment requiring high starting torque. Specifically designed for 502V coil voltage applications, this 168 series relay facilitates the seamless cutout of start capacitors once the compressor or motor reaches approximately 75% to 80% of its rated speed. With a robust 35 amp contact rating and a 480 VAC maximum contact voltage, this component is built to manage the rigorous back-EMF generated by heavy-duty commercial compressors.

This non-positional relay features a universal break-off bracket, ensuring compatibility with a wide range of OEM mounting configurations. The internal normally closed (NC) contacts are calibrated for a precise pick-up voltage range of 323-352V and a drop-out voltage of 75-135V. Its cULus certification and A2L refrigerant compliance make it a technical standard for professional contractors performing maintenance on high-voltage HVAC compressor start assists and refrigeration systems.

• Universal Compatibility: The MARS 168 relay serves as a direct replacement for thousands of OEM models, reducing the need for extensive truck stock.
• High Current Capacity: Features a heavy-duty 35A contact rating capable of handling demanding electrical loads in 480V systems.
• Flexible Installation: The non-positional design and universal tab mount allow for secure installation at any angle within the control box.
• Reliable Motor Protection: Precisely manages the start circuit to prevent capacitor overheating and winding damage.

What are the wiring positions for the MARS 19168?
Following the industry-standard 5-2-1 logic, the 502V coil is wired between terminals 5 and 2, while the start capacitor is controlled via the normally closed contacts between terminals 1 and 2.

Can I use this relay for A2L refrigerant systems?
Yes, the 19168 model is fully A2L compliant, making it suitable for modern low-GWP refrigerant installations and repairs.

What is the maximum coil voltage this unit can withstand?
The MARS 168 is specifically rated for a 502 continuous coil voltage, making it ideal for high-voltage industrial applications where standard relays might fail due to excessive 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.