The MARS 19005 is a high-performance 395V 66 potential relay engineered for heavy-duty motor starting applications in HVACR systems. As a direct replacement for 3ARR3MARS66 and various GE 3ARR3 series groups (including 3U, 3V, and 3AT), this non-positional relay ensures reliable compressor startup by precisely managing the start capacitor circuit. Designed for the professional HVAC technician, the 19005 features screw-type terminals and a universal break-off bracket, allowing for seamless installation in tight control boxes. With a pick-up voltage range of 215–225V and a drop-out voltage of 120V, it provides the exact calibration needed to protect 1/3 HP motors from overheating. This MARS potential relay is UL/CSA listed and A2L compliant, making it a versatile service truck essential for restoring refrigeration and air conditioning systems to OEM specifications without the need for complex mounting adjustments. Key Benefits Universal Compatibility: Replaces thousands of OEM models and serves as a 1-to-1 substitute for 3ARR3MARS66 and Steveco 94-66 components. Non-Positional Mounting: Features a non-positional design and a universal break-off bracket, simplifying field retrofits. Industrial Build: Rated for a 35-amp contact load with 420V hold voltage, ensuring durability in high-demand refrigeration circuits. Flexible Termination: Includes screw terminals and the QC-6 conversion kit for quick-connect 1/4-inch push-on flexibility. Common Questions What are the specific voltage ratings for the MARS 19005? This relay operates with a continuous coil voltage of 395V, a pick-up voltage between 215V and 225V, and a maximum drop-out voltage of 120V. Can I use the 19005 to replace a General Electric potential relay? Yes, the 19005 is specifically designed to replace GE 3ARR3 relay groups 3U, 3V, 3AT, 6U, 6V, and 6W. Is this relay safe for use with newer refrigerants? Yes, the MARS 19005 is A2L compliant and UL/CSA listed, meeting modern safety standards for current HVACR systems. 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.
