MARS 16091 Potential Relay
The MARS 16091 Potential Relay is a heavy-duty, voltage-sensing motor starting relay engineered for 1/3 HP single-phase compressor applications. Built as a direct OEM replacement relay for Bristol and Copeland systems, this component is critical for managing the transition between start and run cycles. It utilizes back electromotive force (BEMF) to precisely disconnect the start capacitor once the motor achieves approximately 75-80% of its rated speed, preventing winding damage and ensuring efficient torque delivery. Rated for 35 Amps at 60 Hz, the 16091 features a robust 180 to 193 pick-up voltage range and a 383V hold voltage, making it a reliable choice for commercial refrigeration and residential air conditioning maintenance.
For service contractors, this unit simplifies field repairs with its quick connect terminals and an integrated tab-type bracket. Its UL/CSA listed construction ensures it meets strict safety standards for high-amperage switching. Whether you are troubleshooting a compressor that fails to start or performing a proactive HVAC motor relay replacement, the MARS 16091 provides the exact calibration required for 3ARR3KC24S5 and 040-0001-60 specifications, maintaining system integrity without the need for complex modifications.
Key Benefits for Technicians:- Direct OEM Compatibility: Engineered as a 1:1 replacement for Copeland and Bristol compressors, ensuring precise drop-out voltage (55 to 115V) and pick-up timing.
- Industrial-Grade Contacts: Rated for 35A continuous duty, providing superior arc resistance and reliable switching under heavy inductive loads.
- Streamlined Installation: Features a tab-mounted plastic cover and standard terminal designations (1, 2, 5) for fast, error-free wiring in space-constrained enclosures.
- Safety Verified: A2L compliant and UL/CSA recognized, meeting modern refrigerant safety standards and ensuring peak performance in demanding environments.
- High Reliability: Eliminates the common "stuck contact" failures found in generic alternatives, protecting expensive start windings from overheating.
How do I troubleshoot a MARS 16091 with a multimeter?
With power disconnected, measure resistance across terminals 1 and 2; you should see near 0 ohms as these are normally closed contacts. Then, check the coil resistance between terminals 2 and 5; a healthy coil typically reads between 3,000 and 15,000 ohms depending on the specific calibration.
Can I use this relay for a compressor higher than 1/3 HP?
No. This relay is specifically calibrated for 1/3 HP motors. Using it on a larger compressor may cause the contacts to weld shut or the coil to fail due to incorrect pick-up voltage requirements.
What happens if the potential relay stays closed?
If the contacts fail to open, the start capacitor remains in the circuit, which leads to high amperage in the start winding. This will typically trip the thermal overload and can eventually destroy the compressor or the capacitor.
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.
MARS 16091 Potential Relay
The MARS 16091 Potential Relay is a heavy-duty, voltage-sensing motor starting relay engineered for 1/3 HP single-phase compressor applications. Built as a direct OEM replacement relay for Bristol and Copeland systems, this component is critical for managing the transition between start and run cycles. It utilizes back electromotive force (BEMF) to precisely disconnect the start capacitor once the motor achieves approximately 75-80% of its rated speed, preventing winding damage and ensuring efficient torque delivery. Rated for 35 Amps at 60 Hz, the 16091 features a robust 180 to 193 pick-up voltage range and a 383V hold voltage, making it a reliable choice for commercial refrigeration and residential air conditioning maintenance.
For service contractors, this unit simplifies field repairs with its quick connect terminals and an integrated tab-type bracket. Its UL/CSA listed construction ensures it meets strict safety standards for high-amperage switching. Whether you are troubleshooting a compressor that fails to start or performing a proactive HVAC motor relay replacement, the MARS 16091 provides the exact calibration required for 3ARR3KC24S5 and 040-0001-60 specifications, maintaining system integrity without the need for complex modifications.
Key Benefits for Technicians:- Direct OEM Compatibility: Engineered as a 1:1 replacement for Copeland and Bristol compressors, ensuring precise drop-out voltage (55 to 115V) and pick-up timing.
- Industrial-Grade Contacts: Rated for 35A continuous duty, providing superior arc resistance and reliable switching under heavy inductive loads.
- Streamlined Installation: Features a tab-mounted plastic cover and standard terminal designations (1, 2, 5) for fast, error-free wiring in space-constrained enclosures.
- Safety Verified: A2L compliant and UL/CSA recognized, meeting modern refrigerant safety standards and ensuring peak performance in demanding environments.
- High Reliability: Eliminates the common "stuck contact" failures found in generic alternatives, protecting expensive start windings from overheating.
How do I troubleshoot a MARS 16091 with a multimeter?
With power disconnected, measure resistance across terminals 1 and 2; you should see near 0 ohms as these are normally closed contacts. Then, check the coil resistance between terminals 2 and 5; a healthy coil typically reads between 3,000 and 15,000 ohms depending on the specific calibration.
Can I use this relay for a compressor higher than 1/3 HP?
No. This relay is specifically calibrated for 1/3 HP motors. Using it on a larger compressor may cause the contacts to weld shut or the coil to fail due to incorrect pick-up voltage requirements.
What happens if the potential relay stays closed?
If the contacts fail to open, the start capacitor remains in the circuit, which leads to high amperage in the start winding. This will typically trip the thermal overload and can eventually destroy the compressor or the capacitor.
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.
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The MARS 16091 Potential Relay is a heavy-duty, voltage-sensing motor starting relay engineered for 1/3 HP single-phase compressor applications. Built as a direct OEM replacement relay for Bristol and Copeland systems, this component is critical for managing the transition between start and run cycles. It utilizes back electromotive force (BEMF) to precisely disconnect the start capacitor once the motor achieves approximately 75-80% of its rated speed, preventing winding damage and ensuring efficient torque delivery. Rated for 35 Amps at 60 Hz, the 16091 features a robust 180 to 193 pick-up voltage range and a 383V hold voltage, making it a reliable choice for commercial refrigeration and residential air conditioning maintenance.
For service contractors, this unit simplifies field repairs with its quick connect terminals and an integrated tab-type bracket. Its UL/CSA listed construction ensures it meets strict safety standards for high-amperage switching. Whether you are troubleshooting a compressor that fails to start or performing a proactive HVAC motor relay replacement, the MARS 16091 provides the exact calibration required for 3ARR3KC24S5 and 040-0001-60 specifications, maintaining system integrity without the need for complex modifications.
Key Benefits for Technicians:- Direct OEM Compatibility: Engineered as a 1:1 replacement for Copeland and Bristol compressors, ensuring precise drop-out voltage (55 to 115V) and pick-up timing.
- Industrial-Grade Contacts: Rated for 35A continuous duty, providing superior arc resistance and reliable switching under heavy inductive loads.
- Streamlined Installation: Features a tab-mounted plastic cover and standard terminal designations (1, 2, 5) for fast, error-free wiring in space-constrained enclosures.
- Safety Verified: A2L compliant and UL/CSA recognized, meeting modern refrigerant safety standards and ensuring peak performance in demanding environments.
- High Reliability: Eliminates the common "stuck contact" failures found in generic alternatives, protecting expensive start windings from overheating.
How do I troubleshoot a MARS 16091 with a multimeter?
With power disconnected, measure resistance across terminals 1 and 2; you should see near 0 ohms as these are normally closed contacts. Then, check the coil resistance between terminals 2 and 5; a healthy coil typically reads between 3,000 and 15,000 ohms depending on the specific calibration.
Can I use this relay for a compressor higher than 1/3 HP?
No. This relay is specifically calibrated for 1/3 HP motors. Using it on a larger compressor may cause the contacts to weld shut or the coil to fail due to incorrect pick-up voltage requirements.
What happens if the potential relay stays closed?
If the contacts fail to open, the start capacitor remains in the circuit, which leads to high amperage in the start winding. This will typically trip the thermal overload and can eventually destroy the compressor or the capacitor.
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.
