Description
Mars 19164 Model 164 Potential Relay — 395V
The Mars 19164 is a Model 164 Potential Relay engineered for dependable single-phase compressor motor starting applications. Potential relays play a critical role in HVAC and refrigeration systems by monitoring the back-EMF generated by the compressor motor during start-up and dropping out the start capacitor at the correct moment — protecting the capacitor and motor from damage while ensuring a smooth, reliable start every time.
How It Works
As the compressor motor accelerates, the voltage across the start winding rises. When this voltage reaches the relay’s pickup voltage (395V), the relay opens its normally closed contacts, removing the start capacitor from the circuit. This precise switching action prevents overheating of the start capacitor and extends the service life of the compressor.
Key Features
- Pickup voltage: 395V
- Designed for single-phase compressor motor starting circuits
- Drops out start capacitor at the correct motor speed for reliable, repeatable starts
- Compact, durable construction suited for residential and light commercial HVAC and refrigeration equipment
- Direct replacement for failed or aging potential relays in the field
- Mars quality construction for long service life and consistent performance
Applications
- Air conditioning compressors
- Heat pump compressors
- Refrigeration compressors
- Single-phase motor starting circuits requiring start capacitor switching
Why Choose Mars Potential Relays?
Mars has been a trusted name in HVAC electrical components for decades. Their potential relays are built to meet the demands of professional HVAC technicians, offering reliable performance, easy installation, and broad compatibility with common compressor motor configurations. The Mars 19164 is an ideal stock item for service vans and supply houses alike.
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