Description
Mars 19007 Type 68 Potential Relay — 502V Coil Voltage
The Mars 19007 is a Type 68 Potential Relay engineered to deliver dependable compressor starting performance in single-phase HVAC and refrigeration systems. Potential relays are a critical component in compressor motor circuits, working by sensing the back-EMF (electromotive force) generated as the motor accelerates. Once the motor reaches approximately 75% of its rated speed, the relay opens its normally closed contacts to drop the start capacitor out of the circuit — protecting the capacitor and ensuring smooth, efficient motor operation.
Key Specifications
- Part Number: 19007
- Relay Type: Type 68 Potential Relay
- Coil Voltage: 502V
- Brand: Mars
- Application: Single-phase compressor motor starting circuits
How Potential Relays Work
Potential relays monitor the voltage across the start winding of a single-phase compressor motor. During startup, the relay’s normally closed contacts keep the start capacitor in the circuit, providing the extra torque needed to get the compressor running. As motor speed climbs and back-EMF rises to the relay’s pickup voltage, the coil energizes and opens the contacts — removing the start capacitor from the circuit at precisely the right moment.
Applications
- Residential and light commercial air conditioning compressors
- Heat pump compressors
- Refrigeration compressors
- Single-phase PSC and capacitor-start motor circuits
Why Choose Mars?
Mars is a trusted name in HVAC electrical components, known for producing high-quality relays, capacitors, and motor starting accessories that meet the demanding requirements of professional HVAC technicians. The Mars 19007 is built to provide long service life and consistent performance in the field.
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