Johnson Controls P20CA-146 Pressure Control

The Johnson Controls P20CA-146 Pressure Control is a heavy-duty, high pressure cutout designed for air conditioning and refrigeration systems. Engineered for high-side protection, this adjustable pressure switch features a wide operating range from 100 to 425 PSI, ensuring reliable performance in demanding HVACR applications. Use this control when you need an automatic reset mechanism that triggers "open" on a pressure rise at 300 PSI. With its 19 PSI fixed differential, it provides precise refrigeration pressure control while preventing short-cycling of the compressor. The 36-inch capillary tube offers maximum installation flexibility, allowing for secure mounting away from high-vibration areas. This model is technically identical to the P20CA-146C, making it a direct HVAC pressure switch replacement for existing systems using that specification. For technicians managing R-22 or R-410A systems, the P20CA-146 serves as a critical safety component to protect the 1HP rated motor and system integrity against excessive head pressure.

Key Benefits

• Precise High-Pressure Protection: High-side cutout range of 100?425 PSI ensures system safety during peak thermal loads.
• Ease of Installation: Included 36-inch capillary allows for remote mounting, protecting the switch from direct mechanical vibration and heat.
• Dependable Auto-Reset: Features an automatic reset function that resumes operation once pressure drops below the 19 PSI differential threshold.
• Universal Compatibility: The Johnson Controls P20CA-146 is a 1:1 match for the P20CA-146C, simplifying inventory and field replacements.

Common Questions

Technically, there is no functional difference. The P20CA-146 and P20CA-146C share the same electrical ratings, pressure ranges, and physical dimensions. They are interchangeable in all professional HVACR applications.

No, this model is specifically calibrated as a high-pressure cutout that opens on pressure rise. It is not designed for low-pressure monitoring or suction line protection.

The P20CA-146 is rated for 1HP at 120/240V AC, making it suitable for direct control of small compressors or as a pilot duty trigger for larger contactors.

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.