Johnson Controls P170AA-400 Pressure Switch 100-470 PSI 1/4" Flare SPST

The Johnson Controls P170AA-400 is a single pole single throw (SPST) pressure switch designed for HVAC and refrigeration applications. This control switches on pressure rise, with an open-low configuration that keeps contacts open when pressure is below the setpoint.

Key Features:

• Pressure range: 100 to 470 PSI adjustable setpoint
• 1/4" SAE flare connection for easy installation
• SPST contact configuration (single pole, single throw)
• Open-low operation: contacts open when pressure drops below setpoint
• Rugged construction for commercial refrigeration and air conditioning systems
• Manual reset design for safety applications

This pressure control is commonly used as a high-pressure safety switch in refrigeration systems, protecting compressors and other equipment from dangerously high discharge pressures. The adjustable differential and setpoint allow for precise control tailored to specific system requirements.