High-pressure pressure switch Johnson Controls P77AAW-9855, 3.0 – 42.0 bar, automatic, differential pressure 4.0 – 12.0 bar, solder connection 6 mm

The Johnson Controls P77AAW-9855 is a professional high-pressure pressure switch designed for use in industrial refrigeration, heat pump, and air conditioning systems . With a wide switching range of 3.0 to 42.0 bar, this model is ideal for applications with high operating pressures.

The pressure switch is automatically resetting and has an adjustable differential pressure of 4.0 to 12.0 bar , which enables precise pressure control and safe system shutdown in the event of overpressure.

The version with 6 mm solder connection ensures a solid, long-lasting connection in copper pipe systems – particularly suitable for permanent and low-maintenance installations.

Thanks to its compact design, robust materials and proven Johnson Controls quality, this switch offers a long service life and reliable performance even under demanding conditions.

🔧 Technical data:

• Model: P77AAW-9855

• Pressure range: 3.0 – 42.0 bar

• Differential pressure: adjustable from 4.0 – 12.0 bar

• Function: automatically reset

• Connection: Solder connection 6 mm

• Signal type: Single contact (Single Signal)

• Applications: Industrial refrigeration, heat pumps, commercial cooling systems, HVAC systems