The Johnson Controls P77AAA-9351 is part of the P77 Series encapsulated electronic pressure controls. These are direct-mount, factory-calibrated, non-adjustable pressure switches designed for HVAC and refrigeration applications. The 9351 variant is a high-pressure cutout switch with automatic reset and SPDT contacts, intended for compressor protection and condenser fan cycling.

• Type: Encapsulated electronic pressure control
• Series: P77AAA (PENN Controls, Johnson Controls)
• Function: Provides snap-action switching based on refrigerant pressure.
• Reset Type: Automatic reset (trip-free design prevents override).
• Mounting: Direct-mount with 1/4 in. SAE flare fitting and Schrader-type depressor.
• Encapsulation: Compact, dust-tight, rugged housing for harsh environments.

Specifications (Typical for P77AAA-9351)