High Pressure Switch HVAC Johnson Controls P100DA-86C SPST 575 PSIG 120/240V Manual Reset

The Johnson Controls P100DA-86C is an encapsulated high-pressure control from the PENN P100 Series, used to provide high-side overpressure protection in refrigeration and air conditioning systems. It is a compact, direct-mount, snap-action switch built for precise, repeatable pressure control across a wide range of ambient conditions. This model uses an SPST switch action that opens on a pressure rise, with a manual reset lockout that requires deliberate reset after a high-pressure trip. The setpoint is fixed and factory-calibrated to open at 575 PSIG; it is non-adjustable, which makes it a direct, reliable replacement for OEM high-pressure safety applications. The control carries a 120/240 VAC rating and connects through a 1/4 in. SAE female flare fitting with an internal Schrader valve. Widely used by HVAC and refrigeration contractors, the P100DA-86C safeguards compressors and condensing units against dangerous high-side pressure, helping reduce equipment wear and improve system reliability. Note that P100DA-86 and P100DA-86C are identical part numbers.

Manufacturer: Johnson Controls (PENN) Model: P100DA-86C Series: P100 Encapsulated Pressure Control Switch Action: SPST, open on pressure rise Reset: Manual reset lockout on high pressure Pressure Setpoint: Opens at 575 PSIG (fixed, factory-calibrated, non-adjustable) Electrical Rating: 120/240 VAC Contact Form: Single Pole Single Throw (SPST) Pressure Connection: 1/4 in. SAE female flare with internal Schrader valve Mounting: Direct mount, open construction (no conduit clamp or box) Element Type: Diaphragm, snap-acting Application: High-side pressure protection for refrigeration and air conditioning systems