Ranco mini high-pressure pressure switch, NC, 21 – 28 bar, automatic, SPST, 1/4" SAE flare

The Ranco mini high-pressure pressure switch was specially developed for monitoring and controlling high pressure ranges in refrigeration, air conditioning, and heat pump systems . With a switching range of 21 to 28 bar, it reliably protects compressors and systems from dangerously high operating pressures —an essential component for professional use in commercial refrigeration.

The integrated NC (Normally Closed) function means that the circuit is closed in the idle state and opens automatically when the set pressure value is reached. This reliably protects connected components, such as compressors, from overload or pressure spikes .

The automatic reset ensures that the switch automatically returns to its original position after the pressure is released – for uninterrupted and low-maintenance operation .

The standardized 1/4" SAE flare connection enables quick, leak-free and solder-free installation , which is particularly advantageous during service or retrofitting.

✅ Product advantages at a glance:

• Switching range 21–28 bar – ideal for high-pressure monitoring

• NC function (Normally Closed): opens the circuit in case of overpressure

• SPST contact: reliable electrical control

• Automatic reset: no manual reset required

• 1/4" SAE flare connection: easy installation without soldering

• Ideal for compressor protection, refrigeration systems, heat pumps and HVAC systems

🔧 Technical data:

• Brand: Ranco

• Type: Mini high pressure pressure switch

• Pressure range: 21 – 28 bar

• Function: NC (Normally Closed)

• Contact: SPST

• Reset: Automatic

• Connection: 1/4" SAE flare

• Applications: Commercial refrigeration, air conditioning, heat pumps, compressor protection

Weight: approx. 0.17 kg
Scope of delivery: 1 × Ranco mini high-pressure pressure switch, NC, automatically reset