Ranco A30-301 Refrigeration Control

The Ranco A30-301 Constant Cut-In Temperature Control is a specialized HVACR refrigeration thermostat designed for high-precision cycling in commercial and residential cooling systems. Featuring a Single Pole, Single Throw (SPST) switch configuration, this cold-control ensures reliable compressor cycling based on specific evaporator temperatures. The unit is equipped with an 84-inch capillary tube, providing extensive reach for remote sensing in complex cabinet layouts. As a direct replacement for the 3030-601, the A30-301 serves as a critical OEM replacement part for technicians maintaining reach-in coolers and beverage dispensers. Its constant cut-in design prevents short-cycling by ensuring the evaporator is fully defrosted before the system re-engages, maintaining optimal refrigeration efficiency and system longevity. Whether you are performing a commercial refrigeration repair or upgrading an existing setup, this control offers a proven field-service solution for precise thermal management.

Key Technical Benefits

• Extended 84-inch Capillary: Offers significant flexibility for routing and bulb placement in confined evaporator housings.
• Direct Cross-Reference: Purpose-built to replace the Ranco 3030-601, reducing diagnostic time and installation labor.
• Constant Cut-In Precision: Standardizes defrost cycles by ensuring the cooling cycle only restarts at a preset temperature.
• Rugged SPST Switch: Engineered for high-cycle industrial applications, ensuring reliable electrical switching under standard refrigeration loads.

Common Installation Questions

What is the primary application for the Ranco A30-301?
This control is primarily utilized as a constant cut-in cold control for commercial refrigeration units, specifically targeting applications where evaporator frost management is necessary via temperature-based cycling.

Can I use this to replace a 3030-601 without modifications?
Yes, the A30-301 is the designated direct replacement for the 3030-601 model, sharing the same physical footprint and electrical specifications for a drop-in fit.

Why is the 84-inch capillary length important?
The extended capillary length allows for the control to be mounted in a protected electrical box while the sensing bulb is positioned deep within the evaporator coil or air path, which is essential for larger commercial cabinets.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.