Ranco A30-X450 Control

The Ranco A30-X450 Control is a field-proven constant differential temperature control engineered for precision compressor cycling in commercial refrigeration and room air conditioning units. As a high-performance SPST (Single Pole, Single Throw) switch, this unit features an open-on-low action, ensuring critical components are deactivated when temperatures drop below the 58°F to 86°F operating range. Built for durability in the field, it utilizes a laser-welded stainless steel bellows and a sensitive air coil bulb (18-inch capillary) to provide rapid, accurate thermal response without the lag found in inferior sensors.

This OEM-adaptable cold control is designed for the veteran contractor who needs a reliable solution for universal replacement applications. With high-amperage contacts rated for up to 20/16A full load, the A30-X450 provides robust power handling for high-demand motors and compressors. The 5°F fixed differential offers tight regulation, preventing short-cycling while maintaining consistent environment parameters. The kit includes a break-off shaft and mounting bracket, allowing for seamless integration into existing cabinetry and control panels across various HVACR platforms.

• Universal Compatibility: Specifically designed to replace a wide range of OEM controls in vending machines, beverage coolers, and room A/C units.
• Precision Sensing: The 1-3/8" x 2-1/4" coiled element (air coil) provides superior surface area for accurate ambient air monitoring.
• Rugged Internal Design: Features pneumatic action driven by vapor-filled capillary systems for long-term mechanical reliability.
• Easy Installation: Standard 1/4" quick-connect terminals and a flatted/slotted shaft design simplify field wiring and knob fitment.

What is the primary application for the "Open Low" configuration?
In "Open Low" (or Cold Off) setups, the switch breaks the circuit when the temperature falls to the set point, commonly used to prevent evaporator freeze-ups or to cycle compressors in air conditioning and "warm-range" refrigeration systems.

Can the A30-X450 be used for heating applications?
No, this is a cold control with an open-low action. For heating applications, a close-on-rise or "open-high" control would typically be required to ensure the load is energized when heat is needed.

Is the capillary tube safe to bend?
While the 18-inch air coil capillary is adaptable, any kinks in the tubing will restrict the vapor charge and cause the control to fail. Always use a large radius bend when positioning the sensing bulb.

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.