Ranco A30-543 Control

The Ranco A30-543 is a specialized constant differential temperature control engineered for high-precision switching in commercial refrigeration and ice machine applications. This robust SPST cold control features a 27" capillary tube with vapor-filled sensing technology, providing the pneumatic action required for responsive system cycling. Designed for the rigors of field service, it operates across a temperature range of 7°F to 55°F, with factory-calibrated settings of 27°F (Warm On) and 15°F (Normal Off). The fixed 12°F differential ensures tight cycle management, protecting compressors from short-cycling while maintaining consistent product temperatures.

For the contractor, the A30-543 control offers maximum versatility. It includes break-off adjustment shafts and standard 1/4" quick-connect terminals, making it a reliable universal refrigeration thermostat replacement for various reach-in coolers and dispensers. The laser-welded stainless steel bellows and high-amperage contacts (20A @ 120/240V AC) are built for longevity in demanding industrial environments. Integrate this Ranco A30 series control to ensure accurate ice machine temperature regulation and maintain optimal thermal efficiency across your fleet of equipment.

• Precise Differential: Features a fixed 12°F differential to prevent erratic cycling and ensure stable evaporative conditions.
• Durable Sensing: The 27-inch capillary is protected against work-hardening, offering flexibility during routing and high sensitivity to temperature fluctuations.
• High Electrical Capacity: Rated for 20 Full Load Amps (FLA) at 120/240V, handling heavy inductive loads in commercial refrigeration circuits.
• Universal Compatibility: Adaptable to nearly all commercial freezers and refrigerators requiring a 7-55°F operating window.
• Contractor-Ready Design: Comes with mounting brackets and a dial-type adjustment for fast, intuitive configuration on the job site.

Can the A30-543 be used for both heating and cooling?
This specific model is a cold control designed primarily for refrigeration; however, because it uses an SPST switch that opens on a temperature drop, it is ideal for cooling-logic applications like ice machines and beverage dispensers.

What is the purpose of the 27" capillary?
The extended capillary length allows for the control body to be mounted remotely from the evaporator or sensing point, providing the reach needed for large reach-in cabinets or complex ice machine chassis.

What are the electrical ratings for this control?
The control is rated for 20A FLA / 80A LRA at 120/240V AC, and 16A FLA / 60A LRA at 277V AC, making it compatible with most standard commercial line voltage applications.

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.