Product Specifications

Adjustable Temperature Controls

The 58T line of adjustable temperature controls from Therm-O-Disc is designed for applications requiring accurate calibration tolerances and narrow temperature differential. The bimetal disc design of the 58T provides instantaneous “snap action” contact operation, which offers excellent reliability under heavy electrical load conditions – 277VAC, 25 amps resistive and 20 amps inductive.

Features and Benefits:

• Tight calibration and differential tolerances provide accurate temperature control.

• Instantaneous contact separation provides excellent reliability for use in applications with heavy inductive or resistive electrical loads.

• A wide variety of mounting brackets, adjusting stems, terminals and lead wires provide excellent design flexibility.

• The use of Statistical Process Control (SPC) techniques in all phases of the manufacturing process results in consistent high quality levels.

Applications:

Typical applications include electric baseboard heaters, room air conditioners, portable and built-in electric heaters and attic ventilator fans.

Switch Actions

The 58T cycling contacts are single pole, single throw (SPST). They can be provided to open on temperature rise and close on temperature fall, as required for electric heat applications; or to close on temperature rise and open on temperature fall, as required for air conditioning applications. The 58T is available with auxiliary mechanically operated contacts to provide either a double pole break in the “off” position for electric heat applications or a “fan on only” feature.

Thermal Characteristics:

Calibration – The 58T can be calibrated at any temperature from 30°F (-1°C) to 150°F (65.5°C). Our preferred calibration tolerance is ±3°F (±1.7°C), with a ±2°F (±1.1°C) tolerance available when required.

Differential: – The differential is the difference between the nominal open and close temperatures. Preferred differentials are 5°F (3°C), 6°F (3.5°C) or 7°F (4°C) with a ±2°F (±1.1°C) tolerance. A 4°F (±2.8°C) differential is also available with a ±2°F (±1.1°C) tolerance.

Range: – The range is the difference between the thermostat operating temperatures measured at extremes of the set positions of the adjusting stem – full clockwise vs. full counterclockwise. Preferred ranges for the 58T are 30°F (-1°C), 45°F (7.2°C), 60°F (15.6°C) and 90°F (32.2°C).