Product Specifications

Adjustable Temperature Controls

The 74T line of temperature controls features adjustable fan or limit operation in a versatile 3/4” (19mm) bimetal disc design. Available in calibrations from 110°F to 250°F (43°C to 121°C) and mean differentials from 20°F to 40°F (11°C to 22°C), the 74T allows adjustment of the operating temperature within an approximate 40°F (22°C) thermal range. The snap action of the temperature sensing bimetal disc provides high-speed contact separation for exceptional life characteristics at electrical loads up to 25 Amps at 240VAC. Airstream or surface mounting flanges are available with the 74T.

Features and Benefits

• Adjustable operating temperatures for maximum design or service flexibility.

• Snap-action bimetal disc for high-speed contact separation.

• Welded construction for integrity or current carrying components.

• Available with an exposed or enclosed bimetal disc for either increased thermal response or protection from airborne contaminants.

• The use of Statistical Process Control (SPC) techniques in all phases of the manufacturing process.


Switch Action and Typical Applications

The 74T is an automatic reset single pole, single throw (SPST) switch that can be built to either open or close its electrical contacts on temperature rise. The desired calibration can be adjusted within the thermal range of the pointer set positions. Once the application temperature cools to the specified reset differential, the contacts automatically return to their original state.

Typical applications include fan controls for heating products and regulating controls for appliances. The ability to adjust calibrations also makes the 74T an excellent choice for service or field replacement applications.

Mounting Brackets

The 74T is available in either airstream or surface mount configurations. Exposed or enclosed bimetal disc versions may be specified with any of the mounting configurations.