Product Specifications

Snap-Action Temperature Controls

The 49T line of controls from Therm-O-Disc offers proven 3/4” (19mm) bimetal disc reliability in a high temperature package. The ceramic design of the 49T control, along with the snap action of the bimetal disc, provides exceptional life characteristics at calibrations up to 550°F (288°C) and override temperatures up to 625°F (329°C). The bimetal disc housing may be either enclosed for protection from contaminants or exposed for greater thermal sensitivity. To ensure electrical integrity, terminal connections are made with #8 terminal screws. The ability to handle electrical loads up to 25 Amps at high temperatures has made the Therm-O-Disc 49T a popular choice with heating and major appliance manufacturers.

Features and Benefits:

• Ceramic construction for high-temperature operation up to 550°F (288°C).

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

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

• Welded construction for integrity of current carrying components.

Switch Actions and Typical Applications:

The 49T 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. Once the temperature in the application has returned to the specified reset calibration, the switch will automatically return to its original state.

Typical uses of the Therm-O-Disc 49T include limiting or regulating temperatures in appliances and heating systems. This reliable, economical switch also provides temperature control in a variety of commercial and industrial applications. Airstream or surface mounting flanges are available with the 49T and are interchangeable with the Therm-O-Disc 60T series of temperature controls.

Mounting Brackets:

Airstream Mounting – In this mounting configuration, the bimetal disc sensing element protrudes through the mounting surface where the temperature being sensed is contained within an enclosure (air duct, heater box, etc.).

Surface Mounting – The surface mounting configuration positions the bimetal disc sensing element firmly against the mounting surface, thereby sensing the actual mounting surface temperature.