These Firestat/High Limits are installed in air ducts to shut down heating, air conditioning and ventilation equipment when air temperature in duct exceeds a pre-set limit.

The Models TC-108, TC-105 and TC-100 Duct High Temperature Limits feature a helix bimetal element that senses rapid increases in duct temperature, such as those caused by fire. The high temperature limit then operates an SPST switch that opens with a rise in temperature. A manual reset button reactivates the temperature limit after the high-temperature condition has cleared. These duct high temperature limits are indispensable in specialized HVAC applications and Building Automation Systems. These Firestat models are field adjustable with a temperature range of 100°-250°F.  The Models TC-205 Duct High Temperature Limits are Fixed Temp with a 5″ insertion element.

View Specifications

Part Number Description Range Factory Set Switch Action
TC1001A3C Manual Rest, Adjustable Temperature w/ 11″ Element 100°-250°F 125°F Open on Rise
TC1081A3C Manual Rest, Adjustable Temperature w/ 7.5″ Element 100°-250°F 125°F Open on Rise
TC1051A3C Manual Rest, Adjustable Temperature w/ 5″ Element 100°-250°F 125°F Open on Rise
TC2051A1253C18 (4PU53) Manual Rest, Fixed Temperature 5″ Element 125°F 125°F Open on Rise
TC2051A1653C18 (4PU54) Manual Rest, Fixed Temperature 5″ Element 165°F 165°F Open on Rise
TC2051A2003C18 (4PU55) Manual Rest, Fixed Temperature 5″ Element 200°F 200°F Open on Rise