This is a replacement 175C thermal cut out switch for the BrewZilla units. This particular unit is a 175C thermal cut out switch/overload.

Previous Gen 1 and Gen 2 models sold under the name RoboBrew used a 110V and 121C and 135C switch which triggered slightly too early so all the new Gen 3 BrewZilla units now use this 175C thermal cut out switch which seems to work much more reliably. 

This thermal cut out switch is mounted directly to the heating element so as soon as the heating element get too hot the bi-metal switch will activate and cut the power to the element. It can also trigger an E3 or E4 error when this happens on the display.

This can be used with 35L Gen 3 Brewzilla