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Curious what this is
- Thread starter Tico
- Start date
It looks like a thermal fuse, a very large one. It senses temperatures and when a set temperature is reached it permanently blows its internal fuse. They're used to prevent fires caused by abnormal heat generation from circuits and other heat producing electrical products. They are a non-resettable thermal fuse which open electrical contacts when temperatures exceed the specified level. I just replaced one in my Bunn coffee pot. It sits directly on top of the internal reservoir that is constantly heated for instantly brewing and if it gets too hot it shuts everything off and requires a replacement thermal fuse.
http://www.dhresource.com/albu_188890700_00-1.0x0/microtemp-thermal-fuse-227c-240c-cut-off.jpg
Here is an example of a thermal fuse inside of an electric motor....
http://upload.wikimedia.org/wikipedia/commons/thumb/d/d4/Thermal-Fuse-CJC01.png/730px-Thermal-Fuse-CJC01.png
A compound inside the thermal fuse(blue section in picture below) holds a spring in place. When this compound melts, it allows the spring to move and lose contact...
http://www.cci-tco.com/sites/all/themes/cc1/images/sefuse2.jpg
http://www.dhresource.com/albu_188890700_00-1.0x0/microtemp-thermal-fuse-227c-240c-cut-off.jpg
Here is an example of a thermal fuse inside of an electric motor....
http://upload.wikimedia.org/wikipedia/commons/thumb/d/d4/Thermal-Fuse-CJC01.png/730px-Thermal-Fuse-CJC01.png
A compound inside the thermal fuse(blue section in picture below) holds a spring in place. When this compound melts, it allows the spring to move and lose contact...
http://www.cci-tco.com/sites/all/themes/cc1/images/sefuse2.jpg