Thermal Cut Out Symbol

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Thermal cut out symbol.

The term thermal cutoff switch generally refers to how the switch is used ie. A single use device that cannot be reset and must be replaced when it fails or is triggered a thermal fuse is used when the overheating is a result of a rare occurrence such as failure requiring. Thermal fuse 10a 250v 228c 442f 480. Use scheme it s comprehensive electronic symbol library and an integrated digi key component catalog to design and share electronic circuit diagrams.

Check out the latest parts added to digi key s massive inventory of electronic components. Fuses are devices containing a small piece of special wire that melts when the intensity of the current flowing through it for a certain period of time exceeds a set value thus protecting the rest of the electrical circuit overloads. Thermal protectors can also be built into the windings see the illustration below. Fuses and electrical protection symbols.

The applications of and need for electromechanical thermal switch devices are broad and cover a huge diversity of industry applications. In single phase motors up to a given motor size around 1 1 kw it can be mounted directly in the main circuit to serve as an on winding protector. It cuts off the current to critical machinery when a temperature limit is exceeded preventing potential burn out or failure.