The L117 Series is a manual reset type and fixed temperature device
used for safety to prevent overheating.
If the primary regulator loses its function, the L117 protects the device by
disconnecting power at the secondary set temperature.
As a fail-safe product, it automatically shuts off the switch in the case of
capillary damage or leakage. There are also the Manual Reset Type LB117 Series
and the Automatic Reset Type LC117 Series.