When a constant voltage is applied to a ceramic semiconductor, the resistance value is constant up to a certain temperature, and when it exceeds that, the resistance value rises sharply and limits the current. At the moment when the voltage is applied, the resistance value is low and a large current flows, so the water temperature can be raised quickly.

A safe and secure heater that does not have to worry about fire.
Since it is a low temperature heating element that automatically adjusts the temperature as if it includes a heater and a thermostat, it automatically controls the current even in the unlikely event of an empty fire, and the surface temperature does not exceed a certain level. There is no need to worry about fire.
Therefore, it is a safe underwater heater that boils quickly and does not have to worry about fire.
UCAN manufactures steam humidifier products incorporating PTC submersible heaters by taking advantage of the above characteristics.