This is a temprature controlled relay, you can set the relay on/off when the temprature is higher/lower than the temprature you set.The peak voltage capability is up to 250V at 10A when AC and 30V at 10A when DC. With this module, it will be much more easyto implement applications that needs auto power up/down with the temprature varies.
Adjust the on-board potentiometer to adjust the sensitivity. The relay and the signal indicate LED would ON/OFF when the temperature is higher/lower than the threshold set by the potentiometer.
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