automatic cutoff
nounUK /ˌɔːtəˈmætɪk ˈkʌtɒf/
US /ˌɔːtəˈmætɪk ˈkʌtɔːf/
A machine part that stops something by itself when a limit is reached.
The automatic cutoff turned off the heater when it got too hot.
OTHER MEANINGS
2. A point where something ends on its own without a person doing it.
The automatic cutoff for ticket sales is midnight.
3. A device that stops the flow of water, gas, or power by itself.
The automatic cutoff saved the house from flooding.
4. A rule that stops a process when a certain amount is reached.
There is an automatic cutoff on the data plan after ten gigabytes.