Describe the function of a thermal cut-out in motor circuits.

The function of a thermal cut-out in motor circuits is to disconnect power if the temperature exceeds predefined limits. This safety device is crucial for protecting the motor from overheating, which can lead to insulation breakdown, premature failure, or even fire hazards. When the temperature within the motor increases due to prolonged operation under heavy load or other malfunctions, the thermal cut-out senses this rise in temperature and activates to break the circuit, effectively stopping the power supply to the motor. This action helps to prevent damage and ensures the longevity of the motor by allowing it to cool down before it can be safely restarted.

Understanding this functionality highlights the importance of thermal management in electrical equipment, aiding in the protection of both the motor itself and the overall system in which it operates.