The core function of an overload protection switch (also known as an overload protector or overcurrent protection switch) is to automatically cut off the circuit when the temperature rises or the current exceeds the safety threshold due to excessive current in the circuit or equipment (such as overload, short circuit, locked-rotor, etc.), thus avoiding equipment damage, line burnout, and even fire hazards. Applicable scope: small household appliances, power strips, extension cords, UPS, PDU.