Question 1: What is a PPTC ?

PPTC is an overcurrent protection component, also known as a polymeric positive temperature coefficient thermistor. It is made from a high-molecular organic polymer mixed with conductive particle materials under high pressure, high temperature, and vulcanization conditions, processed through special techniques. It is primarily used for overcurrent and short-circuit protection, with the key advantage of being reusable, thereby reducing maintenance costs.