PTCtermistoroj

PTC termistoroj, also known as positive temperature coefficient thermistors, are a type of resistor whose resistance increases significantly with an increase in temperature. This characteristic makes them valuable in various electronic applications for temperature sensing and protection. The primary material used in PTC thermistors is typically a ceramic or polymer composite. As the temperature rises, the material undergoes a phase transition or structural change that dramatically alters its electrical conductivity. Above a specific switching temperature, the resistance value can increase by several orders of magnitude.

PTC thermistors are commonly employed as resettable fuses or overcurrent protection devices. When excessive current flows through the device, it heats up, causing its resistance to surge. This increased resistance then limits the current flow, protecting the circuit from damage. Once the fault condition is removed and the device cools down, its resistance returns to a low state, and the circuit can resume normal operation. They are also used in self-regulating heating applications, where their inherent temperature-dependent resistance can maintain a stable temperature without external control circuitry. Other uses include temperature measurement, inrush current limiting, and liquid level sensing. Their reliability and resettable nature make them a cost-effective and practical solution in many electronic designs.