PTC Thermistors

PTC (Positive Temperature Coefficient) thermistors are temperature-sensitive resistors that are used as sensors in a wide range of applications. PTC thermistors are made from a special type of ceramic material that has a positive temperature coefficient, meaning that the resistance of the thermistor increases as the temperature increases. This allows PTC thermistors to be used as temperature-sensitive switching devices. PTC thermistors are commonly used in overcurrent protection applications, such as in fuses and circuit breakers. When the current flowing through a PTC thermistor exceeds a certain level, the temperature of the thermistor will rise, causing its resistance to increase. This will limit the current flowing through the thermistor, protecting the circuit from damage due to overcurrent. PTC thermistors are also used in temperature sensing and control applications, such as in HVAC (heating, ventilation, and air conditioning) systems, refrigerators and freezers, and automotive systems. They are known for their high accuracy, fast response time, and durability, making them suitable for use in a variety of applications.