Do You Really Understand Thermistors?

The electronic devices in life are all equipped with thermistors, which saves us from overheating, and the number of thermistors used in in-vehicle devices is countless.

When the thermistor is used as a resistance element, due to the applied voltage and current heating, the resistance value will also change with the change of temperature. Utilizing the functions of heating elements and temperature elements, thermistors are active in various applications such as temperature sensors, circuit protection, temperature compensation, etc., and are used for products such as smartphones and wearable terminals for various electronic devices and in-vehicle devices. Comes with rich features and shapes.

According to the different effects of temperature on resistance changes, thermistors are divided into the following two types.

The negative temperature coefficient (NTC) thermistor is an electronic component whose resistance value decreases with increasing temperature. Suitable for various products. The material of the Negative Temperature Coefficient (NTC) thermistor is ceramic fired from oxides of manganese (Mn), nickel (Ni), and cobalt (Co). This ceramic forms the electrode. Its appearance shape generally has a lead type, chip type, and so on.

Negative temperature coefficient (NTC) thermistor, the resistance value will change with the temperature change of 3~5%/℃. Often used as a general temperature sensor in electronic equipment. For example, a smartphone uses a negative temperature coefficient (NTC) thermistor to measure the temperature inside the smartphone and then uses this temperature information to control the temperature.

NTC thermistor has a rich series lineup:

• SMD type, high-reliability series and conductive adhesive compatible series for temperature detection, which can be used in vehicles;

• Generally use resin encapsulation series;

• Support soft lead type and lead type products for automotive equipment.

Thermistor Products

PTC thermistor

A positive temperature coefficient (PTC) thermistor is an electronic component that maintains a constant resistance value at room temperature. Once a certain temperature is exceeded, the resistance value will rise sharply. The resistance of the PTC thermistor increases with the increase of temperature, which can realize applications such as temperature detection and circuit current limiting.

The thermistor is made of ceramic materials with excellent reliability and performance. The complete product line not only covers different packaging forms (surface mount type, lead-through type), but also covers products for different applications, such as overcurrent protection, overheat protection, and surge current suppression applications.

PTC thermistor products are rich:

• Generally resin-encapsulated type for heating;

• SMD type supports overheat detection and overload current protection products for vehicle equipment;

• There are lead-type products for overload current protection that support vehicle equipment.

Thermistor products are widely used. LED lights, mobile phones, computers, refrigerators, electronic thermometers, vacuum cleaners, and other electronic devices in life are all installed with thermistors, which prevents us from overheating. Troubled. The number of thermistors used in in-vehicle devices is even more numerous.