Epoxy resin encapsulation style is used in medium and low temperature environments and has good long-term stability

In the modern electronics industry, thermistors, as an important temperature sensor, are widely used in temperature measurement, temperature control, over-temperature protection and other fields. Among them, epoxy resin encapsulated thermistors stand out in many application scenarios with their unique packaging form and excellent performance. This article will introduce the working principle, characteristics, application and manufacturing process of epoxy resin encapsulated thermistors in detail, in order to provide reference for practitioners in related fields.

1. Working principle

Thermistor is a sensor that works based on the principle that the resistance of a material changes significantly with temperature. Depending on the material, thermistors can be divided into two categories: positive temperature coefficient thermistors (PTC) and negative temperature coefficient thermistors (NTC). The resistance value of NTC thermistors decreases when the temperature rises, while the resistance value of PTC thermistors increases when the temperature rises. Epoxy resin encapsulated thermistors usually use NTC materials because they are more sensitive to temperature changes.

As an encapsulation material, epoxy resin not only has good insulation and chemical stability, but also can effectively protect the thermistor core from erosion by the external environment, such as moisture, dust and mechanical shock. Epoxy resin encapsulation makes thermistors more reliable and have a longer service life.

II. Features

1. **High precision**: Epoxy resin encapsulated thermistors adopt precision manufacturing technology, which can achieve high temperature measurement accuracy and meet the needs of precision measurement and control.

2. **Fast response**: Due to the high sensitivity of thermistor materials themselves and the good thermal conductivity of epoxy resin encapsulation, this type of sensor can respond quickly to temperature changes and realize real-time temperature monitoring.

3. **Good stability**: Epoxy resin encapsulation effectively isolates the influence of the external environment on the thermistor core, improving the long-term stability and reliability of the product.

4. **Small size and light weight**: Epoxy resin encapsulation process makes the thermistor small in size, easy to integrate into various electronic devices, while reducing the overall weight.

5. **Good encapsulation protection**: Epoxy resin encapsulation can not only prevent the intrusion of pollutants such as moisture and dust, but also provide a certain mechanical strength to protect the thermistor from physical damage.