What is the difference between varistor and thermistor?

Pressure sensitive resistor as a kind of common electronic components, is in the process of the usual circuit design engineers familiar with accessories. In addition, there is a kind of electronic components and we normally used to, that is thermal resistor. Thermistor and piezoresistor name similar, so are the functions of both alike? What are the differences between them? Let us explain what is the difference between them.

Start with the thermistor. We usually use the thermistor is divided according to the temperature coefficient, it belongs to the temperature sensitive element, in the usual use process, thermal resistor is divided into positive temperature thermistor and negative temperature thermistor two types, but the two resistors are belong to the semiconductor device.

Then look at the definition of an inhaler sensitive resistor and the application situation. From the point of name, we don't see definition can also know its application characteristics, that is sensitive to voltage. It itself is a typical nonlinear volt-ampere characteristics, also in the process of the usual circuit design is mainly used for the voltage clamping circuit withstand overvoltage, absorb the excess current, in order to protect sensitive components. Pressure sensitive resistor of resistance material is a semiconductor, so it is also a variety of semiconductor resistor.

In understanding the definition of pressure sensitive resistor and thermistor and range of application, the next let's see what is the actual difference between the two. First of all, both in the circuit design of symbol mark, symbol is PTC thermistor, and pressure sensitive resistor is the symbol of VSR, this is also in the circuit design of the most obvious way to distinguish between them. Second, the packaging color is also different, common thermistor appearance is black, and a common encapsulation of piezoresistor appearance is blue. After the command of the two kinds of way to distinguish, believe that each new engineers in the later work, must not will confuse them.