Analysis of the difference between resistance and TVs tube

The resistor is a resistive device with a non-linear volt-ampere characteristic, most of which is protected by voltage circuitry when the circuit is under overvoltage and absorbs excess current to protect the sensitive device. Usually called VDR. The resistor body material of the resistor is a semiconductor, so it is one of the semiconductor resistors.

TVS (diodes), also called TVs Tubes , are widely used as a new type of efficient circuit protection device with fast reflection time and very high surge absorption characteristics. When both ends are subjected to an instantaneous high-capacity impact, the TVs tube is able to move the impedance values between the ends at very high speeds by

The high impedance changes to a low resistance to absorb an instantaneous large current.

What is the difference between a resistor and a TVs tube ?

1, the resistance has small size, does not occupy the place, the low cost factor. The TVs tube has a weak power limit and a higher price.

2, the non-linear characteristics of TVs and zener diodes, the leakage current is very small before breakdown, after breakdown is the standard voltage characteristics, than the varistor to TVs tube maximum power limit voltage deviation from the breakdown voltage is small, better than the varistor, but the flow characteristics of less than resistance.

3, the resistance of high reliability, not easy deterioration, long service life. The reliability of TVs tube is poor, it is easy to be aged and the service life is short.

4, the resistance can accept greater inrush current, and the larger the volume of the surge current can be assumed, the maximum can be up to dozens of K amps to hundreds of K amperes, but the non-linearity of the varistor is poor, high current limit voltage is higher, low voltage leakage current is larger.

5, from the response rate,TVs tube response speed, for the PS class, and the Varistor reaction speed is slower, NS grade. In addition, the resistors and TVs tubes have larger capacitance.

Analysis of the difference between resistance and TVs tube