Transient voltage suppressor (TVS) is a high-performance protection device in the form of diode. When the two poles of TVS diode are impacted by the reverse transient high energy, it can change the high impedance between the two poles into low impedance at a speed of the order of 10 minus 12 power seconds, absorb the surge power up to several kilowatts, clamp the voltage between the two poles at a predetermined value, effectively protect the precision components in the electronic circuit from various surge pulses.
What is the principle of TVS Diode
TVs tubes are used to suppress transient surges and are connected in parallel with the protected devices.
Under normal working conditions, TVs is in high impedance state to the protected line. When the instantaneous voltage exceeds its breakdown voltage, TVs will provide a path with low impedance to the instantaneous current.
So that the instantaneous current flowing to the protected component is diverted to the TVS diode and the voltage across the protected component is limited to the clamping voltage across the TVs.
What are the characteristics of TVs diodes?
Its characteristics are: the response speed is particularly fast (ns level); the surge impact resistance is worse than that of the discharge tube and the varistor; its 10 / 1000US wave pulse power is from 400W to 30kW, and the pulse peak current is from 0.52a to 544A; The breakdown voltage has a series of values from 6.8v to 550V, which is convenient for circuits with different voltages.
How to classify TVs diodes?
TVs devices can be divided into unipolar and bipolar devices according to polarity, and can be divided into general-purpose devices applicable to various circuits and special-purpose devices applicable to special circuits according to purpose. Such as: various AC voltage protectors, 4 ~ 200mA current protectors, data line protectors, coaxial cable protectors, telephone protectors, etc. According to the package and internal structure, it can be divided into axial lead diode, dual in-line TVS Array (applicable to multi line protection), chip type, component type and high-power module type.
