Voltage and current of the transient disturbance is the main cause of the electronic circuit and equipment damage, often bring immeasurable loss.Usually these interference from the power equipment start-stop, ac power grid operation instability, lightning interference and electrostatic discharge, etc., the transient disturbance almost everywhere there is always, and make a person feel very small-scale operations.Fortunately, a kind of highly effective, the emergence of circuit protection devices, TVS TRANSIENT interference effectively inhibit TVS (TRANSIENT VOLTAGE SUPPRESSOR) or TRANSIENT VOLTAGE suppression diode is in stabilivolt technology developed on the basis of a new product, the circuit symbols and ordinary zener diode, same appearance also with ordinary diode, when TVS tube ends through instant high energy impact, it can at high speed (up to 1 * 10-12 seconds) impedance plummeted, to absorb a large current at the same time, will be the VOLTAGE between its terminals clamp on a predetermined value, to ensure that the back of the circuit components from TRANSIENT high-energy impact and damage.

TVS and zener voltage regulator tube can be regulated, but TVS diode zener current smaller, more than 10 v voltage regulator is only 1 ma, relatively to the large number of zener diode breakdown current, but the zener diode voltage regulation accuracy can do more.

Generally work in reverse in the circuit by the state, at this point it does not affect any function of the circuit.TVS in the regulation of reverse application conditions, when the circuit greatly because of the thunder and lightning, all kinds of electrical interference in the transient disturbance voltage or pulse current, it is in a very short period of time (maximum 1 x 10-12 seconds) to the quickly into the state, and the circuit voltage clamp on the safety of the numerical required, so as to effectively protect the electronic circuit in precision components from being damaged.Once the interference pulse of TVS and into reverse blocking state.Because when against wizard sense, the clamping voltage lower than the other device in the circuit of the high pressure, so the protection of other components.TVS can withstand the instantaneous pulse power to kw, the clamping time only 1 ps [1].TVS based on polarity can be divided into unidirectional and bidirectional TVS.One-way TVS generally applies to dc, two-way TVS generally applicable to ac circuits.Because the TVS protective action quickly, long service life, easy to use, so in the field of transient voltage protection has a very wide application.

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