P4802ACMC datasheet(174/212 Pages) TECCOR

174 / 212 page

Overvoltage Protection Comparison

http://www.teccor.com

5 - 12

+1 972-580-7777

SIDACtor® Data Book and Design Guide

TVS Diodes

Transient Voltage Suppressor (TVS) diodes are clamping voltage suppressors that are

constructed with back-to-back PN junctions. During conduction, TVS diodes create a low

impedance path by varying their resistance as voltage is applied across their terminals.

Once the voltage is removed, the diode will turn off and return to its high off-state

impedance.

Advantages

Because TVS diodes are solid state devices, they do not fatigue nor do their electrical

parameters change as long as they are operated within their specified limits. TVS diodes

effectively clamp fast-rising transients and are well suited for low-voltage applications that

do not require large amounts of energy to be shunted.

Restrictions

Because TVS diodes are clamping devices, they have two inherent weaknesses. First, TVS

diodes are both voltage- and current-limited, so careful consideration should be given to

using these in applications that require large amounts of energy to be shunted. Secondly,

as the amount of current flowing through the device increases, so does its maximum

clamping voltage.

Applications

Due to their low power ratings, TVS diodes are not used as primary interface protectors

across Tip and Ring; they are used as secondary protectors that are embedded within a

circuit.

P4802ACMC 데이터시트(PDF) 174 Page - Teccor Electronics