(1/10)

001-07 / 20110926 / e9c11_avr.fm

• All specifications are subject to change without notice.

Varistors(SMD)

Countermeasure for Surge Voltage and Static Electricity

AVR Series AVR-M, AVRL Types

Varistors are voltage dependent nonlinear resistive elements with

a resistance that decreases rapidly when the voltage is over the

constant value.

Varistor is equivalent with Zener diode of two series connection.

Therefore, do not have polarity.

CURRENT vs. VOLTAGE CHARACTERISTICS

EQUIVALENT CIRCUIT

THE EFFECT OF THE VARISTOR

WITHOUT VARISTOR

A malfunction and failure of electronic equipment

WITH VARISTOR

Suppress abnormal voltage by inserting varistor in a circuit

Conformity to RoHS Directive

Chip varistor

Zener diode

/Vz:6.8V

Positive direction

Negative direction

Voltage(V)

2

14

18

2 Zener Diodes

A capacitance content

ESD, Surge voltage

Power line

Signal line

IC

ESD, Surge voltage

Power line

Signal line

Insert a varistor between

a line and ground

: Chip varistor

IC