Varistors
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Varistors(SMD) Countermeasure for Surge and Static Electricity
Conformity to RoHS Directive
AVR Series AVR-M, ...
Description
(1/10)
Varistors(SMD) Countermeasure for Surge and Static Electricity
Conformity to RoHS Directive
AVR Series AVR-M, AVRL Types
Varistor (Variable resistor) is a nonlinear resistive element of the voltage dependence that resistance changes with applied voltage. Varistor is equivalent with Zener diode of two series connection. Therefore, do not have polarity.
CURRENT vs. VOLTAGE CHARACTERISTICS
Current(A)
Positive direction
10–1 10–2 10–3
Zener diode /Vz:6.8V
10–4
10–5
Chip varistor /V1mA:12V
–18 –14 –10 –6 –2 2 6 –10–5
10 14 18
–10–4
–10–3 Negative direction
–10–2
–10–1
Voltage(V)
EQUIVALENT CIRCUIT
2 Zener Diodes
A capacitance content
THE EFFECT OF THE VARISTOR WITHOUT VARISTOR A malfunction and failure of electronic equipment
ESD, Surge voltage
WITH VARISTOR Suppress abnormal voltage by inserting varistor in a circuit
ESD, Surge voltage
Power line Signal line
IC ICPower line Signal line
Insert a varistor between a line and ground
: Chip varistor
All specifications are subject to change without notice.
004-01 / 20071227 / e9c11_avr.fm
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FEATURES No polarity, due to symmetrical current-voltage characteristics.
Equivalent to anode common type Zener diode. Excellent electrostatic absorption capability.
Response is as good or better than Zener diode. Keeps symmetrical current-voltage characteristics even after electrostatic absorption. Adopted the inner electrodes lamination structure. Wide range of varistor voltages are available in se...
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