V o lt ag e Pr otec t i o n D e v i c e s
July 2019
Cl
Pb
Br
REACH Halogen Lead
RoHS
SVHC-Free Free Free
Chip varistors
Voltage Protection Devices
Automotive grade
AVR series
AVRM, AVR-M series
AVRM1608/AVR-M1608 JIS 1608 [EIA 0603]
AVRM2012/AVR-M2012 JIS 2012 [EIA 0805]
AVRL series
AVRL10 JIS 1005 [EIA 0402]
AVRL16 JIS 1608 [EIA 0603]
AVRH series
AVRH10 JIS 1005 [EIA 0402] (2/14)
Voltage Protection Devices
Product compatible with RoHS directive
Chip varistors
Compatible with lead-free solders
AEC-Q200
Automotive grade
Overview of the AVR series
CHARACTERISTICS OF CHIP VARISTOR EQUIVALENT CIRCUIT OF CHIP VARISTORS
Varistors are voltage dependent nonlinear resistive elements with
2 Zener Diodes
a resistance that decreases rapidly when the voltage is over the
constant value.
Varistors become zener diode of 2 serial connection and equiva-
A capacitance content
lent, and does not have polarity.
CHIP VARISTORS FEATURE FOR AUTOMOTIVE
CURRENT vs. VOLTAGE CHARACTERISTICS
GRADE
1
10
Zener diode
2 Reliability characteristics evaluated based on AEC-Q200 con-
10
/Vz:6.8V
3
10
Chip varistor
Positive direction dition.
/V1mA:12V
4
10
High ESD withstanding voltage
5
10
Small-sized products are available
18 14 10 61262 0 14 18
5
125C, 150C Supported
10
4
10
3 Negative direction
10
Figure 1 internal structure of multilayer chip varistors
2
10
1
10
( )
Voltage V
THE EFFECT OF THE VARISTOR
Without varistor
A malfunction and failure of electronic equipment
ESD, Surge voltage
Power line
IC
Signal line
With Varistor
Suppress transient voltage by inserting varistor in a circuit
ESD, Surge voltage
No. Name
(1) Semiconductor ceramic
(2) Internal electrode(Pd)
(3) Ag
(4) Terminal electrode Ni
Power line
IC
(5) Sn
Signal line
Insert a varistor between
a line and ground
: Chip varistor
20190704 / vpd_automotive_varistors_avr_en.fm
Current(A)