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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.
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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 series (8 to 39V). Low capacitance items are available in series (3.3pF to). World’s smallest 0603-type, 1005-, 1608-, 2012-chip types and 1410-array type are available in series. • Excellent mount reliability. Good for Pb-free soldering. Adopted (Ni/Sn) electroplating. Achieved good solderability and solder heat resistance. • Can replace a Zener diode + capacitor combination. Reduced footprint and total mounting cost.
INTERNAL STRUCTURE
Inner electrode
Varistor body
(Palladium) (Zinc Oxide: ZnO semiconductor ceramics)
Sn plating
Ag termination underlayer
Ni plating
CIRCUITS SINGLE TYPE
ARRAY TYPE
OPERATIONAL VOLTAGE RANGES
APPLICATIONS • Electrostatic absorption • Pulse noise absorption
TEMPERATURE RANGES
Type Operating Storage
AVR-M1005/1608/2012 –40 to +125°C –40 to +125°C
AVR-M14A2/0603/AVRL –40 to +85°C –40 to +85°C
APPLICATION EXAMPLES
Consumer product Mobile phone Digital video camera Digital camera PDA Note PC DVD-ROM, CD-ROM CD/MD/MP3 player Game machine
In-car equipment
Application
Data terminal LCD panel Touch panel Button and switch unit Battery terminal Audio-Video input-output terminal Microphone/receiver unit Controller unit
CAN-BUS ECU Connector Air conditioner panel Car audio Car navigation
0603 type 1005 type 1608 type 2012 type 1410 type
0
6.5 15 19
16 5 10 15 20
Circuit voltage(V)
28 25 30
RECOMMENDED REFLOW SOLDERING CONDITIONS
260˚C max. 250˚C 220˚C
10s max.
Natural cooling
180˚C 150˚C
Preheating 60 to 120s
Time(s)
Soldering 60s max.
• All specifications are subject to change without notice.
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AVR-M TYPE PRODUCT IDENTIFICATION AVR-M 1005 C 270 M T AAB
(1) (2) (3) (4) (5) (6) (7)
(1) Series name
(2) Dimensions L× W
0603 1005
0.6× 0.3mm 1.0× 0.5mm
1608 2012
1.6× 0.8mm 2.0× 1.2mm
14A2
1.4× 1.0mm (2-element)
(3) Structure code
(4) Varistor voltage 270 27× 100V
(5) Varistor voltage tolerance K ±10% M ±20%
(6) Packaging style T B
Taping Bulk
(7) Capacitance and TDK internal code
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SHAPES AND DIMENSIONS/RECOMMENDED PC BOARD PATTERN 0603/1005/1608/2012 TYPES
L
TW
B
Type
0603 1005 1608 2012
L
0.6±0.03 1.0±0.05 1.6±0.1 2.0±0.2
W
0.3±0.03 0.5±0.05 0.8±0.1 1.25±0.2
T
0.3±0.03 0.5±0.05 0.8±0.1 1.0±0.2
Dimensions in mm
B min.
Weight (mg)typ.
0.1 0.2
0.1 1.2
0.2 5
0.2 15
c
bab
Type 0603 1005 1608 2012
a 0.25 to 0.35 0.3 to 0.5 0.6 to 0.8 0.9 to 1.2
1410 TYPE
1.37±0.2
b 0.2 to 0.3 0.35 to 0.45 0.6 to 0.8 0.7 to 0.9
Dimensions in mm
c 0.25 to 0.35 0.4 to 0.6 0.6 to 0.8 0.9 to 1.2
0.2typ. 1.0±0.2
0.36±0.2
0.6max.
0.32±0.2 0.64typ.
Weight: 4mg typ. Dimensions in mm
0.35 to 0.45 0.65 to 0.95
1.0 to 1.4
0.6 to 0.66 0.3 to 0.4
Dimensions in mm
• All specifications are subject to change without notice.
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ELECTRICAL CHARACTERISTICS
Part No.
0603 type AVRM0603C6R8N ∗101N AVRM0603C080M 101N AVRM0603C120M 101N AVR-M0603C120M AAB 1005 type AVRM1005C6R8N 101N AVR-M1005C080M AAB AVR-M1005C080M ADB AVR-M1005C080M ABB AVR-M1005C080M ACB AVR-M1005C120M AAB AVRM1005C270K 101N AVR-M1005C270M AAB AVR-M1005C270M ABB 1608 type AVR-M1608C080M AAB AVR-M1608C120M 6AB AVR-M1608C120M 2AB AVR-M1608C180M 6AB AVR-M1608C220K 6AB AVR-M1608C220K 2AB AVR-M1608C270K 6AB AVR-M1608C270K 2AB AVR-M1608C270M ACB AVR-M1608C270M AAB AVR-M1608C270M ABB AVRM1608C390K 271N 2012 type AVR-M2012C120M 6AB AVR-M2012C220K 6AB AVR-M2012C390K 6AB 1410 type AVR-M14A2C240M 600N AVR-M14A2C270M 470N AVRM14A2C270M 150N AVRM14A2C270M 3R3F
V.