© 2014 Littelfuse, Inc.
51
Revised: January 16, 2014
Varistor Products
MLA Automotive Varistor Series
Surface Mount Multilayer Varistors (MLVs) > MLA Automotive Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html or MLA.html for current information.
MLA Automotive Series
Device Characteristics
At low current levels, the V-I curve of the multilayer
transient voltage suppressor approaches a linear (ohmic)
relationship and shows a temperature dependent effect.
6
Ω at its
µµA.
100%
1E
-9
1E
-8
SUPPRESSOR CURRENT (A
DC
)
10%
1E
-7
1E
-6
1E
-5
1E
-4
1E
-3
1E
-2
25 50 75 10 0
125
o
C
SUPPRESSOR VOLTAGE IN PERCENT OF
V
NOM
VALUE AT 25
o
C (%)
FIGURE 10. TYPICAL TEMPERATURE DEPENDANCE OF THE CHARACTERISTIC
CURVE IN THE LEAKAGE REGION
o
oo
o
Clamping Voltage Over Temperature (V
C
at 10A)
100
10
20
V26MLA1206
40 60 80 100120 140
TEMPERATURE (
o
C)
V5.5MLA1206
0-20-40-60
FIGURE 12. CLAMPING VOLTAGE OVER TEMPERATURE
(V
C
AT 10A)
Speed of Response
The Multilayer Suppressor is a leadless device. Its response
time is not limited by the parasitic lead inductances found
in other surface mount packages. The response time of
the Z
ESD. Additionally, in "real world" applications, the associated
circuit wiring is often the greatest factor effecting speed of
response. Therefore, transient suppressor placement within
a circuit can be considered important in certain instances.
GRAINS
DEPLETION
FIRED CERAMIC
DIELECTRIC
REGION
METAL
ELECTRODES
DEPLETION
REGION
METAL END
TERMINATION
FIGURE 11. MULTILAYER INTERNAL CONSTRUCTION
Multilayer Internal Construction
Energy Absorption/Peak Current Capability
Energy dissipated within the MLA Automotive Series is
calculated by multiplying the clamping voltage, transient
current and transient duration. An important advantage of
the multilayer is its interdigitated electrode construction
within the mass of dielectric material. This results in
grains combine to absorb and distribute transient energy
reliability.
As a measure of the device capability in energy and peak
current handling, the V26MLA1206 part was tested with
µs). At
the end of the test,10,000 pulses later, the device voltage
characteristics are still well within specification.
100
10
0
V26MLA1206
2000 4000 6000 8000 10000 12000
NUMBER OF PULSES
VO LTAG E
FIGURE 13. REPETITIVE PULSE CAPABILITY
PEAK CURRENT = 3A
8/20 s DURATION, 30s BETWEEN PULSES
Figure 8
Figure 9
Figure 10
Figure 11
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