V18MLE1206T Littelfuse Inc, V18MLE1206T Datasheet - Page 3

• Manufacturer Part Number: V18MLE1206T
• Description: VARISTOR TVS ESD 18V SMD 1206
• Manufacturer: Littelfuse Inc
• Series: MLEr

Specifications of V18MLE1206T

• Varistor Voltage: 28V
• Number Of Circuits: 1
• Maximum Dc Volts: 18VDC
• Package / Case: 1206 (3216 Metric)
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS Compliant
• Energy: -
• Current-surge: -
• Maximum Ac Volts: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/MLE.html for current information.
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.
At or below the maximum working voltage, the suppressor
is in a high resistance model (approaching 10
maximum rated working voltage). Leakage currents at
maximum rated voltage are below 100μ
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
than 1ns and the MLE can clamp very fast dV/dT events
such as 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.
Figure 7
Figure 5
TERMINATION
Typical Temperature Dependance of the Haracteristic
100%
METAL END
10%
1E
-9
FIRED CERAMIC
DIELECTRIC
1E
Multilayer Internal Construction
-8
25
o
50
DEPLETION
DEPLETION
o
1E
REGION
REGION
75
-7
μ
o
SUPPRESSOR CURRENT (A
100
o
1E
N
125
-6
o
C
1E
-5
μA.
DC
GRAINS
1E
)
Varistor Products
-4
Surface Mount Multilayer Varistors (MLVs) > MLE Series
METAL
ELECTRODES
6
Ω at its
1E
-3
1E
μA;
-2
Revision: July 16, 2009
33
Clamping Voltage Over Temperature (V
Energy Absorption/Peak Current Capability
Energy dissipated within the MLE 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 excellent
current distribution and the peak temperature per energy
absorbed is very low. The matrix of semiconducting grains
combine to absorb and distribute transient energy (heat)
temperature; thermal stresses and enhances device
reliability.
As a measure of the device capability in energy and peak
current handling, the V26MLA1206A part was tested with
the end of the test, 10,000 pulses later, the device voltage
characteristics are still well within specification.
Figure 8
Figure 6
100
10
100
0
10
PEAK CURRENT = 150A
8/20 s DURATION, 30s BETWEEN PULSES
-60
-40
2000
-20
4000
0
TEMPERATURE (
NUMBER OF PULSES
20
6000
40
60
o
C)
C
8000
at 10A)
V26MLA1206
V5.5MLA1206
80
V26MLA1206
100
10000
MLE Varistor Series
120
140
μs). At
12000