
5-9
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 affect (Figure 8). At or
below the maximum working voltage, the suppressor is in a
high resistance mode (approaching 10
6
at its maximum
rated working voltage). Leakage currents at maximum rated
voltage are below 50
μ
A, typically 25
μ
A.
When clamping transients at and above the 10mA range, the
multilayer suppressor approaches a 1
-10
characteristic.
Here, the multilayer becomes virtually temperature
independent (Figure 9).
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 packaging. The response time of the
Zinc Oxide dielectric material is less than 1 nanosecond and
the ML 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. V18MLA1210 TO V120MLA1210 MAXIMUM V-I CHARACTERISTIC CURVES
Maximum Transient V-I Characteristic Curves
(Continued)
1mA
1000
100
10
100nA
1
μ
A
CURRENT (I)
M
10
μ
A
100
μ
A
10mA
100mA
1A
10A
100A
1000A
MAXIMUM CLAMP
VOLTAGE
V18MLA1210
T
A
= 25
o
C
V18MLA1210 TO V120MLA1210 V
M(AC)
RATING
MAXIMUM
LEAKAGE
V48MLA1210, V48MLA1210L
V30MLA1210, V30MLA1210L
V26MLA1210
V60MLA1210
V85MLA1210
V120MLA1210
100
10
-9
10
-8
SUPPRESSOR CURRENT (A
DC
)
10
10
-7
10
-6
10
-5
10
-4
10
-3
10
-2
20
30
50
60
80
40
25
50
75
100
125
o
C
S
V
N
o
C
FIGURE 8. TYPICAL TEMPERATURE DEPENDENCE OF THE CHARACTERISTIC CURVE IN THE LEAKAGE REGION
ML Series