Multilayer Transient Voltage Surge Suppressors
ML Varistor Series
Surface Mount Varistors
140
w w w . l i t t e l f u s e . c o m
The ML Series family of Transient Voltage Surge Suppression devices is
based on the Littelfuse Multilayer fabrication technology. These compo-
nents are designed to suppress a variety of transient events, including
those specified in IEC 61000-4-2 or other standards used for Electromagnetic
Compliance (EMC). The ML Series is typically applied to protect integrated
circuits and other components at the circuit board level.
The wide operating voltage and energy range make the ML Series suit-
able for numerous applications on power supply, control and signal lines.
The ML Series is manufactured from semiconducting ceramics, and is
supplied in a leadless, surface mount package. The ML Series is compat-
ible with modern reflow and wave soldering procedures.
It can operate over a wider temperature range than zener diodes, and
has a much smaller footprint than plastic-housed components.
Littelfuse Inc. manufactures other Multilayer Series products. See the
MLE Series data sheet for ESD applications, MHS Series data sheet for
high-speed ESD applications, the MLN for multiline protection and the
AUML Series for automotive applications.
Features
Leadless 0402, 0603, 0805, 1206 and 1210 Chip Sizes
Multilayer Ceramic Construction Technology
-55
o
C to +125
o
C Operating Temperature Range
Operating Voltage Range VM(DC) = 5.5V to 120V
Rated for Surge Current (8 x 20s)
Rated for Energy (10 x 1000s)
Inherent Bi-directional Clamping
No Plastic or Epoxy Packaging Assures Better than 94V-0
Flammability Rating
Standard Low Capacitance Types Available
Applications
Suppression of Inductive Switching or Other Transient Events Such
as EFT and Surge Voltage at the Circuit Board Level
ESD Protection for Components Sensitive to IEC 61000-4-2,
MIL-STD-883C Method 3015.7, and Other Industry Specifications
(See Also the MLE or MLN Series)
Provides On-Board Transient Voltage Protection for ICs and Transistors
Used to Help Achieve Electromagnetic Compliance of End Products
Replace Larger Surface Mount TVS Zeners in
Many Applications
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Absolute Maximum Ratings
For ratings of individual members of a series, see Device Ratings and Specifications table.
Continuous:
Steady State Applied Voltage:
DC Voltage Range (VM(DC)). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5 to 120
V
AC Voltage Range (VM(AC)RMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 to 107
V
Transient:
Non-Repetitive Surge Current, 8/20s Waveform, (ITM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 to 500
A
Non-Repetitive Surge Energy, 10/1000s Waveform, (WTM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.2 to 2.5
J
Operating Ambient Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to + 125
O
C
Storage Temperature Range (TSTG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to + 150
O
C
Temperature Coefficient (
V) of Clamping Voltage (VC) at Specified Test Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0.01
%/
O
C
Device Ratings and Specifications
ML SERIES UNITS
PART
NUMBER
MAXIMUM RATINGS (125
o
C)
SPECIFICATIONS (25
o
C)
MAXIMUM
CONTINUOUS
WORKING
VOLTAGE
MAXIMUM
NON-
REPETITIVE
SURGE
CURRENT
(8/20
s)
MAXIMUM
NON-
REPETITIVE
SURGE
ENERGY
(10/1000
s)
MAXIMUM
CLAMPING
VOLTAGE AT
10A
(OR AS NOTED)
(8/20
s)
NOMINAL VOLTAGE
AT 1mA DC TEST
CURRENT
TYPICAL
CAPACITANCE
AT f = 1MHz
V
M(DC)
V
M(AC)
I
TM
W
TM
V
C
V
N(DC)
MIN
V
N(DC)
MAX
C
(V)
(V)
(A)
(J)
(V)
(V)
(V)
(pF)
V3.5MLA0603
3.5
2.5
30
0.1
10 at 2A
3.7
7.0
1100
V3.5MLA0805
3.5
2.5
120
0.3
10 at 5A
3.7
7.0
2200
V3.5MLA0805L
3.5
2.5
40
0.1
10 at 2A
3.7
7.0
1200
V3.5MLA1206
3.5
2.5
100
0.3
14
3.7
7.0
6000
V5.5MLA0402
5.5
4.0
20
0.050
15.5 at 1A
7.1
9.3
220
V9MLA0402
9
6.5
20
0.050
22 at 1A
11
14
120
V9MLA0402L
9
6.5
4
0.020
25 at 1A
11
14
33
V14MLA0402
14
10
20
0.050
30 at 1A
15.9
20.3
70
V5.5MLA0603
5.5
4.0
30
0.1
15.5 at 2A
7.1
9.3
660
V5.5MLA0805
5.5
4.0
120
0.3
15.5 at 5A
7.1
9.3
1600
V5.5MLA0805L
5.5
4.0
40
0.1
15.5 at 2A
7.1
9.3
860
V5.5MLA1206
5.5
4.0
150
0.4
15.5
7.1
9.3
4500
V9MLA0603
9.0
6.5
30
0.1
23 at 2A
11.0
16.0
420
V9MLA0805L
9.0
6.5
40
0.1
20 at 2A
11
14
450
V12MLA0805L
12
9.0
40
0.1
25 at 2A
14
18.5
350
V14MLA0603
14
10
30
0.1
30 at 2A
15.9
20.3
150
V14MLA0805
14
10
120
0.3
30 at 5A
15.9
20.3
480
V14MLA0805L
14
10
40
0.1
30 at 2A
15.9
20.3
270
V14MLA1206
14
10
150
0.4
30
15.9
20.3
1600
NEW
NEW
NEW
NEW
ML Varistor Series
Surface Mount Varistors
Multilayer Transient Voltage Surge Suppressors
141
w w w . l i t t e l f u s e . c o m
3
SURF
A
CE MOUNT
V
ARIST
ORS
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Multilayer Transient Voltage Surge Suppressors
ML Varistor Series
Surface Mount Varistors
142
w w w . l i t t e l f u s e . c o m
Device Ratings and Specifications
(Continued)
V18MLA0603
18
14
30
0.1
40 at 2A
22
28.0
125
V18MLA0402
18
14
20
0.050
40 at 1A
22
28.0
40
V18MLA0805
18
14
120
0.3
40 at 5A
22
28.0
450
V18MLA0805L
18
14
40
0.1
40 at 2A
22
28.0
250
V18MLA1206
18
14
150
0.4
40
22
28.0
1100
V18MLA1210
18
14
500
2.5
40
22
28.0
1250
V26MLA0603
26
20
30
0.1
58 at 2A
31
38
90
V26MLA0805
26
20
100
0.3
58 at 5A
29.5
38.5
190
V26MLA0805L
26
20
40
0.1
58 at 2A
29.5
38.5
115
V26MLA1206
26
20
150
0.6
56
29.5
38.5
900
V26MLA1210
26
20
300
1.2
54
29.5
38.5
1000
V30MLA0603
30
25
30
0.1
65 at 2A
37
46
75
V30MLA0805L
30
25
30
0.1
65 at 2A
37
46
80
V30MLA1210
30
25
280
1.2
62
35
43
1575
V30MLA1210L
30
25
220
0.9
62
35
43
1530
V33MLA1206
33
26
180
0.8
72
38
49
550
V42MLA1206
42
30
180
0.8
86
46
60
550
V48MLA1210
48
40
250
1.2
100
54.5
66.5
450
V48MLA1210L
48
40
220
0.9
100
54.5
66.5
430
V56MLA1206
56
40
180
1.0
110
61
77
150
V60MLA1210
60
50
250
1.5
120
67
83
375
V68MLA1206
68
50
180
1.0
130
76
90
150
V85MLA1210
85
67
250
2.5
160
95
115
225
V120MLA1210
120
107
125
2.0
230
135
165
65
NOTES:
1.
2.
3.
PART
NUMBER
MAXIMUM RATINGS (125
o
C)
SPECIFICATIONS (25
o
C)
MAXIMUM
CONTINUOUS
WORKING
VOLTAGE
MAXIMUM
NON-
REPETITIVE
SURGE
CURRENT
(8/20
s)
MAXIMUM
NON-
REPETITIVE
SURGE
ENERGY
(10/1000
s)
MAXIMUM
CLAMPING
VOLTAGE AT
10A
(OR AS NOTED)
(8/20
s)
NOMINAL VOLTAGE
AT 1mA DC TEST
CURRENT
TYPICAL
CAPACITANCE
AT f = 1MHz
V
M(DC)
V
M(AC)
I
TM
W
TM
V
C
V
N(DC)
MIN
V
N(DC)
MAX
C
(V)
(V)
(A)
(J)
(V)
(V)
(V)
(pF)
L suffix is a low capacitance and energy version; Contact your Littelfuse Sales Representative for custom capacitance requirements.
Typical leakage at 25 C<25
A, maximum leakage 50A at V ; for 0402 size, typical leakage <5A, maximum leakage 10A at V
o
M(DC)
M(DC).
Average power dissipation of transients for 0402, 0603, 0805, 1206 and 1210 sizes not to exceed 0.03W, 0.05W, 0.1W, 0.1W and 0.15W respectively.
NEW
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Temperature De-rating
When transients occur in rapid succession, the average power dissipa-
tion is the energy (watt-seconds) per pulse times the number of pulses
per second. The power so developed must be within the specifications
shown on the Device Ratings and Specifications table for the specific
device. For applications exceeding 125
o
C ambient temperature, the peak
surge current and energy ratings must be derated as shown in Figure 1.
100
80
60
40
20
0
-55
50
60
70
80
90
100
110 120
130 140 150
PERCENT OF RA
TED
V
ALUE
AMBIENT TEMPERATURE (
o
C)
FIGURE 1. PEAK CURRENT AND ENERGY
DERATING CURVE
t
1
t
2
100
50
0
O
1
TIME
PERCENT OF PEAK
V
ALUE
O
1
= VIRTUAL ORIGIN OF WAVE
t
1
= VIRTUAL FRONT TIME = 1.25 x t
(IMPULSE DURATION)
t = TIME FROM 10% TO 90% OF PEAK
t
2
= VIRTUAL TIME TO HALF VALUE
EXAMPLE:
FOR AN 8/20
s CURRENT WAVEFORM
8
s = t
1
= VIRTUAL FRONT TIME
20
s = t
2
= VIRTUAL TIME TO
HALF VALUE
FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM
FOR CLAMPING VOLTAGE
t
FIGURE 3. LIMIT V-I CHARACTERISTIC FOR V5.5MLA0402 TO V18MLA0402
100
10
1
A
CURRENT (A)
V
aristor V
olta
g
e
(V)
MAXIMUM LEAKAGE
10
A
100
A
1mA
10mA
100mA
1A
10A
100A
MAXIMUM CLAMPING VOLTAGE
V18MLA0402
V14MLA0402
V09MLA0402
V5.5MLA0402
ML Varistor Series
Surface Mount Varistors
Multilayer Transient Voltage Surge Suppressors
143
w w w . l i t t e l f u s e . c o m
3
SURF
A
CE MOUNT
V
ARIST
ORS
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Multilayer Transient Voltage Surge Suppressors
ML Varistor Series
Surface Mount Varistors
144
w w w . l i t t e l f u s e . c o m
Maximum Transient V-I Characteristic Curves
FIGURE 5. LIMIT V-I CHARACTERISTIC FOR V3.5MLA0603 TO V30MLA0603
100
10
1
A
CURRENT (A)
V
a
ristor V
o
lta
g
e
(V)
V3.5MLA0603
MAXIMUM LEAKAGE
MAXIMUM CLAMPING VOLTAGE
V5.5MLA0603
V9MLA0603
10
A
100
A
1mA
10mA
100mA
1A
10A
100A
V14MLA0603
V18MLA0603
V26MLA0603
V30MLA0603
FIGURE 6. LIMIT V-I CHARACTERISTIC FOR V3.5MLA0805L TO V30MLA0805L
100
10
1
A
CURRENT (A)
V
aristor V
o
lta
g
e
(V)
V3.5MLA0805L
MAXIMUM LEAKAGE
MAXIMUM CLAMPING VOLTAGE
V5.5MLA0805L
V9MLA0805L
10
A
100
A
1mA
10mA
100mA
1A
10A
100A
V14MLA0805L
V18MLA0805L
V26MLA0805L
V30MLA0805L
FIGURE 4. LIMIT V-I CHARACTERISTIC FOR V9MLA0402L
100
10
1
A
CURRENT (A)
V
aristor V
o
lta
g
e
(V)
10
A
100
A
1mA
10mA
100mA
1A
10A
MAXIMUM LEAKAGE
MAXIMUM CLAMPING VOLTAGE
V9MLA0402L
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