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Surface Mount Varistors
Multilayer Transient Voltage Surge Suppressors
ML Varistor Series
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
-55oC to +125oC Operating Temperature Range
Operating Voltage Range VM(DC) = 5.5V to 120V
Rated for Surge Current (8 x 20µs)
Rated for Energy (10 x 1000µs)
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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Surface Mount Varistors
Multilayer Transient Voltage Surge Suppressors
ML Varistor Series
Absolute Maximum Ratings For ratings of individual members of a series, see Device Ratings and Specifications table.
Continuous:
Steady State Applied Voltage:
ML SERIES
DC Voltage Range (VM(DC)). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5 to 120
AC Voltage Range (VM(AC)RMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5 to 107
Transient:
Non-Repetitive Surge Current, 8/20µs Waveform, (ITM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 to 500
Non-Repetitive Surge Energy, 10/1000µs Waveform, (WTM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.2 to 2.5
Operating Ambient Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to + 125
Storage Temperature Range (TSTG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to + 150
Temperature Coefficient (αV) of Clamping Voltage (VC) at Specified Test Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0.01
Device Ratings and Specifications
MAXIMUM RATINGS (125 oC)
SPECIFICATIONS (25oC)
MAXIMUM
CONTINUOUS
WORKING
VOLTAGE
MAXIMUM
NON-
REPETITIVE
SURGE
CURRENT
(8/20µs)
MAXIMUM
NON-
REPETITIVE
SURGE
ENERGY
(10/1000µs)
MAXIMUM
CLAMPING
VOLTAGE AT
10A
(OR AS NOTED)
(8/20µs)
NOMINAL VOLTAGE
AT 1mA DC TEST
CURRENT
TYPICAL
CAPACITANCE
AT f = 1MHz
PART
NUMBER
VM(DC) VM(AC)
(V) (V)
ITM
(A)
WTM
(J)
VN(DC)
VN(DC)
VC MIN MAX
C
(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
NEW V5.5MLA0402
5.5 4.0
20
0.050 15.5 at 1A 7.1 9.3
220
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
NEW V9MLA0402
9 6.5
20
0.050
22 at 1A 11 14
120
NEW V9MLA0402L
9 6.5
4
0.020
25 at 1A 11 14
33
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
NEW V14MLA0402
14 10
20
0.050
30 at 1A
15.9
20.3
70
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
UNITS
V
V
A
J
OC
OC
%/OC
3
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Multilayer Transient Voltage Surge Suppressors
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ML Varistor Series
Device Ratings and Specifications (Continued)
MAXIMUM RATINGS (125 oC)
SPECIFICATIONS (25oC)
MAXIMUM
CONTINUOUS
WORKING
VOLTAGE
MAXIMUM
NON-
REPETITIVE
SURGE
CURRENT
(8/20µs)
MAXIMUM
NON-
REPETITIVE
SURGE
ENERGY
(10/1000µs)
MAXIMUM
CLAMPING
VOLTAGE AT
10A
(OR AS NOTED)
(8/20µs)
NOMINAL VOLTAGE
AT 1mA DC TEST
CURRENT
TYPICAL
CAPACITANCE
AT f = 1MHz
PART
NUMBER
VM(DC) VM(AC)
(V) (V)
ITM
(A)
WTM
(J)
VN(DC)
VN(DC)
VC MIN MAX
C
(V)
(V) (V)
(pF)
NEW V18MLA0402
18 14
20
0.050
40 at 1A
22 28.0
40
V18MLA0603
18 14
30
0.1
40 at 2A
22 28.0
125
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. L suffix is a low capacitance and energy version; Contact your Littelfuse Sales Representative for custom capacitance requirements.
2. Typical leakage at 25oC<25µA, maximum leakage 50µA at VM(DC); for 0402 size, typical leakage <5µA, maximum leakage 10µA at VM(DC).
3. 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.
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Surface Mount Varistors
Multilayer Transient Voltage Surge Suppressors
ML Varistor Series
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 125oC 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
AMBIENTTEMPERATURE ( oC)
FIGURE 1. PEAK CURRENT AND ENERGY
DERATING CURVE
100
50
0
O1
t
t1
TIME
t2
FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM
FOR CLAMPING VOLTAGE
O1 = VIRTUAL ORIGIN OFWAVE
t = TIME FROM 10% TO 90% OF PEAK
t1 = VIRTUAL FRONT TIME = 1.25 x t
t2 = VIRTUALTIME TO HALFVALUE
(IMPULSE DURATION)
EXAMPLE:
FOR AN 8/20µs CURRENT WAVEFORM
8µs = t1 = VIRTUAL FRONT TIME
20µs = t2 = VIRTUALTIME TO
HALF VALUE
3
100
MAXIMUM CLAMPING VOLTAGE
MAXIMUM LEAKAGE
10
V18MLA0402
V14MLA0402
V09MLA0402
V5.5MLA0402
1 µA
10µA
100µA
1mA
10mA
100mA
1A
CURRENT (A)
10A 100A
FIGURE 3. LIMIT V-I CHARACTERISTIC FOR V5.5MLA0402 TO V18MLA0402
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Surface Mount Varistors
Multilayer Transient Voltage Surge Suppressors
ML Varistor Series
Maximum Transient V-I Characteristic Curves
100
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MAXIMUM LEAKAGE
10
MAXIMUM CLAMPING VOLTAGE
V9MLA0402L
144
1 µA
100
10µA
100µ A
1mA
10mA
CURRENT (A)
100mA
FIGURE 4. LIMIT V-I CHARACTERISTIC FOR V9MLA0402L
MAXIMUM LEAKAGE
MAXIMUM CLAMPING VOLTAGE
1A
10A
10
1 µA
V30MLA0603
V26MLA0603
V18MLA0603
V14MLA0603
V9MLA0603
V5.5MLA0603
V3.5MLA0603
10µA
100µA
1mA
10mA
CURRENT (A)
100mA
1A
10A 100A
FIGURE 5. LIMIT V-I CHARACTERISTIC FOR V3.5MLA0603 TO V30MLA0603
100
MAXIMUM LEAKAGE
MAXIMUM CLAMPING VOLTAGE
10
1 µA
V30MLA0805L
V26MLA0805L
V18MLA0805L
V14MLA0805L
V9MLA0805L
V5.5MLA0805L
V3.5MLA0805L
10µA
100µA
1mA
10mA
CURRENT (A)
100mA
1A
10A 100A
FIGURE 6. LIMIT V-I CHARACTERISTIC FOR V3.5MLA0805L TO V30MLA0805L
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