Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLA Automotive Series
RoHS
MLA Automotive Varistor Series
Description
The wide operating voltage and energy range make the
MLA Automotive Series suitable for numerous applications
on power supply, control and signal lines.
The MLA Automotive Series is manufactured from
semiconducting ceramics, and is supplied in a leadless,
surface mount package. The MLA Automtove Series
is compatible with modern reflow and wave soldering
procedures.
Size Table
Metric
EIA
2012
1206
1210
It can operate over a wider temperature range than Zener
diodes, and has a much smaller footprint than plastichoused components.
Features
Applications
t 4VQQSFTTJPOPG
inductive switching
or other transient
events such as EFT
and surge voltage at
the circuit board level
t &4%QSPUFDUJPOGPS*&$
61000-4-2, MIL-STDDNFUIPE
and other industry
specifications
t 3P)4DPNQMJBOU
t 3BUFEGPSFOFSHZ
YT
t -FBEMFTT
1206 and 1210 chip sizes
t *OIFSFOUCJEJSFDUJPOBM
clamping
t .VMUJMBZFSDFSBNJD
construction technology
t /PQMBTUJDPSFQPYZ
packaging assures
better than UL94V-0
flammability rating
t "&$2DPNQMJBOU
t 1SPWJEFTPOCPBSE
transient voltage
protection for ICS
and transistors
t 6TFEUPIFMQBDIJFWF
electromagnetic
compliance of
end products
t 3FQMBDFMBSHFSTVSGBDF
mount TVS Zeners in
many applications
t ¡$UP¡$
operating temp. range
t 0QFSBUJOHWPMUBHFSBOHF
VM(DC)7UP7
t 4UBOEBSEMPX
capacitance types
available
t 3
BUFEGPSTVSHF
DVSSFOUYT
Absolute Maximum Ratings
For ratings of individual members of a series, see device ratings and specifications table.
Continuous
Steady State Applied Voltage:
%$7PMUBHF3BOHF7M(DC))
"$7PMUBHF3BOHF7."$
3.4)
Transient:
/PO3FQFUJUJWF4VSHF$VSSFOUμs Waveform, (ITM)
/PO3FQFUJUJWF4VSHF&OFSHZμs Waveform, (WTM)
0QFSBUJOH"NCJFOU5FNQFSBUVSF3BOHF5A)
4UPSBHF5FNQFSBUVSF3BOHF5STG)
Temperature Coefficient (DV) of Clamping Voltage (VC) at
Specified Test Current
©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html or MLA.html for current information.
MLA Auto Series
Units
UP
UP
V
V
VQUP
UP
UP
UP
A
J
ºC
ºC
<0.01
$
MLA Automotive Varistor Series
Revision: December 16, 2010
MLA Auto Series
The MLA Automotive Series of transient voltage surge
suppression devices is based on the Littelfuse Multilayer
fabrication technology. These components 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 MLA Automotive
Series is typically applied to protect integrated circuits and
other components at the circuit board level.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLA Automotive Series
Device Ratings and Specifications
Part Number
7.-"/)"650
7.-"/)"650
7.-"-/)"650
7.-"/)"650
7.-"/)"650
7.-"/)"650
7.-"-/)"650
7.-"/)"650
7.-"/)"650
7.-"-/)"650
7.-"-/)"650
7.-"/)"650
7.-"/)"650
7.-"-/)"650
7.-"/)"650
7.-"/)"650
7.-"/)"650
7.-"-/)"650
7.-"/)"650
7.-"/)"650
7.-"/)"650
7.-"/)"650
7.-"-/)"650
7.-"/)"650
7.-"/)"650
7.-"/)"650
7.-"-/)"650
7.-"/)"650
7.-"-/)"650
7.-"/)"650
7.-"/)"650
7.-"/)"650
7.-"-/)"650
Maximum Ratings (125º C)
Maximum
Maximum
Maximum NonNon-repetitive
Continuous
repetitive Surge
Surge Energy
Working Voltage Current (8/20μs)
(10/1000μs)
Specifications (25ºC)
Maximum Clamping Nominal Voltage
Typical
Voltage at 1A (or as at 1mA DC Test Capacitance
Noted) (8/20μs)
Current
at f = 1MHz
VM(DC)
VM(AC)
ITM
WTM
VC
(V)
9.0
9.0
12.0
14.0
14.0
14.0
14.0
26.0
26.0
26.0
26.0
26.0
42.0
(V)
4.0
4.0
4.0
4.0
9.0
10.0
10.0
10.0
10.0
14.0
14.0
14.0
14.0
14.0
20.0
20.0
20.0
20.0
20.0
26.0
40.0
40.0
(A)
120
40
100
120
40
40
40
120
40
120
40
100
40
220
220
(J)
0.100
0.100
0.100
0.100
0.400
0.100
0.100
0.100
0.100
0.100
0.400
0.100
0.100
0.400
0.100
0.100
0.600
1.200
0.100
0.100
1.200
0.900
1.200
0.900
(V)
29.0
44.0
44.0
44.0
BU
60.0
60.0
60.0
60.0
BU
BU
BU
92.0
BU
BU
V/%$
Min
(V)
11.0
11.0
14.0
22.0
22.0
22.0
22.0
22.0
46.0
V/%$
Max
(V)
16.0
16.0
46.0
46.0
49.0
60.0
C
(pF)
6000
400
490
410
1400
120
290
1440
110
220
140
600
1040
90
90
/05&4
h-hTVGmYJTBMPXDBQBDJUBODFBOEFOFSHZWFSTJPO$POUBDUZPVS-JUUFMGVTFTBMFTSFQSFTFOUBUJWFGPSDVTUPNDBQBDJUBODFSFRVJSFNFOUT
5ZQJDBMMFBLBHFBU$μ"NBYJNVNMFBLBHFμA at VM(DC)
"WFSBHFQPXFSEJTTJQBUJPOPGUSBOTJFOUTGPSBOETJ[FTOPUUPFYDFFE888BOE8SFTQFDUJWFMZ
MLA Automotive Varistor Series
Revision: December 16, 2010
©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html or MLA.html for current information.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLA Automotive Series
Peak Current and Energy Derating Curve
Peak Pulse Current Test Waveform for Clamping Voltage
PERCENT OF PEAK VALUE
100
50
0
T
TIME
O1
T1
Figure 2
100
T2
80
60
40
20
0
-55
Figure 1
50
60
70
80
90
100
110
120
130 140 150
AMBIENT TEMPERATURE ( oC)
©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html or MLA.html for current information.
017JSUVBM0SJHJOPG8BWF
55JNFGSPNUPPG1FBL
T13JTF5JNFY5
T2 = Decay Time
Example 'PSBOμT$VSSFOU8BWFGPSN
μs = T13JTF5JNF
20μs = T2 = Decay Time
MLA Automotive Varistor Series
Revision: December 16, 2010
MLA Auto Series
PERCENT OF RATED VALUE
When transients occur in rapid succession, the average
power dissipation is the energy (watt-seconds) per pulse
times the number of pulses per second. The power so
developed must be within the specifications shown
POUIF%FWJDF3BUJOHTBOE4QFDJmDBUJPOT5BCMFGPSUIF
TQFDJmDEFWJDF'PSBQQMJDBUJPOTFYDFFEJOH¡$BNCJFOU
temperature, the peak surge current and energy ratings
must be derated as shown below.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLA Automotive Series
Limit V-I Characteristic for V3.5MLA0603 to V30MLA0603
Limit V-I Characteristic for V3.5MLA0805L to V30MLA0805L
1000
1000
V30MLA0805L
V26MLA0805L
V30MLA0603
V18MLA0805L
V26MLA0603
Varistor Voltage (V)
V18MLA0603
100
Varistor Voltage (V)
V14MLA0603
10
V9MLA0603, V9MLA0603L
V14MLA0805L
100
10
V12MLA0805L
V9MLA0805L
V5.5MLA0603, V5.5MLA0603L
V5.5MLA0805L
V3.5MLA0603
V3.5MLA0805L
1
10μA
1
10μA
100μA
1mA
Figure 3
10mA
Current (A)
100mA
1A
10A
1mA
10mA
100mA
1A
10A
100A
Current (A)
Figure 4
Limit V-I Characteristic for V3.5MLA0805 to V26MLA0805
Limit V-I Characteristic for V3.5MLA1206 to V42MLA1206
1000
1000
100
100
Varistor Voltage (V)
Varistor Voltage (V)
100μA
100A
V26MLA0805
10
V18MLA0805
V42MLA1206
V33MLA1206
V26MLA1206
V18MLA1206
V14MLA1206
V5.5MLA1206
V3.5MLA1206
10
V14MLA0805
V5.5MLA0805
V3.5MLA0805
1
10μA
100μA
1mA
10mA
100mA
1A
10A
100A
1000A
Current (A)
Figure 5
1
10μA
100μA
1mA
10mA
100mA
Current (A)
1A
10A
100A
1000A
Figure 7
Limit V-I Characteristic for V18MLA1210 to V48MLA1210
1000
MAXIMUM CLAMPING VOLTAGE
MAXIMUM LEAKAGE
Varistor Voltage (V)
100
V48MLA1210, V48MLA1210L
V30MLA1210, V30MLA1210L
V26MLA1210
10
V18MLA1210
1
10μA
100μA
1mA
Figure 6
10mA
100mA
1A
10A
100A
1000A
CURRENT (A)
MLA Automotive Varistor Series
Revision: December 16, 2010
©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html or MLA.html for current information.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLA Automotive Series
Clamping Voltage Over Temperature (VC at 10A)
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.
"UPSCFMPXUIFNBYJNVNXPSLJOHWPMUBHFUIFTVQQSFTTPS
JTJOBIJHISFTJTUBODFNPEFYBQQSPBDIJOH6Ω at its
NBYJNVNSBUFEXPSLJOHWPMUBHF
-FBLBHFDVSSFOUTBU
NBYJNVNSBUFEWPMUBHFBSFCFMPXμ"UZQJDBMMZμA.
CLAMPING VOLTAGE (V)
100
5ZQJDBM5FNQFSBUVSF%FQFOEBODFPGUIF)BSBDUFSJTUJD
$VSWFJOUIF-FBLBHF3FHJPO
V26MLA1206
V5.5MLA1206
-40
Figure 9
-20
0
40
60
80
20
TEMPERATURE ( oC)
100
120
140
Energy Absorption/Peak Current Capability
25
10%
1E -9
o
50o 75o
1E -8
100o 125 oC
1E -7
1E -6
1E -5
1E -4
1E -3
1E -2
SUPPRESSOR CURRENT (ADC)
Figure 8
Speed of Response
The Multilayer Suppressor is a leadless device. Its response
time is not limited by the parasitic lead inductances found
in other surface mount packages. The response time of
the Z/0EJFMFDUSJDNBUFSJBMJTMFTTUIBOOTBOEUIF.-"
"VUPNPUJWF4FSJFTDBODMBNQWFSZGBTUE7E5FWFOUTTVDIBT
ESD. Additionally, in "real world" applications, the associated
circuit wiring is often the greatest factor effecting speed of
response. Therefore, transient suppressor placement within
a circuit can be considered important in certain instances.
Energy dissipated within the MLA Automotive Series is
calculated by multiplying the clamping voltage, transient
current and transient duration. An important advantage of
the multilayer is its interdigitated electrode construction
within the mass of dielectric material. This results in
FYDFMMFOUDVSSFOUEJTUSJCVUJPOBOEUIFQFBLUFNQFSBUVSFQFS
FOFSHZBCTPSCFEJTWFSZMPX5IFNBUSJYPGTFNJDPOEVDUJOH
grains combine to absorb and distribute transient energy
IFBU
TFF4QFFEPG3FTQPOTF
5IJTESBNBUJDBMMZSFEVDFT
QFBLUFNQFSBUVSFUIFSNBMTUSFTTFTBOEFOIBODFTEFWJDF
reliability.
As a measure of the device capability in energy and peak
current handling, the V26MLA1206 part was tested with
NVMUJQMFQVMTFTBUJUTQFBLDVSSFOUSBUJOH"μs). At
the end of the test,10,000 pulses later, the device voltage
characteristics are still well within specification.
3FQFUJUJWF1VMTF$BQBCJMJUZ
Multilayer Internal Construction
100
METAL
ELECTRODES
PEAK CURRENT = 150A
8/20 s DURATION, 30s BETWEEN PULSES
V26MLA1206
VOLTAGE
FIRED CERAMIC
DIELECTRIC
METAL END
TERMINATION
DEPLETION
REGION
10
0
DEPLETION
Figure 11
REGION
Figure 10
2000
4000
6000
8000
10000
12000
NUMBER OF PULSES
GRAINS
©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html or MLA.html for current information.
MLA Automotive Varistor Series
Revision: December 16, 2010
MLA Auto Series
10
-60
VNOM VALUE AT 25 oC (%)
SUPPRESSOR VOLTAGE IN PERCENT OF
100%
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLA Automotive Series
Lead (Pb) Soldering Recommendations
5IFQSJODJQBMUFDIOJRVFTVTFEGPSUIFTPMEFSJOHPG
DPNQPOFOUTJOTVSGBDFNPVOUUFDIOPMPHZBSF*33FnPX
and Wave soldering. Typical profiles are shown on the right.
Reflow Solder Profile
250
Wave soldering is the most strenuous of the processes.
To avoid the possibility of generating stresses due to
thermal shock, a preheat stage in the soldering process
is recommended, and the peak temperature of the solder
process should be rigidly controlled.
When using a reflow process, care should be taken
to ensure that the MLA Automotive Series chip is not
subjected to a thermal gradient steeper than 4 degrees
QFSTFDPOEUIFJEFBMHSBEJFOUCFJOHEFHSFFTQFSTFDPOE
During the soldering process, preheating to within 100
degrees of the solder's peak temperature is essential to
minimize thermal shock.
MAXIMUM TEMPERATURE
230°C
200
TEMPERATURE °C
The recommended solder for the MLA Automotive Series
TVQQSFTTPSJTB4O1C"H
4O1C
PS
4O1C
-JUUFMGVTFBMTPSFDPNNFOETBO3."TPMEFSnVY
40-80
SECONDS
ABOVE 183°C
150
RAMP RATE
<2°C/s
100
PREHEAT DWELL
50
PREHEAT ZONE
0
Figure 12
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
TIME (MINUTES)
Wave Solder Profile
300
MAXIMUM WAVE 260°C
250
TEMPERATURE °C
0ODFUIFTPMEFSJOHQSPDFTTIBTCFFODPNQMFUFEJUJT
still necessary to ensure that any further thermal shocks
BSFBWPJEFE0OFQPTTJCMFDBVTFPGUIFSNBMTIPDLJTIPU
printed circuit boards being removed from the solder
process and subjected to cleaning solvents at room
temperature. The boards must be allowed to cool gradually
UPMFTTUIBO$CFGPSFDMFBOJOH
200
150
SECOND PREHEAT
100
FIRST PREHEAT
50
0
0.0
0.5
1.0
1.5
Figure 13
2.0
2.5
3.0
TIME (MINUTES)
3.5
4.0
4.5
Lead–free (Pb-free) Soldering Recommendations
-JUUFMGVTFPGGFSTUIF/JDLFM#BSSJFS5FSNJOBUJPOPQUJPOTFF
/TVGmYJO1BSU/VNCFSJOH4ZTUFNGPSPSEFSJOH
GPSUIF
optimum Lead–free solder performance, consisting of a
.BUUF5JOPVUFSTVSGBDFQMBUFEPO/JDLFMVOEFSMBZFSQMBUFE
on Silver base metal.
Lead–free Re-flow Solder Profile
300
MAXIMUM TEMPERATURE 260˚C,
TIME WITHIN 5˚C OF PEAK
20 SECONDS MAXIMUM
5IFSFnPXQSPmMFNVTUCFDPOTUSBJOFECZUIFNBYJNVNT
JOUIF-FBEoGSFF3FnPX1SPmMF'PS-FBEoGSFFXBWF
TPMEFSJOHUIF8BWF4PMEFS1SPmMFTUJMMBQQMJFT
/PUFUIF-FBEoGSFFQBTUFnVYBOEQSPmMFXFSFVTFEGPS
evaluation purposes by Littelfuse, based upon industry
standards and practices. There are multiple choices of all
UISFFBWBJMBCMFJUJTBEWJTFEUIBUUIFDVTUPNFSFYQMPSFTUIF
optimum combination for their process as processes vary
considerably from site to site.
TEMPERATURE °C
250
5IFQSFGFSSFETPMEFSJT4O"H$V
XJUIBO3."
nVYCVUUIFSFJTBXJEFTFMFDUJPOPGQBTUFTBOEnVYFT
BWBJMBCMFXJUIXIJDIUIF/JDLFM#BSSJFSQBSUTTIPVMECF
compatible.
RAMP RATE
<3˚C/s
200
60 - 150 SEC
> 217˚C
150
100
PREHEAT ZONE
50
0
0
Figure 14
MLA Automotive Varistor Series
Revision: December 16, 2010
1.0
2.0
3.0
4.0
5.0
6.0
7.0
TIME (MINUTES)
©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html or MLA.html for current information.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLA Automotive Series
Product Dimensions (mm)
1"%-":065%*.&/4*0/4
$)*1-":065%*.&/4*0/4
C
E
B
NOTE
D
L
W
A
/05&"WPJENFUBMSVOTJOUIJTBSFBQBSUTOPUSFDPNNFOEFEGPSVTFJOBQQMJDBUJPOTVTJOH
4JMWFS"H
FQPYZQBTUF
1206 Size
IN
MM
IN
MM
A
0.160
B
0.100
4.06
0.160
C
0.040
1.02
0.040
0805 Size
0603 Size
IN
MM
IN
MM
4.06
0.120
0.100
1.02
0.040
1.02
D NBY
1.10
0.040
1.00
E
0.020
0.020
0.010
0.4
L
2.01
1.6
W
0.100
0.060
1.60
0.049
MLA Auto Series
1210 Size
Dimension
Part Numbering System
V 18 MLA 1206 X X X AUTO
AUTOMOTIVE SERIES
DEVICE FAMILY
Littelfuse TVSS Device
PACKING OPTIONS (see Packaging table for quantities)
H: 7in (178mm) Diameter Reel, Plastic Carrier Tape
MAXIMUM DC
WORKING VOLTAGE
MULTILAYER SERIES
DESIGNATOR
DEVICE SIZE:
0603 = .063 inch x .031 inch (1.6 mm x 0.8 mm)
0805 = .08 inch x .08 inch (2.0 mm x 1.25 mm)
1206 = .126 inch x .063 inch (3.2 mm x 1.6 mm)
1210 = .126 inch x .1 inch (3.2 mm x 2.5 mm)
END TERMINATION INDICATOR
N: Nickel Barrier
(Matte Tin outer surface, plated on Nickel underlayer
plated on silver base metal)
CAPACITANCE OPTION
No Letter: Standard
L: Low Capacitance Version
Packaging*
Quantity
Device Size
7” Inch Reel
("H" Option)
1210
1206
2,000
1BDLBHJOH
*UJTSFDPNNFOEFEUIBUQBSUTCFLFQUJOUIFTFBMFECBHQSPWJEFEBOEUIBUQBSUTCFVTFEBTTPPOBTQPTTJCMFXIFOSFNPWFEGSPNCBHT
©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html or MLA.html for current information.
MLA Automotive Varistor Series
Revision: December 16, 2010
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLA Automotive Series
Tape and Reel Specifications
D0
PRODUCT
IDENTIFYING
LABEL
P0
For T and H Pack Options: PLASTIC CARRIER TAPE
For R Pack Options: EMBOSSED PAPER CARRIER TAPE
P2
E
F
K0
W
B0
t1
D1
P1
Symbol
EMBOSSMENT
TOP TAPE
A0
8mm
NOMINAL
178mm
OR 330mm
DIA. REEL
Dimensions in Millimeters
Description
0603, 0805, 1206 & 1210 Sizes
A0
Width of Cavity
%FQFOEFOUPO$IJQ4J[FUP.JOJNJ[F3PUBUJPO
B0
Length of Cavity
%FQFOEFOUPO$IJQ4J[FUP.JOJNJ[F3PUBUJPO
%FQFOEFOUPO$IJQ4J[FUP.JOJNJ[F3PUBUJPO
K0
Depth of Cavity
W
Width of Tape
F
%JTUBODF#FUXFFO%SJWF)PMF$FOUFSTBOE$BWJUZ$FOUFST
E
%JTUBODF#FUXFFO%SJWF)PMF$FOUFSTBOE5BQF&EHF
P1
%JTUBODF#FUXFFO$BWJUZ$FOUFST
P2
"YJBM%SJWF%JTUBODF#FUXFFO%SJWF)PMF$FOUFST$BWJUZ$FOUFST
P0
"YJBM%SJWF%JTUBODF#FUXFFO%SJWF)PMF$FOUFST
D0
%SJWF)PMF%JBNFUFS
D1
%JBNFUFSPG$BWJUZ1JFSDJOH
T1
Top Tape Thickness
.BY
/05&4
t$POGPSNTUP&*"3FWJTJPO"
t$BOCFTVQQMJFEUP*&$QVCMJDBUJPO
MLA Automotive Varistor Series
Revision: December 16, 2010
©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html or MLA.html for current information.