Varistor Products
©2010 Littelfuse, Inc.
Revision: December 16, 2010
MLA Automotive Varistor Series
Surface Mount Multilayer Varistors (MLVs) > MLA Automotive Series
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
MLA Automotive Varistor Series
RoHS
Description
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.
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.
It can operate over a wider temperature range than Zener
diodes, and has a much smaller footprint than plastic-
housed components.
Features
t "&$2DPNQMJBOU
t 3P)4DPNQMJBOU
t -FBEMFTT
1206 and 1210 chip sizes
t .VMUJMBZFSDFSBNJD
construction technology
t ¡$UP¡$
operating temp. range
t 0QFSBUJOHWPMUBHFSBOHF
VM(DC)7UP7
t 3BUFEGPSTVSHF
DVSSFOUYT
t 3BUFEGPSFOFSHZ
YT
t *OIFSFOUCJEJSFDUJPOBM
clamping
t /PQMBTUJDPSFQPYZ
packaging assures
better than UL94V-0
flammability rating
t 4UBOEBSEMPX
capacitance types
available
Applications
t 4VQQSFTTJPOPG
inductive switching
or other transient
events such as EFT
and surge voltage at
the circuit board level
t &4%QSPUFDUJPOGPS*&$
61000-4-2, MIL-STD-
DNFUIPE
and other industry
specifications
t 1SPWJEFTPOCPBSE
transient voltage
protection for ICS
and transistors
t 6TFEUPIFMQBDIJFWF
electromagnetic
compliance of
end products
t 3FQMBDFMBSHFSTVSGBDF
mount TVS Zeners in
many applications
Size Table
Metric EIA
 
2012 
 1206
 1210
Absolute Maximum Ratings
For ratings of individual members of a series, see device ratings and specifications table.
Continuous MLA Auto Series Units
Steady State Applied Voltage:
%$7PMUBHF3BOHF7M(DC)) UP V
"$7PMUBHF3BOHF7."$3.4) UP V
Transient:
/PO3FQFUJUJWF4VSHF$VSSFOUμs Waveform, (ITM)VQUP A
/PO3FQFUJUJWF4VSHF&OFSHZμs Waveform, (WTM)UP J
0QFSBUJOH"NCJFOU5FNQFSBUVSF3BOHF5A)UP ºC
4UPSBHF5FNQFSBUVSF3BOHF5STG)UP ºC
Temperature Coefficient (DV) of Clamping Voltage (VC) at
Specified Test Current <0.01 $
Varistor Products
©2010 Littelfuse, Inc.
Revision: December 16, 2010
MLA Automotive Varistor Series
Surface Mount Multilayer Varistors (MLVs) > MLA Automotive Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html or MLA.html for current information.
Device Ratings and Specifications
Part Number
Maximum Ratings (125º C)Specifications (25ºC)
Maximum
Continuous
Working Voltage
Maximum Non-
repetitive Surge
Current (8/20μs)
Maximum
Non-repetitive
Surge Energy
(10/1000μs)
Maximum Clamping
Voltage at 1A (or as
Noted) (8/20μs)
Nominal Voltage
at 1mA DC Test
Current
Typical
Capacitance
at f = 1MHz
VM(DC) VM(AC) ITM WTM VC
V/%$
Min
V/%$
Max C
(V) (V) (A) (J) (V) (V) (V) (pF)
7.-"/)"650    0.100    
7.-"/)"650   120     
7.-"-/)"650   40 0.100    
7.-"/)"650   10 0     6000
7.-"/)"650  4.0  0.100    
7.-"/)"650  4.0 120     
7.-"-/)"650  4.0 40 0.100    400
7.-"/)"650  4.0  0.400    
7.-"/)"650 9.0   0.100  11.0 16.0 490
7.-"-/)"650 9.0  40 0.100  11.0 16.0 
7.-"-/)"650 12.0 9.0 40 0.100 29.0 14.0  410
7.-"/)"650 14.0 10.0  0.100    
7.-"/)"650 14.0 10.0 120     
7.-"-/)"650 14.0 10.0 40 0.100    
7.-"/)"650 14.0 10.0  0.400    1400
7.-"/)"650  14.0  0.100  22.0  120
7.-"/)"650  14.0 120  44.0 22.0  
7.-"-/)"650  14.0 40 0.100 44.0 22.0  290
7.-"/)"650  14.0  0.400 44.0 22.0  
7.-"/)"650  14.0   BU 22.0  1440
7.-"/)"650 26.0 20.0  0.100 60.0   110
7.-"/)"650 26.0 20.0 100  60.0   220
7.-"-/)"650 26.0 20.0 40 0.100 60.0   140
7.-"/)"650 26.0 20.0  0.600 60.0   600
7.-"/)"650 26.0 20.0  1.200 BU   1040
7.-"/)"650    0.100   46.0 90
7.-"-/)"650    0.100   46.0 90
7.-"/)"650    1.200 BU   
7.-"-/)"650   220 0.900 BU   
7.-"/)"650  26.0     49.0 
7.-"/)"650 42.0    92.0 46.0 60.0 
7.-"/)"650  40.0  1.200 BU   
7.-"-/)"650  40.0 220 0.900 BU   
/05&4
 h-hTVGmYJTBMPXDBQBDJUBODFBOEFOFSHZWFSTJPO$POUBDUZPVS-JUUFMGVTFTBMFTSFQSFTFOUBUJWFGPSDVTUPNDBQBDJUBODFSFRVJSFNFOUT
 5ZQJDBMMFBLBHFBU$μ"NBYJNVNMFBLBHFμA at VM(DC)
 "WFSBHFQPXFSEJTTJQBUJPOPGUSBOTJFOUTGPSBOETJ[FTOPUUPFYDFFE888BOE8SFTQFDUJWFMZ
Varistor Products
©2010 Littelfuse, Inc.
Revision: December 16, 2010
MLA Automotive Varistor Series
Surface Mount Multilayer Varistors (MLVs) > MLA Automotive Series
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
Peak Current and Energy Derating Curve
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
POUIF%FWJDF3BUJOHTBOE4QFDJmDBUJPOT5BCMFGPSUIF
TQFDJmDEFWJDF'PSBQQMJDBUJPOTFYDFFEJOH¡$BNCJFOU
temperature, the peak surge current and energy ratings
must be derated as shown below.
100
80
60
40
20
0
-55 50 60 70 80 90 100 110 120 130 140 150
PERCENT OF RATED VALUE
AMBIENT TEMPERATURE ( oC)
T
1
T
2
100
50
0
O1TIME
PERCENT OF PEAK VALUE
T
Peak Pulse Current Test Waveform for Clamping Voltage
017JSUVBM0SJHJOPG8BWF
55JNFGSPNUPPG1FBL
T13JTF5JNFY5
T2 = Decay Time
Example 'PSBOμT$VSSFOU8BWFGPSN
μs = T13JTF5JNF
20μs = T2 = Decay Time
Figure 1
Figure 2
Varistor Products
©2010 Littelfuse, Inc.
Revision: December 16, 2010
MLA Automotive Varistor Series
Surface Mount Multilayer Varistors (MLVs) > MLA Automotive Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html or MLA.html for current information.
Limit V-I Characteristic for V3.5MLA0603 to V30MLA0603 Limit V-I Characteristic for V3.5MLA0805L to V30MLA0805L
1
10
100
1000
10μA 100μA 1mA 10mA 100mA 1A 10A 100A
V5.5MLA0805L
V3.5MLA0805L
V9MLA0805L
V12MLA0805L
V14MLA0805L
V18MLA0805L
V26MLA0805L
V30MLA0805L
Varistor Voltage (V)
Current (A)
1
10
100
1000
10
μA
100
μA
1mA 10mA 100mA 1A 10A 100A
V30MLA0603
V26MLA0603
V18MLA0603
V14MLA0603
V9MLA0603, V9MLA0603L
V5.5MLA0603, V5.5MLA0603L
V3.5MLA0603
Varistor Voltage (V)
Current (A)
Figure 3 Figure 4
Limit V-I Characteristic for V3.5MLA0805 to V26MLA0805
1
10
100
1000
10μA 100μA 1mA 10mA 100mA 1A 10A 100A 1000A
V5.5MLA0805
V3.5MLA0805
V14MLA0805
V18MLA0805
V26MLA0805
Varistor Voltage (V)
Current (A)
Limit V-I Characteristic for V18MLA1210 to V48MLA1210
1mA10μA 100μA
CURRENT (A)
10mA 100mA 1A 10A 100A 1000A
MAXIMUM CLAMPING VOLTAGE
MAXIMUM LEAKAGE
V48MLA1210, V48MLA1210L
V30MLA1210, V30MLA1210L
V26MLA1210
V18MLA1210
100
10
Varistor Voltage (V)
1000
1
Figure 5
Limit V-I Characteristic for V3.5MLA1206 to V42MLA1206
1
10
100
1000
10
μA
100
μA
1mA 10mA 100mA 1A 10A 100A 1000A
Current (A)
V42MLA1206
V33MLA1206
V26MLA1206
V18MLA1206
V14MLA1206
V5.5MLA1206
V3.5MLA1206
Varistor Voltage (V)
Figure 6
Figure 7
Varistor Products
©2010 Littelfuse, Inc.
Revision: December 16, 2010
MLA Automotive Varistor Series
Surface Mount Multilayer Varistors (MLVs) > MLA Automotive Series
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
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.
"UPSCFMPXUIFNBYJNVNXPSLJOHWPMUBHFUIFTVQQSFTTPS
JTJOBIJHISFTJTUBODFNPEFYBQQSPBDIJOH6Ω at its
NBYJNVNSBUFEXPSLJOHWPMUBHF-FBLBHFDVSSFOUTBU
NBYJNVNSBUFEWPMUBHFBSFCFMPXμ"UZQJDBMMZμA.
100%
1E-9 1E-8
SUPPRESSOR CURRENT (ADC)
10%
1E-7 1E-6 1E-5 1E-4 1E-3 1E-2
25 50 75 100 125oC
SUPPRESSOR VOLTAGE IN PERCENT OF
VNOM VALUE AT 25 oC (%)
o
oo
o
Clamping Voltage Over Temperature (VC at 10A)
100
10
20
V26MLA1206
40 60 80 100 120 140
TEMPERATURE (oC)
CLAMPING VOLTAGE (V)
V5.5MLA1206
0-20-40-60
5ZQJDBM5FNQFSBUVSF%FQFOEBODFPGUIF)BSBDUFSJTUJD
$VSWFJOUIF-FBLBHF3FHJPO
Speed of Response
The Multilayer Suppressor is a leadless device. Its response
time is not limited by the parasitic lead inductances found
in other surface mount packages. The response time of
the Z/0EJFMFDUSJDNBUFSJBMJTMFTTUIBOOTBOEUIF.-"
"VUPNPUJWF4FSJFTDBODMBNQWFSZGBTUE7E5FWFOUTTVDIBT
ESD. Additionally, in "real world" applications, the associated
circuit wiring is often the greatest factor effecting speed of
response. Therefore, transient suppressor placement within
a circuit can be considered important in certain instances.
GRAINS
DEPLETION
FIRED CERAMIC
DIELECTRIC
REGION
METAL
ELECTRODES
DEPLETION
REGION
METAL END
TERMINATION
Multilayer Internal Construction
Energy Absorption/Peak Current Capability
Energy dissipated within the MLA Automotive Series is
calculated by multiplying the clamping voltage, transient
current and transient duration. An important advantage of
the multilayer is its interdigitated electrode construction
within the mass of dielectric material. This results in
FYDFMMFOUDVSSFOUEJTUSJCVUJPOBOEUIFQFBLUFNQFSBUVSFQFS
FOFSHZBCTPSCFEJTWFSZMPX5IFNBUSJYPGTFNJDPOEVDUJOH
grains combine to absorb and distribute transient energy
IFBUTFF4QFFEPG3FTQPOTF5IJTESBNBUJDBMMZSFEVDFT
QFBLUFNQFSBUVSFUIFSNBMTUSFTTFTBOEFOIBODFTEFWJDF
reliability.
As a measure of the device capability in energy and peak
current handling, the V26MLA1206 part was tested with
NVMUJQMFQVMTFTBUJUTQFBLDVSSFOUSBUJOH"μs). At
the end of the test,10,000 pulses later, the device voltage
characteristics are still well within specification.
100
10
0
V26MLA1206
2000 4000 6000 8000 10000 12000
NUMBER OF PULSES
VO LTAGE
PEAK CURRENT = 150A
8/20 s DURATION, 30s BETWEEN PULSES
3FQFUJUJWF1VMTF$BQBCJMJUZ
Figure 8
Figure 9
Figure 10
Figure 11
Varistor Products
©2010 Littelfuse, Inc.
Revision: December 16, 2010
MLA Automotive Varistor Series
Surface Mount Multilayer Varistors (MLVs) > MLA Automotive Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html or MLA.html for current information.
Lead (Pb) Soldering Recommendations
5IFQSJODJQBMUFDIOJRVFTVTFEGPSUIFTPMEFSJOHPG
DPNQPOFOUTJOTVSGBDFNPVOUUFDIOPMPHZBSF*33FnPX
and Wave soldering. Typical profiles are shown on the right.
The recommended solder for the MLA Automotive Series
TVQQSFTTPSJTB4O1C"H4O1CPS
4O1C-JUUFMGVTFBMTPSFDPNNFOETBO3."TPMEFSnVY
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
QFSTFDPOEUIFJEFBMHSBEJFOUCFJOHEFHSFFTQFSTFDPOE
During the soldering process, preheating to within 100
degrees of the solder's peak temperature is essential to
minimize thermal shock.
0ODFUIFTPMEFSJOHQSPDFTTIBTCFFODPNQMFUFEJUJT
still necessary to ensure that any further thermal shocks
BSFBWPJEFE0OFQPTTJCMFDBVTFPGUIFSNBMTIPDLJTIPU
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
UPMFTTUIBO$CFGPSFDMFBOJOH
Lead–free (Pb-free) Soldering Recommendations
-JUUFMGVTFPGGFSTUIF/JDLFM#BSSJFS5FSNJOBUJPOPQUJPOTFF
/TVGmYJO1BSU/VNCFSJOH4ZTUFNGPSPSEFSJOHGPSUIF
optimum Lead–free solder performance, consisting of a
.BUUF5JOPVUFSTVSGBDFQMBUFEPO/JDLFMVOEFSMBZFSQMBUFE
on Silver base metal.
5IFQSFGFSSFETPMEFSJT4O"H$VXJUIBO3."
nVYCVUUIFSFJTBXJEFTFMFDUJPOPGQBTUFTBOEnVYFT
BWBJMBCMFXJUIXIJDIUIF/JDLFM#BSSJFSQBSUTTIPVMECF
compatible.
5IFSFnPXQSPmMFNVTUCFDPOTUSBJOFECZUIFNBYJNVNT
JOUIF-FBEoGSFF3FnPX1SPmMF'PS-FBEoGSFFXBWF
TPMEFSJOHUIF8BWF4PMEFS1SPmMFTUJMMBQQMJFT
/PUFUIF-FBEoGSFFQBTUFnVYBOEQSPmMFXFSFVTFEGPS
evaluation purposes by Littelfuse, based upon industry
standards and practices. There are multiple choices of all
UISFFBWBJMBCMFJUJTBEWJTFEUIBUUIFDVTUPNFSFYQMPSFTUIF
optimum combination for their process as processes vary
considerably from site to site.
PREHEAT ZONE
PREHEAT DWELL
RAMP RATE
<2°C/s
MAXIMUM TEMPERATURE
230°C
TEMPERATURE °C
TIME (MINUTES)
250
200
150
100
50
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
40-80
SECONDS
ABOVE 183°C
TIME (MINUTES)
300
250
200
150
100
50
0
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
MAXIMUM WAVE 260°C
SECOND PREHEAT
FIRST PREHEAT
TEMPERATURE °C
MAXIMUM TEMPERATURE 260˚C,
TIME WITHIN 5˚C OF PEAK
20 SECONDS MAXIMUM
PREHEAT ZONE
RAMP RATE
<3˚C/s 60 - 150 SEC
> 217˚C
TEMPERATURE °C
TIME (MINUTES)
300
250
200
150
100
50
00 1.0 2.0 3.0 4.0 5.0 6.0 7.0
Reflow Solder Profile
Wave Solder Profile
Lead–free Re-flow Solder Profile
Figure 12
Figure 13
Figure 14
Varistor Products
©2010 Littelfuse, Inc.
Revision: December 16, 2010
MLA Automotive Varistor Series
Surface Mount Multilayer Varistors (MLVs) > MLA Automotive Series
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
Product Dimensions (mm)
/05&"WPJENFUBMSVOTJOUIJTBSFBQBSUTOPUSFDPNNFOEFEGPSVTFJOBQQMJDBUJPOTVTJOH
4JMWFS"HFQPYZQBTUF
1"%-":065%*.&/4*0/4
C
B
A
NOTE
$)*1-":065%*.&/4*0/4
E
L
W
D
Dimension 1210 Size 1206 Size 0805 Size 0603 Size
IN MM IN MM IN MM IN MM
A0.160 4.06 0.160 4.06 0.120  0.100 
B0.100       
C0.040 1.02 0.040 1.02 0.040 1.02  
D NBY      1.10 0.040 1.00
E0.020



0.020




0.010




0.4

L









2.01



1.6

W0.100



0.060

1.60

0.049







Part Numbering System
V 18 1206
PACKING
AUTOMOTIVE SERIES
OPTIONS (see Packaging table for quantities)
DEVICE SIZE:
DEVICE FAMILY
Littelfuse TVSS Device
X AUTO
MAXIMUM DC
WORKING VOLTAGE
MLA X X
CAPACITANCE OPTION
No Letter : Standard
L: Low Capacitance Version
END TERMINATION INDICATOR
MULTILAYER SERIES
DESIGNATOR
N: Nickel Barrier
(Matte Tin outer surface, plated on Nickel underlayer
plated on silver base metal)
H: 7in (178mm) Diameter Reel, Plastic Carrier Tape
0603 = .063 inch x .031 inch (1.6 mm x 0.8 mm)
0805 = .08 inch x .08 inch (2.0 mm x 1.25 mm)
1206 = .126 inch x .063 inch (3.2 mm x 1.6 mm)
1210 = .126 inch x .1 inch (3.2 mm x 2.5 mm)
Packaging*
Device Size
Quantity
7” Inch Reel
("H" Option)
1210 2,000
1206 
 
 
1BDLBHJOH*UJTSFDPNNFOEFEUIBUQBSUTCFLFQUJOUIFTFBMFECBHQSPWJEFEBOEUIBUQBSUTCFVTFEBTTPPOBTQPTTJCMFXIFOSFNPWFEGSPNCBHT
Varistor Products
©2010 Littelfuse, Inc.
Revision: December 16, 2010
MLA Automotive Varistor Series
Surface Mount Multilayer Varistors (MLVs) > MLA Automotive Series
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html or MLA.html for current information.
Tape and Reel Specifications
Symbol Description Dimensions in Millimeters
0603, 0805, 1206 & 1210 Sizes
A0Width of Cavity %FQFOEFOUPO$IJQ4J[FUP.JOJNJ[F3PUBUJPO
B0Length of Cavity %FQFOEFOUPO$IJQ4J[FUP.JOJNJ[F3PUBUJPO
K0Depth of Cavity %FQFOEFOUPO$IJQ4J[FUP.JOJNJ[F3PUBUJPO
WWidth of Tape 
F%JTUBODF#FUXFFO%SJWF)PMF$FOUFSTBOE$BWJUZ$FOUFST 
E%JTUBODF#FUXFFO%SJWF)PMF$FOUFSTBOE5BQF&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%JBNFUFSPG$BWJUZ1JFSDJOH 
T1Top Tape Thickness .BY
/05&4
t$POGPSNTUP&*"3FWJTJPO"
t$BOCFTVQQMJFEUP*&$QVCMJDBUJPO
K0
t1
D0P0
D1
P1A0
P2
B0
F
E
W
For T and H Pack Options: PLASTIC CARRIER TAPE
For R Pack Options: EMBOSSED PAPER CARRIER TAPE
EMBOSSMENT
TOP TAPE 8mm
NOMINAL
PRODUCT
IDENTIFYING
LABEL
178mm
OR 330mm
DIA. REEL