Varistor Products Surface Mount Multilayer Varistors (MLVs) > MLA Series RoHS MLA Varistor Series Description The wide operating voltage and energy range make the MLA Series suitable for numerous applications on power supply, control and signal lines. Size Table Metric EIA 1005 0402 1608 2012 0805 1206 1210 The MLA Series is manufactured from semiconducting ceramics, and is supplied in a leadless, surface mount package. The MLA 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 plastichoused components. Applications t 4VQQSFTTJPOPGJOEVDUJWF 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 (see also the MLE or MLN Series) t 6TFEUPIFMQBDIJFWF electromagnetic compliance of end products t 3FQMBDFMBSHFSTVSGBDF mount TVS Zeners in many applications t 1SPWJEFTPOCPBSE transient voltage protection for ICS and transistors 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 Series for multiline protection and the AUML Series for automotive applications. Features t RoHS compliant t -FBEMFTT 0805, 1206 and 1210 chip sizes t 3BUFEGPSTVSHF current (8 x 20s) t 3BUFEGPSFOFSHZ (10 x 1000s) t .VMUJMBZFSDFSBNJD construction technology t *OIFSFOUCJEJSFDUJPOBM clamping t $UP $ operating temp. range t 4UBOEBSEMPXDBQBDJUBODF types available t 0QFSBUJOHWPMUBHFSBOHF VM(DC) = 5.5V to 120V 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)) AC Voltage Range (VM(AC)RMS) Transient: Non-Repetitive Surge Current, 8/20s Waveform, (ITM) Non-Repetitive Surge Energy, 10/1000s Waveform, (WTM) 0QFSBUJOH"NCJFOU5FNQFSBUVSF3BOHF 5A) Storage Temperature Range (TSTG) Temperature Coefficient (DV) of Clamping Voltage (VC) at Specified Test Current (c)2011 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/ML.html or MLA.html for current information. ML Series Units UP UP V V 4 to 500 0.02 to 2.5 UP UP A J C C <0.01 %/ C MLA Varistor Series Revision: November 30, 2011 MLA Series The MLA Series (also known as "ML" series) family 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 Series is typically applied to protect integrated circuits and other components at the circuit board level. Varistor Products Surface Mount Multilayer Varistors (MLVs) > MLA Series Device Ratings and Specifications Part Number 7.-"/5 7.-"/ 7.-"-/ 7.-"/ V5.5MLA0402N V5.5MLA0402LN 7.-"/5 7.-"-/4 V5.5MLA0805N V5.5MLA0805LN V5.5MLA1206N 7.-"/ 7.-"-/ 7.-"/5 7.-"-/4 7.-"-/ V12MLA0805LN V14MLA0402N 7.-"/ V14MLA0805N V14MLA0805LN V14MLA1206N V18MLA0402N 7.-"/ V18MLA0805N V18MLA0805LN V18MLA1206N V18MLA1210N 7.-"/ V26MLA0805N V26MLA0805LN V26MLA1206N V26MLA1210N 7.-"/ 7.-"-/ 7.-"/ 7.-"-/ 7.-"/ V42MLA1206N V48MLA1206N V48MLA1210N V48MLA1210LN V56MLA1206N V60MLA1210N V68MLA1206N V85MLA1210N V120MLA1210N Maximum Ratings (125 C) Specifications (25C) Maximum Maximum Non- Maximum Non- Maximum Clamping Nominal Voltage Typical Continuous repetitive Surge repetitive Surge Voltage at 1A (or as at 1mA DC Test Capacitance Working Voltage Current (8/20s) Energy (10/1000s) Noted) (8/20s) Current at f = 1MHz VN(DC) VN(DC) VM(DC) VM(AC) ITM WTM VC C Min Max (V) (V) (A) (J) (V) (V) (V) (pF) 2.5 0.100 2.5 120 2.5 40 0.100 2.5 100 6000 5.5 4.0 20 0.050 21.0 10.8 220 5.5 4.0 20 0.050 21.5 5.5 4.0 0.100 500 5.5 4.0 0.100 450 5.5 4.0 120 1840 5.5 4.0 40 0.100 400 5.5 4.0 150 0.400 6.5 20 0.050 11.0 16.0 120 6.5 4 0.020 11.0 16.0 6.5 0.100 25.5 11.0 16.0 6.5 0.100 25.5 11.0 16.0 6.5 40 0.100 25.5 11.0 16.0 520 12.0 40 0.100 14.0 18.5 410 14.0 10.0 20 0.050 21.5 14.0 10.0 0.100 21.5 180 14.0 10.0 120 560 14.0 10.0 40 0.100 14.0 10.0 150 0.400 1400 18.0 14.0 20 0.050 50.0 22.0 28.0 40 18.0 14.0 0.100 50.0 22.0 28.0 120 18.0 14.0 120 44.0 22.0 28.0 520 18.0 14.0 40 0.100 44.0 22.0 28.0 18.0 14.0 150 0.400 44.0 22.0 28.0 18.0 14.0 500 2.500 44.0 at 2.5 22.0 28.0 1440 26.0 20.0 0.100 60.0 110 26.0 20.0 100 60.0 220 26.0 20.0 40 0.100 60.0 140 26.0 20.0 150 0.600 60.0 600 26.0 20.0 1.200 60.0 at 2.5 1040 25.0 0.100 46.0 25.0 0.100 46.0 25.0 280 1.200 68.0 at 2.5 1820 25.0 220 68.0 at 2.5 26.0 180 0.800 500 42.0 180 0.800 46.0 60.0 425 48.0 40.0 180 100 54.5 66.5 48.0 40.0 250 1.200 105.0 at 2.5 54.5 66.5 520 48.0 40.0 220 105.0 at 2.5 54.5 66.5 500 56.0 40.0 180 1.000 120.0 61.0 180 60.0 50.0 250 1.500 BU 440 68.0 50.0 180 1.000 140.0 100 85.0 250 2.500 180.0 at 2.5 115.0 260 120.0 125 2.000 260.0 at 2.5 165.0 80 /05&4 1 'L' suffix is a low capacitance and energy version; Contact your Littelfuse sales representative for custom capacitance requirements 2 Typical leakage at 25C<25A, maximum leakage 100A at VM(DC); for 0402 size, typical leakage <5A, maximum leakage <20A at VM(DC) "WFSBHFQPXFSEJTTJQBUJPOPGUSBOTJFOUTGPS BOETJ[FTOPUUPFYDFFE8 8 8 8BOE8SFTQFDUJWFMZ *UFNJTBWBJMBCMFBTh3hQBDLJOHPQUJPOPOMZ"MMTJ[FJUFNTBWBJMBCMFBTh3hQBDLBHJOHPQUJPOPOMZ4FF1BDLBHJOHTFDUJPOGPSBEEJUJPOBMJOGPSNBUJPO *UFNJTBWBJMBCMFJOh)h h5hBOEh"hQBDLJOHPQUJPOPOMZ"MM BOEQBSUTDPNFBTh)h h5hBOEh"hQBDLJOHPQUJPOPOMZ4FF1BDLBHJOHTFDUJPOGPSBEEJUJPOBMJOGPSNBUJPO MLA Varistor Series Revision: November 30, 2011 (c)2011 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 Series Peak Current and Energy Derating Curve Peak Pulse Current Test Waveform for Clamping Voltage 100 PERCENT OF PEAK 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 on the Device Ratings and Specifications Table for the TQFDJmDEFWJDF'PSBQQMJDBUJPOTFYDFFEJOH$BNCJFOU temperature, the peak surge current and energy ratings must be derated as shown below. 50 0 T TIME Figure 2 100 80 40 20 50 60 70 80 90 100 110 120 130 140 150 AMBIENT TEMPERATURE ( oC) Figure 1 Limit V-I Characteristic for V5.5MLA0402 to V18MLA0402 Limit V-I Characteristic for V9MLA0402L 100 10 Varistor Voltage (V) Varistor Voltage (V) 100 V18MLA0402 V14MLA0402 V9MLA0402 V5.5MLA0402 1 1A T2 017JSUVBM0SJHJOPG8BWF 55JNFGSPNUPPG1FBL T1 = Rise Time = 1.25 x T T2 = Decay Time Example - For an 8/20 T$VSSFOU8BWFGPSN 8s = T1 = Rise Time 20s = T2 = Decay Time 60 0 -55 T1 MLA Series PERCENT OF RATED VALUE O1 10A 100A 1mA 10mA 1A 10A Figure 3 V9MLA0402L V5.5MLA0402L 1 1A 100A Current (A) 10 10A 100A Figure 4 Limit V-I Characteristic for V3.5MLA0603 to V30MLA0603 1mA 10mA 1A 10A 100A Current (A) 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 100 V14MLA0805L 10 V12MLA0805L V9MLA0805L V5.5MLA0603, V5.5MLA0603L V5.5MLA0805L V3.5MLA0603 V3.5MLA0805L 1 10A Figure 5 1 10A 100A 1mA 10mA Current (A) 100mA 1A 10A (c)2011 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/ML.html or MLA.html for current information. 100A Figure 6 100A 1mA 10mA 100mA 1A 10A 100A Current (A) MLA Varistor Series Revision: November 30, 2011 Varistor Products Surface Mount Multilayer Varistors (MLVs) > MLA Series Limit V-I Characteristic for V3.5MLA0805 to V26MLA0805 Limit V-I Characteristic for V3.5MLA1206 to V68MLA1206 1000 100 100 Varistor Voltage (V) Varistor Voltage (V) 1000 V26MLA0805 10 V18MLA0805 V68MLA1206 V56MLA1206 V42MLA1206 V33MLA1206 V26MLA1206 V18MLA1206 V14MLA1206 V5.5MLA1206 V3.5MLA1206 10 V14MLA0805 V5.5MLA0805 V3.5MLA0805 1 10A 100A 1mA 10mA 100mA 1A 10A 100A 1000A Current (A) Figure 7 1 10A 100A Figure 8 1mA 10mA 100mA Current (A) 1A 10A 100A 1000A Limit V-I Characteristic for V18MLA1210 to V120MLA1210 1000 MAXIMUM CLAMPING VOLTAGE MAXIMUM LEAKAGE Varistor Voltage (V) 100 V120MLA1210 10 V85MLA1210 V60MLA1210 V48MLA1210, V48MLA1210L V30MLA1210, V30MLA1210L V26MLA1210 1 10A V18MLA1210 100A Figure 9 1mA 10mA 100mA 1A 10A 100A 1000A CURRENT (A) MLA Varistor Series Revision: November 30, 2011 (c)2011 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 Series Clamping Voltage Over Temperature (VC at 10A) 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. At or below the maximum working voltage, the suppressor is in a high resistance modex (approaching 106 at its maximum rated working voltage). Leakage currents at maximum rated voltage are below 100A, typically 25A; for 0402 size below 20A, typically 5A. CLAMPING VOLTAGE (V) 100 V26MLA1206 V5.5MLA1206 Typical Temperature Dependance of the Haracteristic Curve in the Leakage Region 10 -60 -40 Figure 11 VNOM VALUE AT 25 oC (%) SUPPRESSOR VOLTAGE IN PERCENT OF 100% -20 0 20 40 60 80 TEMPERATURE ( oC) 100 120 140 Energy Absorption/Peak Current Capability 25 10% 1E -9 o 50o 75o 1E -8 100o 125 oC 1E -7 Figure 10 1E -6 1E -5 1E -4 1E -3 1E -2 SUPPRESSOR CURRENT (ADC) 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 ZN0EJFMFDUSJDNBUFSJBMJTMFTT than 1ns and the MLA 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. Energy dissipated within the MLA 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 excellent current distribution and the peak temperature per energy absorbed is very low. The matrix of semiconducting grains combine to absorb and distribute transient energy (heat) (see Speed of Response). This dramatically reduces peak temperature; thermal stresses and enhances device reliability. As a measure of the device capability in energy and peak current handling, the V26MLA1206A part was tested with multiple pulses at its peak current rating (150A, 8/20s). 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 PEAK CURRENT = 150A 8/20 s DURATION, 30s BETWEEN PULSES FIRED CERAMIC DIELECTRIC VOLTAGE V26MLA1206 METAL ELECTRODES METAL END TERMINATION 10 DEPLETION 0 REGION Figure 13 2000 4000 6000 8000 10000 12000 NUMBER OF PULSES DEPLETION REGION Figure 12 GRAINS (c)2011 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 Varistor Series Revision: November 30, 2011 MLA Series Device Characteristics Varistor Products Surface Mount Multilayer Varistors (MLVs) > MLA Series Lead (Pb) Soldering Recommendations The principal techniques used for the soldering of components in surface mount technology are IR Re-flow and Wave soldering. Typical profiles are shown on the right. Reflow Solder Profile 250 The recommended solder for the MLA suppressor is B 4O1C"H 4O1C PS 4O1C Littelfuse also recommends an RMA solder flux. MAXIMUM TEMPERATURE 230C When using a reflow process, care should be taken to ensure that the MLA chip is not subjected to a thermal gradient steeper than 4 degrees per second; the ideal gradient being 2 degrees per second. During the soldering process, preheating to within 100 degrees of the solder's peak temperature is essential to minimize thermal shock. 0ODFUIFTPMEFSJOHQSPDFTTIBTCFFODPNQMFUFE JUJT 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 to less than 50 C before cleaning. 40-80 SECONDS ABOVE 183C 150 RAMP RATE <2C/s 100 PREHEAT DWELL 50 PREHEAT ZONE 0 Figure 14 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 260C 250 TEMPERATURE C 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. TEMPERATURE C 200 200 150 SECOND PREHEAT 100 FIRST PREHEAT 50 0 0.0 0.5 1.0 1.5 Figure 15 2.0 2.5 3.0 TIME (MINUTES) 3.5 4.0 4.5 Lead-free (Pb-free) Soldering Recommendations Littelfuse offers the Nickel Barrier Termination option (see /TVGmYJO1BSU/VNCFSJOH4ZTUFNGPSPSEFSJOH GPSUIF optimum Lead-free solder performance, consisting of a Matte Tin outer surface plated on Nickel underlayer, plated on Silver base metal. Lead-free Re-flow Solder Profile 300 MAXIMUM TEMPERATURE 260C, TIME WITHIN 5C OF PEAK 20 SECONDS MAXIMUM The reflow profile must be constrained by the maximums JOUIF-FBEoGSFF3FnPX1SPmMF'PS-FBEoGSFFXBWF TPMEFSJOH UIF8BWF4PMEFS1SPmMFTUJMMBQQMJFT /PUFUIF-FBEoGSFFQBTUF nVYBOEQSPmMFXFSFVTFEGPS evaluation purposes by Littelfuse, based upon industry standards and practices. There are multiple choices of all three available, it is advised that the customer explores the optimum combination for their process as processes vary considerably from site to site. TEMPERATURE C 250 5IFQSFGFSSFETPMEFSJT 4O"H$V XJUIBO3." flux, but there is a wide selection of pastes and fluxes available with which the Nickel Barrier parts should be compatible. RAMP RATE <3C/s 200 60 - 150 SEC > 217C 150 100 PREHEAT ZONE 50 0 0 Figure 16 MLA Varistor Series Revision: November 30, 2011 1.0 2.0 3.0 4.0 5.0 6.0 7.0 TIME (MINUTES) (c)2011 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 Series Product Dimensions (mm) 1"%-":065%*.&/4*0/4 $)*1-":065%*.&/4*0/4 C E B NOTE D L W A 1210 Size Dimension 1206 Size IN MM IN MM A 0.160 B 0.100 4.06 0.160 2.54 0.065 C 0.040 1.02 0.040 0805 Size 0603 Size IN MM 4.06 0.120 1.65 0.050 1.02 0.040 0402 Size IN MM IN MM 0.100 2.54 0.020 0.51 1.02 0.024 0.61 D (max.) 1.80 1.10 0.040 1.00 0.024 0.60 E 0.020 0.50 0.020 0.50 0.010 0.25 0.015 0.4 0.010 0.25 L 0.125 0.125 2.01 1.6 1.00 W 0.100 2.54 0.060 1.60 1.25 0.8 0.020 0.50 Part Numbering System V 18 MLA 1206 X X X PACKING OPTIONS (see Packaging table for quantities) T: 13in (330mm) Diameter Reel, Plastic Carrier Tape H: 7in (178mm) Diameter Reel, Plastic Carrier Tape R: 7in (178mm) Diameter Reel, Paper Carrier Tape A: Bulk Pack DEVICE FAMILY Littelfuse TVSS Device MAXIMUM DC WORKING VOLTAGE END TERMINATION OPTION No Letter: Standard N: Nickel Barrier Option (Matte Tin outer surface, plated on Nickel underlayer plated on silver base metal) CAPACITANCE OPTION No Letter: Standard L: Low Capacitance Version MULTILAYER SERIES DESIGNATOR DEVICE SIZE: 0201 = .024 inch x .012 inch (0.6 mm x 0.3 mm) 0402 = .04 inch x .02 inch (1.0 mm x 0.5 mm) 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) /05&4 1 V120MLA1210 standard shipping quantities are 1000 pieces per reel for the "H" option and 4000 pieces per reel for "T" option. 7.-" 7.-"BOE7.-"POMZBWBJMBCMFJO) 5BOE"QBDLJOHPQUJPOT Packaging* Quantity Device Size 13" Inch Reel ("T" Option) 7" Inch Reel ("H" Option) 7" Inch Reel ("R" Option) Bulk Pack ("A" Option) 1210 1206 0805 0402 8,000 10,000 10,000 10,000 N/A 2,000 2,500 2,500 2,500 N/A N/A N/A N/A 4,000 10,000 2,000 2,500 2,500 2,500 N/A 1BDLBHJOH *UJTSFDPNNFOEFEUIBUQBSUTCFLFQUJOUIFTFBMFECBHQSPWJEFEBOEUIBUQBSUTCFVTFEBTTPPOBTQPTTJCMFXIFOSFNPWFEGSPNCBHT (c)2011 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 Varistor Series Revision: November 30, 2011 MLA Series /05&"WPJENFUBMSVOTJOUIJTBSFB QBSUTOPUSFDPNNFOEFEGPSVTFJOBQQMJDBUJPOTVTJOH Silver (Ag) epoxy paste. Varistor Products Surface Mount Multilayer Varistors (MLVs) > MLA 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 0402 Size 0603, 0805, 1206 & 1210 Sizes A0 Width of Cavity Dependent on Chip Size to Minimize Rotation. B0 Length of Cavity Dependent on Chip Size to Minimize Rotation. Dependent on Chip Size to Minimize Rotation. K0 Depth of Cavity W Width of Tape F Distance Between Drive Hole Centers and Cavity Centers E Distance Between Drive Hole Centers and Tape Edge P1 Distance Between Cavity Centers P2 Axial Drive Distance Between Drive Hole Centers & Cavity Centers P0 Axial Drive Distance Between Drive Hole Centers D0 Drive Hole Diameter D1 %JBNFUFSPG$BWJUZ1JFSDJOH T1 Top Tape Thickness N/A 0.1 Max 0.1 Max /05&4 t$POGPSNTUP&*" 3FWJTJPO" t$BOCFTVQQMJFEUP*&$QVCMJDBUJPO MLA Varistor Series Revision: November 30, 2011 (c)2011 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/ML.html or MLA.html for current information.