Varistor Series Series family Transient Voltage Surge Suppression
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Multilayer Transient Voltage Surge Suppressors
Varistor Series
Series family Transient Voltage Surge Suppression devices based Littelfuse Multilayer fabrication technology. These components designed suppress variety transient events, including those specified 61000-4-2 other standards used Electromagnetic Compliance (EMC). Series typically applied protect integrated circuits other components circuit board level. wide operating voltage energy range make Series suitable numerous applications power supply, control signal lines. Series manufactured from semiconducting ceramics, supplied leadless, surface mount package. Series compatible with modern reflow wave soldering procedures. operate over wider temperature range than zener diodes, much smaller footprint than plastic-housed components. Littelfuse Inc. manufactures other Multilayer Series products. Series data sheet applications, Series data sheet high-speed applications, multiline protection AUML Series automotive applications.
SURFACE MOUNT VARISTORS
Features
Leadless 0402, 0603, 0805, 1206 1210 Chip Sizes Multilayer Ceramic Construction Technology +125oC Operating Temperature Range Operating Voltage Range VM(DC) 5.5V 120V Rated Surge Current 20µs) Rated Energy 1000µs) Inherent Bi-directional Clamping Plastic Epoxy Packaging Assures Better than 94V-0 Flammability Rating Standard Capacitance Types Available 100% Lead-Free
Size Metric
1005 1608 2012 3216 3225 4532 5650
0402 0603 0805 1206 1210 1812 2220
Applications
Suppression Inductive Switching Other Transient Events Such Surge Voltage Circuit Board Level Protection Components Sensitive 61000-4-2, MIL-STD-883C Method 3015.7, Other Industry Specifications (See Also Series) Provides On-Board Transient Voltage Protection Transistors Used Help Achieve Electromagnetic Compliance Products Replace Larger Surface Mount Zeners Many Applications
Multilayer Transient Voltage Surge Suppressors
Varistor Series
Absolute Maximum Ratings ratings individual members series, Device Ratings Specifications table.
Continuous: SERIES Steady State Applied Voltage: Voltage Range (VM(DC)) Voltage Range (VM(AC)RMS). Transient: Non-Repetitive Surge Current, 8/20µs Waveform, (ITM) Non-Repetitive Surge Energy, 10/1000µs Waveform, (WTM) 0.02 Operating Ambient Temperature Range (TA) Storage Temperature Range (TSTG) Temperature Coefficient Clamping Voltage (VC) Specified Test Current <0.01
UNITS
%/OC
Device Ratings Specifications
MAXIMUM RATINGS (125 MAXIMUM NONREPETITIVE SURGE CURRENT (8/20µs) MAXIMUM NONREPETITIVE SURGE ENERGY (10/1000µs) MAXIMUM CLAMPING VOLTAGE NOTED) (8/20µs) SPECIFICATIONS
MAXIMUM CONTINUOUS WORKING VOLTAGE
NOMINAL VOLTAGE TEST CURRENT VN(DC) VN(DC) 20.3 16.0 18.5 20.3 20.3 20.3 20.3 20.3
TYPICAL CAPACITANCE 1MHz
VM(DC) VM(AC) PART NUMBER V3.5MLA0603 V3.5MLA0805 V3.5MLA0805L V3.5MLA1206
I(A)
W(J) 0.050 0.050 0.050 0.020 0.050
15.5 15.5 15.5
15.9 11.0 15.9 15.9 15.9 15.9 15.9
(pF) 1100 2200 1200 6000 1600 4500 1600
V5.5MLA0402 V5.5MLA0402L V5.5MLA0603 V5.5MLA0805 V5.5MLA0805L V5.5MLA1206
V9MLA0402 V9MLA0402L V9MLA0603 V9MLA0805L V12MLA0805L
V14MLA0402 V14MLA0603 V14MLA0805 V14MLA0805L V14MLA1206
Multilayer Transient Voltage Surge Suppressors
Varistor Series
Device Ratings Specifications
(Continued)
MAXIMUM RATINGS (125 MAXIMUM NONREPETITIVE SURGE CURRENT (8/20µs) MAXIMUM NONREPETITIVE SURGE ENERGY (10/1000µs) MAXIMUM CLAMPING VOLTAGE NOTED) (8/20µs) SPECIFICATIONS
MAXIMUM CONTINUOUS WORKING VOLTAGE
NOMINAL VOLTAGE TEST CURRENT VN(DC) VN(DC) 28.0 28.0 28.0 28.0 28.0 28.0 38.5 38.5 38.5 38.5 66.5 66.5
TYPICAL CAPACITANCE 1MHz
SURFACE MOUNT VARISTORS
VM(DC) VM(AC) PART NUMBER
I(A)
W(J) 0.050
29.5 29.5 29.5 29.5 54.5 54.5
(pF) 1100 1250 1000 1575 1530
V18MLA0402 V18MLA0603 V18MLA0805 V18MLA0805L V18MLA1206 V18MLA1210 V26MLA0603 V26MLA0805 V26MLA0805L V26MLA1206 V26MLA1210 V30MLA0603 V30MLA0805L V30MLA1210 V30MLA1210L V33MLA1206 V42MLA1206 V48MLA1210 V48MLA1210L V56MLA1206 V60MLA1210 V68MLA1206 V85MLA1210 V120MLA1210
NOTES: suffix capacitance energy version; Contact your Littelfuse Sales Representative custom capacitance requirements. Typical leakage C<25µA, maximum leakage 50µA VM(DC); 0402 size, typical leakage <5µA, maximum leakage <20µA VM(DC). Average power dissipation transients 0402, 0603, 0805, 1206 1210 sizes exceed 0.03W, 0.05W, 0.1W, 0.1W 0.15W respectively.
Multilayer Transient Voltage Surge Suppressors
Varistor Series
Temperature De-rating
When transients occur rapid succession, average power dissipation energy (watt-seconds) pulse times number pulses second. power developed must within specifications shown Device Ratings Specifications table specific device. applications exceeding 125oC ambient temperature, peak surge current energy ratings must derated shown Figure
PERCENT RATED VALUE PERCENT PEAK VALUE
TIME
FIGURE PEAK PULSE CURRENT TEST WAVEFORM CLAMPING VOLTAGE
VIRTUAL ORIGIN WAVE TIME FROM PEAK VIRTUAL FRONT TIME 1.25 VIRTUAL TIME HALF VALUE (IMPULSE DURA TION) EXAMPLE: 8/20µs CURRENT WAVEFORM VIRTUAL FRONT TIME 20µs VIRTUAL TIME HALF VALUE
AMBIENT TEMPERATURE
FIGURE PEAK CURRENT ENERGY DERATING CURVE
MAXIMUM CLAMPING VOLTAGE
Varistor Voltage
MAXIMUM LEAKAGE
V18MLA0402 V14MLA0402 V09MLA0402 V5.5MLA0402
10µA
100µA
10mA CURRENT
100mA
100A
FIGURE LIMIT CHARACTERISTIC V5.5MLA0402 V18MLA0402
Multilayer Transient Voltage Surge Suppressors
Varistor Series
Maximum Transient Characteristic Curves
Varistor Voltage
MAXIMUM LEAKAGE
MAXIMUM CLAMPING VOLTAGE
V9MLA0402L
SURFACE MOUNT VARISTORS
10µA
100µ
10mA CURRENT
100mA
FIGURE LIMIT CHARACTERISTIC V9MLA0402L
MAXIMUM CLAMPING VOLTAGE
MAXIMUM LEAKAGE
Varistor Voltage
V30MLA0603 V26MLA0603 V18MLA0603 V14MLA0603 V9MLA0603 V5.5MLA0603 V3.5MLA0603 10µA 100µA 10mA 100mA 100A
CURRENT
FIGURE LIMIT CHARACTERISTIC V3.5MLA0603 V30MLA0603
MAXIMUM CLAMPING VOLTAGE
MAXIMUM LEAKAGE
Varistor Voltage
V30MLA0805L V26MLA0805L V18MLA0805L V14MLA0805L V9MLA0805L V5.5MLA0805L V3.5MLA0805L 10µA 100µA 10mA 100mA 100A
CURRENT
FIGURE LIMIT CHARACTERISTIC V3.5MLA0805L V30MLA0805L
Multilayer Transient Voltage Surge Suppressors
Varistor Series
Maximum Transient Characteristic Curves
MAXIMUM CLAMPING VOLTAGE MAXIMUM LEAKAGE
(Continued)
Varistor Voltage
V26MLA0805 V18MLA0805 V14MLA0805 V5.5MLA0805 V3.5MLA0805 10µA 100µA 10mA CURRENT 100mA 100A 1000A
FIGURE LIMIT CHARACTERISTIC V3.5MLA0805 V26MLA0805
1000 V68MLA1206 V56MLA1206 V42MLA1206 V33MLA1206 V26MLA1206 V18MLA1206
Varistor Voltage
V14MLA1206
V5.5MLA1206 V3.5MLA1206
MAXIMUM LEAKA 10µA 100µA 10mA
MAXIMUM CLAMP VOLTAGE 100mA 100A 1000A
CURRENT
FIGURE LIMIT CHARACTERISTIC V3.5MLA1206 V68MLA1206
1000 MAXIMUM CLAMPING VOLTAGE MAXIMUM LEAKAGE
V120MLA1210 Varistor Voltage V85MLA1210 V60MLA1210 V48MLA1210, V48MLA1210L V30MLA1210, V30MLA1210L V26MLA1210 V18MLA1210 10µA 100µA 10mA CURRENT 100mA 100A 1000A
FIGURE LIMIT CHARACTERISTIC V18MLA1210 V120MLA1210
Multilayer Transient Voltage Surge Suppressors
Varistor Series
Device Characteristics
CLAMPING VOLTAGE
current levels, curve multilayer transient voltage suppressor approaches linear (ohmic) relationship shows temperature dependent effect (Figure 10). below maximum working voltage, suppressor high resistance mode (approaching maximum rated working voltage). Leakage currents maximum rated voltage below 50µA, typically 25µA; 0402 size below 10µA, typically 5µA.
100% SUPPRESSOR VOLTAGE PERCENT
V26MLA1206
V5.5MLA1206
VNOM VALUE
TEMPERATURE
FIGURE CLAMPING VOLTAGE OVER TEMPERATURE 10A)
100o 125oC
Energy Absorption/Peak Current Capability
Energy dissipated within calculated multiplying clamping voltage, transient current transient duration. important advantage multilayer interdigitated electrode construction within mass dielectric material. This results excellent current distribution peak temperature energy absorbed very low. matrix semiconducting grains combine absorb distribute transient energy (heat) (Figure 11). This dramatically reduces peak temperature; thermal stresses enhances device reliability. measure device capability energy peak current handling, V26MLA1206A part tested with multiple pulses peak current rating (150A, 8/20µs). test, 10,000 pulses later, device voltage characteristics still well within specification (Figure 13).
SUPPRESSOR CURRENT (ADC)
FIGURE TYPICAL TEMPERATURE DEPENDANCE CHARACTERISTIC CURVE LEAKAGE REGION
Speed Response
Multilayer Suppressor leadless device. response time limited parasitic lead inductances found other surface mount packages. response time Zinc Oxide dielectric material less than nanosecond clamp very fast dV/dT events such ESD. Additionally, "real world" applications, associated circuit wiring often greatest factor effecting speed response. Therefore, transient suppressor placement within circuit considered important certain instances.
FIRED CERAMIC DIELECTRIC
PEAK CURRENT 150A 8/20µs DURA TION, BETWEEN PULSES
METAL ELECTRODES METAL TERMINATION
VOLTAGE
V26MLA1206
2000 4000 6000 NUMBER PULSES
DEPLETION REGION
8000
10000
12000
FIGURE REPETITIVE PULSE CAPABILITY
DEPLETION REGION GRAINS
FIGURE MULTILA INTERNAL CONSTRUCTION
SURFACE MOUNT VARISTORS
Multilayer Transient Voltage Surge Suppressors
Varistor Series
Soldering Recommendations
TEMPERATURE MAXIMUM TEMPERATURE 40-80 SECONDS ABOVE RAMP RATE <2oC/s PREHEAT DWELL PREHEAT ZONE
principal techniques used soldering components surface mount technology Infrared (IR) re-flow, vapour phase re-flow wave soldering. Typical profiles shown Figures When wave soldering, suppressor attached circuit board means adhesive. assembly then placed conveyor through soldering process contact wave. With vapour phase reflow; device placed solder paste substrate. solder paste heated, re-flows solders unit board. recommended solder suppressor 62/36/2 (Sn/Pb/Ag), 60/40 (Sn/Pb) 63/37 (Sn/Pb). Littelfuse also recommends solder flux. Wave soldering most strenuous processes. avoid possibility generating stresses thermal shock, preheat stage soldering process recommended, peak temperature solder process should rigidly controlled. When using reflow process, care should taken ensure that chip subjected thermal gradient steeper than degrees second; ideal gradient being degrees second. During soldering process, preheating within degrees solder's peak temperature essential minimize thermal shock. Examples soldering conditions suppressor given tables below.
TIME (MINUTES)
FIGURE REFLOW SOLDER PROFILE
MAXIMUM WAVE TEMPERATURE SECOND PREHEAT FIRST PREHEAT
Once soldering process been completed, still necessary ensure that further thermal shocks avoided. possible cause thermal shock printed circuit boards being removed from solder process subjected cleaning solvents room temperature. boards must allowed cool gradually less than 50oC before cleaning.
Termination Options
Littelfuse offers three types electrode termination finish Multilayer product series: Silver/Platinum Silver/Palladium Nickel Barrier (available 0402-1210 package size) (The ordering information section describes designate them.)
TIME (MINUTES)
FIGURE WAVE SOLDER PROFILE
MAXIMUM TEMPERATURE TEMPERATURE 40-80 SECONDS ABOVE RAMP RATE >50oC/s PREHEAT ZONE
TIME (MINUTES)
FIGURE VAPOR PHASE SOLDER PROFILE
Multilayer Transient Voltage Surge Suppressors
Varistor Series
Recommended Outline
NOTE
NOTE: Avoid metal runs this area.
TABLE LAYOUT DIMENSIONS SIZE 1210 SIZE DEVICE DIMENSION 0.160 0.100 0.040 4.06 2.54 1.02 1206 SIZE DEVICE 0.160 0.065 0.040 4.06 1.65 1.02 0805 SIZE DEVICE 0.120 0.050 0.040 3.05 1.27 1.02 0603 SIZE DEVICE 0.100 0.030 0.035 2.54 0.76 0.89 0402 SIZE DEVICE 0.067 0.020 0.024 1.70 0.51 0.61
SURFACE MOUNT VARISTORS
Varistor Series
Mechanical Dimensions
CHIP SIZE 1210 DIMENSION Max. 0.113 0.02 ±0.01 0.125 ±0.012 0.10 ±0.012 2.87 0.50 ±0.25 3.20 ±0.30 2.54 ±0.30 0.071 0.02 ±0.01 0.125 ±0.012 0.06 ±0.011 1206 1.80 0.50 ±0.25 3.20 ±0.30 1.60 ±0.28 0.043 0.01 0.029 0.079 ±0.008 0.049 ±0.008 0805 1.10 0.50 0.25 2.01 ±0.20 1.25 ±0.20 0.035 0.015 ±0.008 0.063 ±0.006 0.032 ±0.06 0603 0.90 ±0.2 ±0.15 ±0.15 0.024 0.010 ±0.006 0.039 ±0.004 0.020 ±0.004 0402 0.90 0.25 ±0.15 ±0.1 ±0.1
Ordering Information
VXXML TYPES
1206
DEVICE FAMILY Littelfuse TVSS Device MAXIMUM WORKING VOLTAGE MULTILAYER SERIES DESIGNATOR
PACKING OPTIONS 13in (330mm) Diameter Reel (178mm) Diameter Reel (Note) Bulk Pack TERMINATION OPTION Letter: Ag/Pt Ag/Pd Nickel Barrier (0402 -1210 only).
DEVICE SIZE: (3MM 1.5MM)
CAPACITANCE OPTION Letter: Standard Capacitance Version
Standard Shipping Quantities
DEVICE SIZE 1210 1206 0805 0603 0402 "13" INCH REEL ("T"OPTION) 8,000 10,000 10,000 10,000 "7"INCH REEL ("H"OPTION) 2,000 2,500 2,500 2,500 10,000 BULK PACK ("A"OPTION) 2500 2500 2500 2500
Multilayer Transient Voltage Surge Suppressors
Varistor Series
Tape Reel Specifications
Conforms 481-1, Revision supplied Publication
SYMBOL Width Cavity Length Cavity Depth Cavity Width Tape Distance Between Drive Hole Centers Cavity Centers Distance Between Drive Hole Centers Tape Edge Distance Between Cavity Centers Axial Drive Distance Between Drive Hole Centers Cavity Centers Axial Drive Distance Between Drive Hole Centers Drive Hole Diameter Diameter Cavity Piercing Tape Thickness
2±0.05
DESCRIPTION
DIMENSIONS MILLIMETERS
0402 Size 0603, 0805, 1206 1210 Sizes
Dependent Chip Size Minimize Rotation. Dependent Chip Size Minimize Rotation. Dependent Chip Size Minimize Rotation. ±0.2 ±0.05 1.75 ±0.1 ±0.1 ±0.1 ±0.1 1.55 ±0.05 1.05 ±0.05
SURFACE MOUNT VARISTORS
PLASTIC CARRIER TAPE
EMBOSSED PAPER (0402 SIZE ONLY)
PRODUCT IDENTIFYING LABEL
EMBOSSMENT TAPE
NOMINAL
178mm 330mm DIA. REEL
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