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V18MLE1206T
Datasheet
7 pgs138.12 Kb0

LITTELFUSE V18MLE1206H, V18MLE1206A, V18MLE0805WT, V18MLE0805WH, V18MLE0805WA Datasheet

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SURFACE MOUNT
VARISTORS
Surface Mount Varistors
133
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Multilayer Transient Voltage Suppressor
MLE Varistor Series
The fabrication method and materials of these devices result in capaci­tance characteristics suitable for high frequency attenuation/low-pass filter circuit functions, thereby providing suppression and filtering in a single device.
The MLE Series is manufactured from semiconducting ceramics and is sup­plied in a leadless, surface mount package.The MLE Series is compatible with modern reflow and wave soldering procedures.
Littelfuse Inc. manufactures other Multilayer Series products. See the ML Series data sheet for higher energy/peak current transient applications. See the AUML Series for automotive applications and the MLN Quad Array. For high speed applications see the MHS series.
Features
• Rated for ESD (IEC-61000-4-2)
• Characterized for Impedance and Capacitance
•-55
o
C to +125oC Operating Temperature Range
• Leadless 0402, 0603, 0805, and 1206 sizes
• Operating Voltages up to 18V
M(DC)
• Multilayer Ceramic Construction Technology
Applications
• Protection of Components and Circuits Sensitive to ESD Transients Occurring on Power Supplies, Control and Signal Lines
• Suppression of ESD Events Such as Specified in IEC-61000-4-2 or MIL-STD-883C Method-3015.7, for Electromagnetic Compliance (EMC)
• Used in Mobile Communications, Computer/EDP Products, Medical Products, Hand Held/Portable Devices, Industrial Equipment, Including Diagnostic Port Protection and I/O Interfaces
Multilayer Transient Voltage Suppressor
MLE Varistor Series
Surface Mount Varistors
134
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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 (V
M(DC)
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ≤18 V
Operating Ambient Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to + 125
O
C
Storage Temperature Range (T
STG
). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to + 150
O
C
Device Ratings and Specifications
PA RT
NUMBER
MAX CONTINUOUS WORKING VOLTAGE
-55
o
C TO 125oC
PERFORMANCE SPECIFICATIONS (25
o
C)
NOMINAL VO LTAGE
TYPICAL
CAPACITANCE
AT 1MHz
MAXIMUM LEAKAGE
(NOTE 1)
V
M(DC)
V
NOM
AT
1mA DC I
L MAX
AT APPLIED
VO LTAGE
(V) MIN (V)
MAX
(V)
(NOTE 3)
8kV CONTACT
Clamp
(V)
(NOTE 4) 15kV AIR
( pF) ( µA) V
DC
V18MLE0603L 18 22 28 50
at 10A
<60 0.1 3.5
0.3 5.5
5.0 15
25 18
V18MLE0805 18 22 28 50
at 10A
<500 0.2 3.5
0.5 5.5
5.0 15
25 18
V18MLE0805L 18 22 28 50
at 10A
<100 0.2 3.5
0.5 5.5
5.0 15
25 18
V18MLE1206 18 22 28 50
at 10A
<1700 0.5 3.5
1.0 5.5
5.0 15
25 18
NOTES:
1. For applications of 18V
DC
or less. Higher voltages available, contact your Littelfuse Sales Representative.
2. Tested with IEC-61000-4-2 Human Body Model (HBM) discharge test circuit.
3. Direct discharge to device terminals (IEC preferred test method).
4. Corona discharge through air (represents actual ESD event).
5. Capacitance may be customized, contact your Littelfuse Sales Representative.
V18MLE0603 18 22 28 50
at 10A
<100 0.1 3.5
0.3 5.5
5.0 15
25 18
V18MLE0402 18 22 28 50
at 10A
<140
<75
<135
<65
<85
<160 <40 0.1 3.5
0.3 5.5
215
10 18
MAXIMUM
ESD CLAMP VOLTAGE (NOTE 2)
Clamp
(V)
MAXIMUM CLAMPING
VOLTAGE AT SPECIFIED
CURRENT (8/20µS)
(V)
Vc
<100
<70
<75
<65
<75
<125
NEW
MLE SERIES UNITS
MLE Varistor Series
Surface Mount Varistors
Multilayer Transient Voltage Suppressor
135
www.littelfuse.com
3
SURFACE MOUNT
VARISTORS
FIGURE
4. IMPEDANCE (Z) vs FREQUENCY TYPICAL CHARACTERISTIC
0.1
FREQUENCY (MHz)
IMPEDANCE (Z)
10
100
1000
10000
1
10
100
0.01
-0402
-0603
-0805
-1206
Typical Performance Curves
For applications exceeding 1250C ambient temperature, the peak surge current and energy ratings must be reduced as shown in Figure 1.
30
10
0.0001250.001 0.01 0.1 1
NUMBER OF PULSES
VARISTOR VOLTAGE (V)
FIGURE 3. STANDBY CURRENT AT NORMALIZED VARISTOR
VOLTAGE AND TEMPERATURE
25
20
15
10
5
85
125
O
O
O
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)
FIGURE 1. PEAK CURRENT AND ENERGY DERATING CURVE
FIGURE 2. NOMINAL VOLTAGE STABILITY TO MULTIPLE
ESD IMPULSES (8KV CONTACT DISCHARGES PER IEC 61000-4-2)
25
0
1
CURRENT (A)
NOMINAL VOLTAGE AT 1mADC
10
100
1000
10000
5
10
15
20
30
Multilayer Transient Voltage Suppressor
MLE Varistor Series
Surface Mount Varistors
136
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Soldering Recommendations
The principal techniques used for the soldering of components in surface mount technology are Infrared (IR) re-flow, vapour phase re-flow, and wave soldering. When wave soldering, the MLE suppressor is attached to the circuit board by means of an adhesive. The assembly is then placed on a conveyor and run through the soldering process to contact the wave. With IR and vapour phase re-flow, the device is placed in a solder paste on the substrate. As the solder paste is heated, it reflows and solders the unit to the board.
The recommended solder for the MLE suppressor is a 62/36/2 (Sn/Pb/Ag), 60/40 (Sn/Pb), or 63/37 (Sn/Pb). Littelfuse also recommends an RMA solder flux.
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. For 0402 size devices, IR re-flow is recommended.
When using a reflow process, care should be taken to ensure that the MLE 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. Examples of the soldering conditions for the MLE series of suppressors are given in the tables below.
Once the soldering process has been completed, it is still necessary to ensure that any further thermal shocks are avoided. One possible cause of thermal shock is hot 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 50oC before cleaning.
Termination Options
Littelfuse offers two types of electrode termination finish for the MLE series:
1. Silver/Platinum (standard) (Not 0402 and 0603 sizes)
2. Silver/Palladium (optional)
FIGURE 6. WAVE SOLDER PROFILE
FIGURE 7. VAPOR PHASE SOLDER PROFILE
TEMPERATURE (
o
C)
TIME (MINUTES)
300
250
200
150
100
50
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
MAXIMUM WAVE 260oC
SECOND PREHEAT
FIRST PREHEAT
TEMPERATURE (
o
C)
TIME (MINUTES)
250
200
150
100
50
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
RAMP RATE
PREHEAT ZONE
>50
o
C/s
MAXIMUM TEMPERATURE 222
o
C
40-80
SECONDS
ABOVE 183
o
C
FIGURE 5. REFLOW SOLDER PROFILE
TEMPERATURE (
o
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
MAXIMUM
PREHEAT DWELL
PREHEAT ZONE
TEMPERATURE 222
o
C
RAMP RATE <2
o
C/s
40-80
SECONDS
ABOVE 183
o
C
3. Nickel Barrier (optional for 0402-1210 package size) (The ordering information section describes how to designate them.)
MLE Varistor Series
Surface Mount Varistors
Multilayer Transient Voltage Suppressor
137
www.littelfuse.com
3
SURFACE MOUNT
VARISTORS
Recommended Pad Outline
C
B
A
NOTE: Avoid metal runs in this area.
NOTE
DIMENSION
RECOMMENDED PAD SIZE DIMENSIONS
1206 SIZE DEVICE 0805 SIZE DEVICE 0603 SIZE DEVICE
IN MM IN MM IN MM
A 0.160 4.06 0.120 3.05 0.100 2.54
B 0.065 1.65 0.050 1.27 0.030 0.76
C 0.040 1.02 0.040 1.02 0.035 0.89
TABLE 1: PAD LAYOUT DIMENSIONS
0402 SIZE DEVICE
IN MM
0.067 1.70
0.020 0.51
0.024 0.61
Multilayer Transient Voltage Suppressor
MLE Varistor Series
Surface Mount Varistors
138
www.littelfuse.com
Standard Shipping Quantities
D
E
W
L
Mechanical Dimensions
DIMENSION
1206 SIZE 0805 SIZE 0603 SIZE
IN MM IN MM IN MM
E
0.071
L
0.02±0.01
W
0.125±0.012
DEVICE DIMENSIONS
0402 SIZE
IN MM
D Max
0.06±0.011
1.80
0.50±0.25
3.20±0.03
1.60±0.28
0.043
0.02±0.01
0.079±0.008
0.049±0.008
1.1
0.50±0.25
2.01±0.2
1.25±0.2
0.035
0.015±0.008
0.063±0.006
0.032±0.006
0.9
0.4±0.2
1.6±0.15
0.8±0.15
0.024
0.010±0.006
0.039±0.004
0.020±0.004
0.6
0.25±0.15
1.0±0.1
0.5±0.1
V 18 1206
PACKING OPTIONS
A: Bulk Pack (not 0402 size) H: 7in (178mm) Diameter Reel T: 13in (330mm) Diameter Reel
DEVICE SIZE:
i.e., 120 mil x 60 mil
DEVICE FAMILY
Littelfuse TVSS Device
X
MAXIMUM DC WORKING VOLTAGE
MLE X X
CAPACITANCE OPTION
No Letter: Standard
L: Low Capacitance Version
END TERMINATION OPTION
No Letter: Ag/Pt (Standard)
W: Ag/Pd
MULTILAYER SERIES DESIGNATOR
(3mm x 1.5mm)
(not 0402 size)
N: Nickel Barrier (0402-1210) For 0402 package size,
Nickel Barrier termination is subject to availibility. Please contact a Littelfuse sales representative.
Ordering Information
VXXMLE TYPES
DEVICE SIZE “13” INCH REEL (“T” OPTION) “7” INCH REEL (“H” OPTION) BULK PACK (“A” OPTION)
1206 10,000 2,500 2500
0805 10,000 2,500 2500
0603 10,000 2,500 2500
0402
N/A
N/A
10,000
MLE Varistor Series
Surface Mount Varistors
Multilayer Transient Voltage Suppressor
139
www.littelfuse.com
3
SURFACE MOUNT
VARISTORS
Tape and Reel Specifications
• Conforms to EIA - 481-1, Revision A
• Can be supplied to IEC publication 286 - 3
SYMBOL DESCRIPTION
DIMENSIONS IN MILLIMETERS
A
0
Width of Cavity Dependent on Chip Size to Minimize Rotation.
B
0
Length of Cavity Dependent on Chip Size to Minimize Rotation.
K
0
Depth of Cavity Dependent on Chip Size to Minimize Rotation.
W Width of Tape 8 ±0.2
F Distance Between Drive Hole Centers and Cavity Centers 3.5 ±0.05
E Distance Between Drive Hole Centers and Tape Edge 1.75 ±0.1
P
1
Distance Between Cavity Centers 4 ±0.1
P
2
Axial Drive Distance Between Drive Hole Centers & Cavity Centers 2 ±0.1
P
0
Axial Drive Distance Between Drive Hole Centers 4 ±0.1
D
0
Drive Hole Diameter 1.55 ±0.05
D
1
Diameter of Cavity Piercing 1.05 ±0.05
T
1
0.1 Max
Top Tape Thickness
0402 Size 0603, 0805, & 1206 Sizes
2±0.05
N/A
K
0
t
1
D
0
P
0
D
1
P
1
A
0
P
2
B
0
F
E
W
PLASTIC CARRIER TAPE
EMBOSSMENT
TOP TAPE
8mm
NOMINAL
PRODUCT
IDENTIFYING
LABEL
178mm OR 330mm DIA. REEL
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