V22CH8S [LITTELFUSE]
Varistor, 18V, 1J, Surface Mount, CHIP, ROHS COMPLIANT;
| 型号： | V22CH8S |
| 厂家： | 
LITTELFUSE |
| 描述： | Varistor, 18V, 1J, Surface Mount, CHIP, ROHS COMPLIANT 电阻器 |
| 文件： | 总6页 (文件大小：212K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Varistor Products
Surface Mount Varistors > CH Series
RoHS
CH Varistor Series
Description
CH Series transient surge suppressors are small,
metal-oxide varistors (MOVs) manufactured in leadless
chip form. They are intended for use in a variety of
applications from low voltage DC to off-line board-level
protection. These devices, which have significantly
lower profiles than traditional radial lead varistors,
permit designers to reduce the size and weight and
increase the reliability of their equipment designs.
CH Series varistors are available in a voltage range from
14V to 275V (VM(AC)RMS), and energy ratings up to 8J.
See the Littelfuse Multilayer Suppressor Series also.
Agency Approvals
Features
Recognized under the components program of
Underwriters Laboratories.
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reel or bulk pack
AGENCY
AGENCY FILE NUMBER
UL E320116
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mount chip in 5
x 8mm Size
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125ºC ambient
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VM(AC)RMS 14V to 275V
Absolute Maximum Ratings
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Continuous
CH Series
Units
Steady State Applied Voltage:
AC Voltage Range (VM(AC)RMS
)
14 to 275
18 to 369
V
V
DC Voltage Range (VM(DC)
)
Transient:
Peak Pulse Current (ITM
)
For 8/20μs Current (See Figure 2)
Single Pulse Energy Range
100 to 250
A
For 10/1000μs Current Wave (WTM
)
1.0 to 8.0
-55 to +125
-55 to +150
<0.01
J
ºC
Operating AmbientTemperature Range (TA)
StorageTemperature Range (TSTG
Temperature Coefficient (DV) of Clamping Voltage (VC) at Specified Test Current
)
ºC
%/ºC
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of
the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/CH.html for current information.
CHVaristor Series
Revision: August 30, 2010
Varistor Products
Surface Mount Varistors > CH Series
Device Ratings and Specifications
Maximum Ratings (125ºC)
Continuous Transient
Specifications (25ºC)
Varistor Voltage at 1 mA DC Max Clamping Volt VC at
Test Current
Test Current (8/20μs)
Typical
Part
Number
Capacitance
Energy
(10/1000μ s)
Peak Current
(8/20μs)
VRMS
VDC
VM(AC)
(V)
14
VM(DC)
(V)
WTM
ITM
MIN
(V)
VN(DC)
(V)
MAX
(V)
VC
(V)
IP
(A)
5
f=1MHz
(pF)
1600
1300
750
700
650
600
500
300
250
120
110
(J)
(A)
V22CH8
V27CH8
V33CH8
V39CH8
V47CH8
V56CH8
V68CH8
V120CH8
V150CH8
V180CH8
V200CH8
V220CH8
V240CH8
V360CH8
V390CH8
V430CH8
18 (Note 3) 1.0 (Note2)
100
100
100
100
100
100
100
250
250
250
250
250
250
250
250
250
18.7
22.0
26.0
47
17
22
26
1.0
1.0
1.0
1.2
1.4
1.5
2.0
3.0
4.0
4.0
5.0
5.0
6.0
7.0
23.0
27.0
31.1
57
5
20
29.5
33.0
36.5
68
5
25
31
35.0
39.0
43.0
79
5
30
38
42.0
47.0
52.0
92
5
35
45
50.0
56.0
62.0
107
127
200
250
295
340
360
395
595
650
710
5
40
56
61.0
68.0
75.0
10
10
10
10
10
10
10
10
10
10
75
102
127
153
175
180
200
300
330
369
108.0
135.0
162.0
184.0
198.0
212.0
324.0
354.0
389.0
120.0
150.0
180.0
200.0
220.0
240.0
360.0
390.0
430.0
132.0
165.0
198.0
228.0
242.0
268.0
396.0
429.0
473.0
95
115
130
140
150
230
250
275
105
100
70
60
8.0
50
NOTES:
1. Power dissipation of transients not to exceed 0.25W.
2. Energy rating for impulse duration of 30ms minimum to one half of peak current value.
3. Also rated to withstand 24V for 5 minutes.
4. All Littelfuse CH Series Varistors are recognized under UL file #E320116 as a recognized component.
5. TheTypical Capacitance is for reference only
Current, Energy and Power Derating Curve
Continuous power dissipation capability is not an applicable
design requirement for a suppressor, unless transients
occur in rapid succession. Under this condition, the
average power dissipation required is simply 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
SpecificationsTable for the specific device. Furthermore,
the operating values need to be derated at high tempera
tures as shown in this diagram. Because varistors can only
dissipate a relatively small amount of average power they
are, therefore, not suitable for repetitive applications that
involve substantial amounts of average power dissipation.
100
90
80
70
60
50
40
30
20
10
0
-55
50
60
70
80
90 100 110 120 130 140 150
o
AMBIENT TEMPERATURE ( C)
Figure 1
©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/CH.html for current information.
CHVaristor Series
Revision: August 30, 2010
Varistor Products
Surface Mount Varistors > CH Series
Peak Pulse CurrentTestWaveform
01 = Virtual Origin of Wave
T =Time from 10% to 90% of Peak
T1 = RiseTime = 1.25 xT
T2 = DecayTime
100
90
Example:
For an 8/20 μs Current Waveform:
8μs =T1 = RiseTime
20μs =T2 = DecayTime
50
10
O
T
TIME
1
T
1
Figure 2
T
2
ClampingVoltage forV22CH8 –V68CH8
ClampingVoltage forV120CH8 –V430CH8
500
4,000
MAXIMUM CLAMPING VOLTAGE
400
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 5 x 8mm
3,000 MODEL SIZE 5 x 8mm
300
100 TO 430V
RATING
C
N(DC)
22 TO 56V
o
RATING
o
o
o
N(DC)
= -55 C TO 125
T
= -55 C TO 125
2,000
A
200
T
C
A
V430CH8
V390CH8
V360CH8
1,000
900
V240CH8
100
90
80
70
60
50
40
V220CH8
V200CH8
800
V68CH8
V56CH8
V47CH8
V39CH8
V33CH8
V27CH8
V22CH8
700
600
500
400
300
200
30
20
V180CH8
V150CH8
V120CH8
10
10
100
10
-3
-2
-1
0
1
2
3
10
-3
-2
-1
0
1
2
3
4
10
10
10
10
10
10
10
10
10
10
10
10
PEAK AMPERES (A)
PEAK AMPERES (A)
Figure 3
Figure 4
Pulse Rating Curves
Surge Current Rating Curves forV22CH8 -V56CH8
Surge Current Rating Curves for V120CH8 -V430CH8
2,000
500
MODEL SIZE 5 x 8mm
V120CH8 - V430CH8
1
MODEL SIZE 5 x 8mm
V22CH8 - V56CH8
1,000
500
200
100
2
1
2
10
2
4
10
10
2
3
10
4
10
10
200
100
5
50
20
10
10
10
6
3
10
5
10
50
20
10
5
6
10
10
5
INDEFINITE
2
1
INDEFINITE
0.5
2
1
0.2
20
100
1,000
IMPULSE DURATION(μs)
10,000
20
100
1,000
IMPULSE DURATION
10,000
Figure 5
Figure 6
(μs)
NOTE: If pulse ratings are exceeded, a shift of V
(at specified current) of more than +/-10% could result. This type of shift, which normally results in a decrease of V
, may result in
N(DC)
N(DC)
the device not meeting the original published specifications, but it does not prevent the device from continuing to function, and to provide ample protection.
©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/CH.html for current information.
CHVaristor Series
Revision: August 30, 2010
Varistor Products
Surface Mount Varistors > CH 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
200
150
100
MAXIMUM TEMPERATURE
230°C
CH series devices have silver-platinum terminals (Ag/Pt),
and the recommended solder is 62/36/2 (Sn/Pb/Ag), 60/40
(Sn/Pb) or 63/37 (Sn/Pb). Littelfuse also recommends an
RMA solder flux.
40-80
SECONDS
ABOVE 183°C
RAMP RATE
<2°C/s
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.
PREHEAT DWELL
PREHEAT ZONE
50
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
When using a reflow process, care should be taken to
ensure that the CH 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.
TIME (MINUTES)
Figure 7
Wave Solder Profile
300
250
200
150
100
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.
MAXIMUMWAVE 260°C
SECOND PREHEAT
FIRST PREHEAT
50
0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
TIME (MINUTES)
Figure 8
Lead–free (Pb-free) Soldering Recommendations
CH series devices have silver-platinum terminals (Ag/Pt),
and the recommended Lead-free solder is 96.5/3.0/0.5
(SnAgCu) with an RMA flux, though there is a wide
selection of pastes and fluxes available that should be
compatible.
Lead–free Re-flow Solder Profile
300
MAXIMUM TEMPERATURE 260˚C,
TIME WITHIN 5˚C OF PEAK
20 SECONDS MAXIMUM
250
200
150
100
50
RAMP RATE
<3˚C/s
The reflow profile must be constrained by the maximums
in the Lead–free Reflow Profile. For Lead–free Wave
soldering, the Wave Solder Profile still applies.
60 - 150 SEC
> 217˚C
Note: the Lead–free paste, flux and profile were used for
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.
PREHEAT ZONE
0
0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
Figure 9
TIME (MINUTES)
©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/CH.html for current information.
CHVaristor Series
Revision: August 30, 2010
Varistor Products
Surface Mount Varistors > CH Series
Part Numbering System
V 220CH 8 X
LITTELFUSE VARISTOR
PACKAGING OPTIONS
No Letter: Standard 13 Inch Reel
T: 7 Inch Reel
S: Bulk Pack
NOMINAL VARISTOR
VOLTAGE
SERIES DESIGNATOR
RELATIVE SIZE INDICATOR
Dimensions
PAD LAYOUT DIMENSIONS
Inches
Max
Millimeters
Min Max
Symbol
Min
C
A
B
C
0.402
0.216
0.087
10.210
5.500
2.210
NOTE 1
B
2.03
1.27
8.51
5.26
D
-
0.080
0.050
0.335
0.207
-
E
L
0.016
0.311
0.185
0.41
7.90
4.70
A
W
NOTE: Avoid metal runs in this area. Soldering recommendations: Material - 62/36/2 Sn/Pb/
Ag or equivalent.Temperature – 230ºC Max., 5s. Max. Flux - R.M.A.
CHIP LAYOUT DIMENSIONS
E
L
D
W
©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/CH.html for current information.
CHVaristor Series
Revision: August 30, 2010
Varistor Products
Surface Mount Varistors > CH Series
Tape and Reel Specifications
Symbol
Parameter
Cavity Length
Size (mm)
8.5 -/+ 0.1
5.5 -/+ 0.1
2.0 Min.
K
0
D
P
B0
A0
K0
H0
0
P
P
2
E
Cavity Width
Cavity Depth
F
W
SECTION
THRU
CAVITY
B
0
Ref. Plane for A0 and B0
+ 0.10
0.3
- 0.05
A
0
T
T
R1, R2, R3
Tape Cavity Radii
0.5 Max.
1.0 Max.
1
D
1
PLAN VIEW OF STRIP
T
T1
E
CarrierTapeThickness
CoverTapeThickness
Sprocket Hole from Edge
Sprocket Hole Pitch
Sprocket Hole Diameter
K
0.1 Max.
1.75 -/+ 0.1
4.0 -/+ 0.1
T
CROSS SECTION
P0
D
(REF. PLANE FOR A & B )
0
0
R
4
+ 0.1
1.5
- 0.0
MINIMUM
BENDING
RADIUS
H
B
0
R
0
1
R
3
P2
R4
D1
K
Hole Centre to Component Centre
Min. Bending Radius
2.0 -/+ 0.15
30.5 Min.
1.5 Min.
R
K
A
2
0
0
REELED RADIUS DETAILS
Ejection Hole Diameter
OverallThickness
CAVITY DETAILS
3.0 Min.
P
Pitch Of Component
8.0 -/+ 0.1
7.5 -/+ 0.1
16.0 -/+ 0.3
F
Sprocket Hole to Ejection Hole
CarrierTape Width
W
Notes :
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Standard Packaging*
Special Packaging
CH Series varistors are always shipped in tape and reel.
The standard 13-inch reel utilized contains 4000 pieces.
Option 1 7-inch reels containing 1000 pieces are
available. To order 7-inch reels add a 'T' suffix to
the part number; e.g., V47CH8T.
Option 2 For small quantities (less than 100 pieces) the
units are shipped bulk pack. To order, add a 'S'
suffix to the part number; e.g., V47CH8S.
Note also that the CH Series receives no branding on the
chip itself.
*NOTE: It is recommended that parts be kept in the sealed
bag provided and that parts be used as soon as possible
when removed from bags.
©2010 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/CH.html for current information.
CHVaristor Series
Revision: August 30, 2010
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