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C1812C471JHRACTM

Ceramic Capacitor, Multilayer, Ceramic, 3000V, X7R, -/+15ppm/Cel TC, 0.00047uF, 1812

器件类别:无源元件    电容器   

厂商名称:KEMET(基美)

厂商官网:http://www.kemet.com

器件标准:

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器件参数
参数名称
属性值
是否Rohs认证
符合
厂商名称
KEMET(基美)
包装说明
, 1812
Reach Compliance Code
compli
ECCN代码
EAR99
电容
0.00047 µF
电容器类型
CERAMIC CAPACITOR
介电材料
CERAMIC
高度
1.6 mm
JESD-609代码
e3
长度
4.5 mm
多层
Yes
负容差
5%
端子数量
2
最高工作温度
125 °C
最低工作温度
-55 °C
封装形式
SMT
包装方法
TR, Plastic, 7 Inch
正容差
5%
额定(直流)电压(URdc)
3000 V
尺寸代码
1812
温度特性代码
X7R
温度系数
-/+15ppm/Cel ppm/°C
端子面层
MATTE TIN OVER NICKEL
宽度
3.2 mm
文档预览
Surface Mount Multilayer Ceramic Chip Capacitors (SMD MLCCs)
High Voltage X7R Dielectric, 500 – 3,000 VDC
(Commercial & Automotive Grade)
Overview
KEMET’s high voltage surface mount MLCCs in X7R
Dielectric feature a 125°C maximum operating temperature
and are considered “temperature stable.” The Electronics
Industries Alliance (EIA) characterizes X7R dielectric as a
Class II material. Components of this classification are fixed,
ceramic dielectric capacitors suited for bypass and decoupling
applications or for frequency discriminating circuits where Q
and stability of capacitance characteristics are not critical. X7R
exhibits a predictable change in capacitance with respect to
time and voltage and boasts a minimal change in capacitance
with reference to ambient temperature. Capacitance change is
limited to ±15% from -55°C to +125°C.
Available in a variety of case sizes and industry leading CV
values (capacitance/voltage), these devices exhibit low leakage
current and low ESR at high frequencies. Conventional uses
include both snubbers and filters in applications such as
switching power supplies and lighting ballasts. Their exceptional
performance at high frequencies has made high voltage MLCC's
the preferred dielectric choice of design engineers worldwide.
In addition to their use in power supplies, these capacitors
are widely used in industries related to automotive (hybrid),
telecommunications, medical, military, aerospace, semiconductors
and test/diagnostic equipment.
Automotive Grade is available for applications requiring proven,
reliable performance in harsh environments. Whether under-hood
or in-cabin, these capacitors are designed for mission and safety
critical automotive circuits. Stricter testing protocol and inspection
criteria have been established for automotive grade products
in recognition of potentially harsh environmental conditions.
KEMET automotive grade series capacitors meet the demanding
Automotive Electronics Council's AEC–Q200 qualification
requirements.
Ordering Information
C
Ceramic
1210
C
154
Capacitance
Code (pF)
2 Significant
Digits + Number
of Zeros
K
Capacitance
Tolerance
J = ±5%
K = ±10%
M = ±20%
C
Voltage
C = 500 V
B = 630 V
D = 1,000 V
F = 1,500 V
G = 2,000 V
Z = 2,500 V
H = 3,000 V
R
Dielectric
R = X7R
A
C
TU
Packaging/Grade
(C-Spec)
2
Blank = Bulk
TU = 7" Reel
Unmarked
TM = 7" Reel Marked
AUTO = Automotive
Grade 7" Reel
Unmarked
Case Size Specification/
(L" x W")
Series
0805
1206
1210
1808
1812
1825
2220
2225
C = Standard
Failure Rate/
Termination Finish
1
Design
A = N/A
C = 100% Matte Sn
L = SnPb (5%
minimum)
Additional termination finish options may be available. Contact KEMET for details.
SnPb termination finish option is not available on Automotive Grade product.
2
Additional reeling or packaging options may be available. Contact KEMET for details.
1
1, 2
One world. One KEMET
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com
C1010_X7R_HV_SMD • 1/8/2013
1
Surface Mount Multilayer Ceramic Chip Capacitors, (SMD MLCCs)
High Voltage X7R Dielectric, 500 – 3,000 VDC (Commercial & Automotive Grade)
Dimensions – Millimeters (Inches)
W
T
S
L
B
EIA
Size
Code
0805
1206
1210
1808
1812
1825
2220
2225
Metric
Size
Code
2012
3216
3225
4520
4532
4564
5650
5664
L
Length
W
Width
T
Thickness
B
Bandwidth
0.50 (0.02) ± 0.25 (.010)
0.50 (0.02) ± 0.25 (.010)
0.50 (0.02) ± 0.25 (.010)
S
Separation
Minimum
0.75 (.030)
Mounting
Technique
Solder Wave or
Solder Reflow
2.00 (.079) ± 0.20 (.008) 1.25 (.049) ± 0.20 (.008)
3.20 (.126) ± 0.20 (.008) 1.60 (.063) ± 0.20 (.008)
3.20 (.126) ± 0.20 (.008) 2.50 (.098) ± 0.20 (.008)
4.70 (.185) ± 0.50 (.020) 2.00 (.079) ± 0.20 (.008) See Table 2 for 0.60 (.024) ± 0.35 (.014)
Thickness
4.50 (.177) ± 0.30 (.012) 3.20 (.126) ± 0.30 (.012)
0.60 (.024) ± 0.35 (.014)
4.50 (.177) ± 0.30 (.012) 6.40 (.252) ± 0.40 (.016)
5.70 (.224) ± 0.40 (.016) 5.00 (.197) ± 0.40 (.016)
5.60 (.220) ± 0.40 (.016) 6.40 (.248) ± 0.40 (.016)
0.60 (.024) ± 0.35 (.014)
N/A
Solder Reflow Only
0.60 (.024) ± 0.35 (.014)
Benefits
-55°C to +125°C operating temperature range
Industry-leading CV values
Exceptional performance at high frequencies
Pb-Free and RoHS Compliant
EIA 0805, 1206, 1210, 1808, 1812, 1825, 2220, and
2225 case sizes
• DC voltage ratings of 500 V, 630 V, 1 KV, 1.5 KV, 2 KV,
2.5 KV, and 3 KV
• Capacitance offerings ranging from 10 pF to 0.33 μF
Available capacitance tolerances of ±5%, ±10%, and ±20%
Low ESR and ESL
Non-polar device, minimizing installation concerns
Commercial and Automotive (AEC–Q200) grades available
100% pure matte tin-plated termination finish allowing for
excellent solderability
• SnPb plated termination finish option available upon request (5%
minimum)
Applications
Typical applications include switch mode power supplies (input filters, resonators, tank circuits, snubber circuits, output filters), high
voltage coupling and DC blocking, lighting ballasts, voltage multiplier circuits, DC/DC converters and coupling capacitors in Ćuk
converters. Markets include power supply, LCD fluorescent backlight ballasts, HID lighting, telecom equipment, industrial and medical
equipment/control, LAN/WAN interface, analog and digital modems, and automotive (electric and hybrid vehicles, charging stations and
lighting) applications.
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com
C1010_X7R_HV_SMD • 1/8/2013
2
Ceramic Surface Mount
0.60 (.024) ± 0.35 (.014)
Surface Mount Multilayer Ceramic Chip Capacitors, (SMD MLCCs)
High Voltage X7R Dielectric, 500 – 3,000 VDC (Commercial & Automotive Grade)
Application Note
X7R dielectric is not recommended for AC line filtering or pulse applications.
Qualification/Certification
Commercial Grade products are subject to internal qualification. Details regarding test methods and conditions are referenced in
Table 4, Performance & Reliability.
Automotive Grade products meet or exceed the requirements outlined by the Automotive Electronics Council. Details regarding test
methods and conditions are referenced in document AEC–Q200, Stress Test Qualification for Passive Components. For additional
information regarding the Automotive Electronics Council and AEC–Q200, please visit their website at www.aecouncil.com.
Environmental Compliance
Pb-Free and RoHS Compliant (excluding SnPb termination finish option).
Electrical Parameters/Characteristics
Item
Operating Temperature Range
Capacitance Change with Reference to +25°C and 0 VDC Applied (TCC)
Aging Rate (Maximum % Capacitance Loss/Decade Hour)
Dielectric Withstanding Voltage (DWV)
Dissipation Factor (DF) Maximum Limit @ 25ºC
Insulation Resistance (IR) Limit @ 25°C
-55°C to +125°C
±15%
3.0%
150% of rated voltage for voltage rating of < 1,000 V
120% of rated voltage for voltage rating of ≥ 1,000 V
(5 ±1 second and charge/discharge not exceeding 50 mA)
2.5%
See Insulation Resistance Limit Table
(500 VDC applied for 120 ±5 seconds @ 25°C)
Parameters/Characteristics
Regarding aging rate: Capacitance measurements (including tolerance) are indexed to a referee time of 1,000 hours.
To obtain IR limit, divide MΩ-µF value by the capacitance and compare to GΩ limit. Select the lower of the two limits.
Capacitance and dissipation factor (DF) measured under the following conditions:
1 kHz ±50 Hz and 1.0 ±0.2 Vrms if capacitance ≤ 10 µF
120 Hz ±10 Hz and 0.5 ±0.1 Vrms if capacitance > 10 µF
Note: When measuring capacitance it is important to ensure the set voltage level is held constant. The HP4284 and Agilent E4980 have a feature known as
Automatic Level Control (ALC). The ALC feature should be switched to "ON."
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com
C1010_X7R_HV_SMD • 1/8/2013
3
Surface Mount Multilayer Ceramic Chip Capacitors, (SMD MLCCs)
High Voltage X7R Dielectric, 500 – 3,000 VDC (Commercial & Automotive Grade)
Post Environmental Limits
High Temperature Life, Biased Humidity, Moisture Resistance
Dielectric
Rated DC
Voltage
> 25
X7R
16/25
< 16
All
Capacitance
Value
Dissipation Factor
(Maximum %)
3.0
5.0
7.5
±20%
10% of Initial Limit
Capacitance
Shift
Insulation
Resistance
Insulation Resistance Limit Table (X7R Dielectric)
EIA Case Size
0805
1206
1210
1808
1812
≥ 1825
1,000 Megohm
Microfarads or 100 GΩ
< 0.0039 µF
< 0.012 µF
< 0.033 µF
< 0.018 µF
< 0.027 µF
All
100 Megohm
Microfarads or 10 GΩ
≥ 0.0039 µF
≥ 0.012 µF
≥ 0.033 µF
≥ 0.018 µF
≥ 0.027 µF
All
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com
C1010_X7R_HV_SMD • 1/8/2013
4
Surface Mount Multilayer Ceramic Chip Capacitors, (SMD MLCCs)
High Voltage X7R Dielectric, 500 – 3,000 VDC (Commercial & Automotive Grade)
Table 1A – Capacitance Range/Selection Waterfall (0805 – 1812 Case Sizes)
Series
Capacitance
10 pF
11 pF
12 pF
13 pF
15 pF
16 pF
18 pF
20 pF
22 pF
24 pF
27 pF
30 pF
33 pF
36 pF
39 pF
43 pF
47 pF
51 pF
56 pF
62 pF
68 pF
75 pF
82 pF
91 pF
100 pF
110 pF
120 pF
130 pF
150 pF
180 pF
220 pF
270 pF
330 pF
390 pF
470 pF
560 pF
680 pF
820 pF
1,000 pF
1,200 pF
1,500 pF
1,800 pF
2,000 pF
2,200 pF
2,700 pF
3,300 pF
3,900 pF
4,700 pF
5,600 pF
6,800 pF
8,200 pF
10,000 pF
12,000 pF
C0805
C
500
B
630
D
1000
C
500
C1206
B
630
D
1000
F
1500
G
2000
C
500
C1210
B
630
D
1000
F
1500
G
2000
C
500
B
630
C1808
D
1000
F
1500
G
2000
Z
2500
H
3000
C
500
B
630
C1812
D
1000
F
1500
G
2000
Z
2500
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
2500
Z
H
3000
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
3000
H
Cap
Code
100
110
120
130
150
160
180
200
220
240
270
300
330
360
390
430
470
510
560
620
680
750
820
910
101
111
121
131
151
181
221
271
331
391
471
561
681
821
102
122
152
182
202
222
272
332
392
472
562
682
822
103
123
Voltage Code
Voltage DC
Capacitance
Tolerance
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
M
J
K
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
J
K
M
Voltage DC
Product Availability and Chip Thickness Codes - See Table 2 for Chip Thickness Dimensions
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
500
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
DG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EG
EG
EG
EG
EG
EG
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EG
EG
EG
EG
500
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EG
EG
EG
EG
EG
EG
EG
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EG
EG
EG
EJ
630
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EG
EG
EG
EG
EG
EG
EG
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EF
EG
EG
EG
EJ
1000
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EF
EF
EF
EF
EF
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
EG
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FG
FG
FG
FG
FG
FG
FG
FG
FG
FG
FG
FM
FM
FK
FK
FK
FK
FS
FS
FL
FL
FL
FL
FL
FL
FL
500
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FG
FG
FG
FG
FG
FG
FG
FM
FM
FM
FM
FM
FK
FS
FS
FL
FL
FL
FL
FL
FL
FL
FL
FL
FL
FL
630
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FG
FG
FG
FG
FG
FG
FG
FM
FM
FM
FM
FM
FK
FS
FS
FL
FL
FL
FL
FL
FL
FL
FL
FL
FL
FL
1000
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FK
FK
FK
FS
FS
FS
FL
FL
FL
FL
FL
FL
FL
FL
FL
FL
FL
FM
FM
FK
FK
FK
1500
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FM
FK
FK
FS
FS
FL
FL
FL
FL
FM
FM
FM
FM
FM
FM
FM
FK
FK
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LA
LA
LA
LA
LA
LA
LA
LA
LA
LA
LB
LB
LB
LC
LC
LC
LC
LC
LC
LA
LA
LA
LA
LA
LA
LA
LA
500
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LA
LA
LA
LA
LA
LA
LA
LA
LB
LB
LB
LB
LB
LC
LC
LC
LA
LA
LA
LA
LA
LA
LB
LB
LB
LB
LC
630
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LA
LA
LA
LA
LA
LA
LA
LA
LB
LB
LB
LB
LB
LC
LC
LC
LA
LA
LA
LA
LA
LA
LB
LB
LB
LB
LC
1000
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LA
LA
LA
LA
LA
LB
LB
LB
LC
LC
LA
LA
LA
LB
LB
LB
LB
LB
LB
LB
LB
LB
LC
LC
LC
LC
1500
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LC
LC
LC
LC
LB
LB
LB
LB
LB
LB
LC
LC
LC
LC
LC
LC
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LC
LC
LC
LC
LC
LC
LC
LC
LC
LB
LB
LB
LC
LC
LC
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LB
LC
LC
LC
LC
LC
LC
LC
LC
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GH
GH
GH
GK
GK
GH
GH
GH
GH
GH
GK
GK
GK
GK
GK
GK
GK
GH
GH
GH
GH
GH
GH
500
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GH
GH
GH
GK
GK
GH
GH
GH
GH
GK
GK
GK
GK
GK
GH
GH
GH
GH
GH
GH
GH
GH
GK
630
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GH
GH
GH
GK
GK
GH
GH
GH
GH
GK
GK
GK
GK
GK
GH
GH
GH
GH
GH
GH
GH
GH
GK
1000
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GH
GH
GH
GK
GK
GK
GK
GK
GH
GH
GH
GH
GH
GH
GH
GH
GH
GH
GK
GK
GK
GK
GK
1500
F
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GK
GH
GH
GH
GK
GK
GH
GH
GH
GH
GH
GH
GH
GH
GH
GK
GK
GK
2000
3000
2000
2000
Capacitance
Cap
Code
Voltage Code
C
B
D
C
B
D
F
G
C
B
D
F
G
C
B
D
F
G
Z
H
C
B
D
Series
C0805
C1206
C1210
C1808
C1812
KEMET reserves the right to substitute product with an improved temperature characteristic, tighter capacitance tolerance and/or higher voltage capability within
the same form factor (configuration and dimensions).
© KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com
C1010_X7R_HV_SMD • 1/8/2013
5
Roll Over for
Order Info.
2000
G
2500
1000
1500
630
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A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 AA AB AC AD AE AF AG AH AI AJ AK AL AM AN AO AP AQ AR AS AT AU AV AW AX AY AZ B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 BA BB BC BD BE BF BG BH BI BJ BK BL BM BN BO BP BQ BR BS BT BU BV BW BX BY BZ C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 CA CB CC CD CE CF CG CH CI CJ CK CL CM CN CO CP CQ CR CS CT CU CV CW CX CY CZ D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF DG DH DI DJ DK DL DM DN DO DP DQ DR DS DT DU DV DW DX DZ
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