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18121Cxxx Datasheet PDF - AVX Corporation

Part Number 18121Cxxx
Description X7R Dielectric
Manufacturers AVX Corporation 
Logo AVX Corporation Logo 

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18121Cxxx datasheet, circuit
X7R Dielectric
General Specifications
X7R formulations are called “temperature stable” ceramics
and fall into EIA Class II materials. X7R is the most popular
of these intermediate dielectric constant materials. Its tem-
perature variation of capacitance is within ±15% from
-55°C to +125°C. This capacitance change is non-linear.
Capacitance for X7R varies under the influence of electrical
operating conditions such as voltage and frequency.
X7R dielectric chip usage covers the broad spectrum of
industrial applications where known changes in capaci-
tance due to applied voltages are acceptable.
PART NUMBER (see page 2 for complete part number explanation)
0805
5
C 103 M
A
T
2
A
Size
(L" x W")
Voltage
6.3V = 6
10V = Z
16V = Y
25V = 3
50V = 5
100V = 1
200V = 2
Dielectric
X7R = C
Capacitance
Code (In pF)
2 Sig. Digits +
Number of
Zeros
Capacitance
Tolerance
Preferred
J = ± 5%
K = ±10%
M = ± 20%
Failure
Rate
A = Not
Applicable
Terminations
T = Plated Ni
and Sn
7 = Gold
Plated
Packaging
2 = 7" Reel
4 = 13" Reel
7 = Bulk Cass.
9 = Bulk
Contact
Factory For
Multiples
Special
Code
A = Std.
Product
X7R Dielectric
Typical Temperature Coefficient
10
5
0
-5
-10
-15
-20
-25
-60 -40 -20 0 20 40 60 80 100 120 140
Temperature °C
Variation of Impedance with Cap Value
Impedance vs. Frequency
1,000 pF vs. 10,000 pF - X7R
0805
10.00
1,000 pF
10,000 pF
1.00
Capacitance vs. Frequency
+30
+20
+10
0
-10
-20
-30
1KHz
10 KHz
100 KHz
Frequency
1 MHz
10 MHz
Insulation Resistance vs Temperature
10,000
1,000
100
0
0 20 40 60 80 100 120
Temperature °C
Variation of Impedance with Chip Size
Impedance vs. Frequency
10,000 pF - X7R
10 1206
0805
1210
1.0
Variation of Impedance with Chip Size
Impedance vs. Frequency
100,000 pF - X7R
10
1206
0805
1210
1.0
0.10 0.1 0.1
0.01
10
100
Frequency, MHz
1000
.01
1
10 100
Frequency, MHz
1,000
.01
1
10 100
Frequency, MHz
1,000
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18121Cxxx equivalent
High Voltage Chips
For 500V to 5000V Applications
High value, low leakage and small size are difficult parameters to obtain
in capacitors for high voltage systems. AVX special high voltage MLC
chips capacitors meet these performance characteristics and are
designed for applications such as snubbers in high frequency power
converters, resonators in SMPS, and high voltage coupling/DC blocking.
These high voltage chip designs exhibit low ESRs at high frequencies.
Larger physical sizes than normally encountered chips are used to
make high voltage chips. These larger sizes require that special pre-
cautions be taken in applying these chips in surface mount assem-
blies. This is due to differences in the coefficient of thermal expansion
(CTE) between the substrate materials and chip capacitors. Apply heat
at less than 4°C per second during the preheat. Maximum preheat
temperature must be within 50°C of the soldering temperature.
The solder temperature should not exceed 230°C. Chips 1808 and
larger to use reflow soldering only.
Capacitors with X7R Dielectrics are not intended for AC line filtering
applications.
Contact plant for recommendations. Capacitors may require protective
surface coating to prevent external arcing.
PART NUMBER (see page 2 for complete information and options)
1808
A
A 271 K
A
1
1A
AVX
Style
1206
1210
1808
1812
1825
2220
2225
3640
Voltage
7 = 500V
C = 600V
A = 1000V
S = 1500V
G = 2000V
W = 2500V
H = 3000V
J = 4000V
K = 5000V
Temperature Capacitance Capacitance
Coefficient
Code
Tolerance
A = C0G (2 significant digits C0G: J = ±5%
C = X7R
+ no. of zeros)
Examples:
K = ±10%
M = ±20%
10 pF = 100 X7R: K = ±10%
100 pF = 101
M = ±20%
1,000 pF = 102
Z = +80%,
22,000 pF = 223
-20%
220,000 pF = 224
1 µF = 105
Failure
Rate
A=Not
Applicable
Termination
1= Pd/Ag
T = Plated Ni
and Solder
W
L
Packaging/Marking
1A = 7" Reel
Unmarked
3A = 13" Reel
Unmarked
9A = Bulk/Unmarked
T
t
DIMENSIONS
millimeters (inches)
SIZE
1206
1210
1808*
1812*
1825*
2220*
2225*
3640*
(L) Length
3.20 ± 0.2
3.20 ± 0.2 4.57 ± 0.25 4.50 ± 0.3
4.50 ± 0.3
5.7 ± 0.4
5.72 ± 0.25 9.14 ± 0.25
(0.126 ± 0.008) (0.126 ± 0.008) (0.180 ± 0.010) (0.177 ± 0.012) (0.177 ± 0.012) (0.224 ± 0.016) (0.225 ± 0.010) (0.360 ± 0.010)
(W) Width
1.60 ± 0.2
2.50 ± 0.2 2.03 ± 0.25 3.20 ± 0.2
6.40 ± 0.3
5.0 ± 0.4
6.35 ± 0.25 10.2 ± 0.25
(0.063 ± 0.008) (0.098 ± 0.008) (0.080 ± 0.010) (0.126 ± 0.008) (0.252 ± 0.012) (0.197 ± 0.016) (0.250 ± 0.010) (0.400 ± 0.010)
(T) Thickness
Max.
1.52
(0.060)
1.70
(0.067)
2.03
(0.080)
2.54
(0.100)
2.54
(0.100)
3.3
(0.130)
2.54
(0.100)
2.54
(0.100)
(t) terminal
min.
max.
0.25 (0.010) 0.25 (0.010) 0.25 (0.010) 0.25 (0.010) 0.25 (0.010)
0.75 (0.030) 0.75 (0.030) 1.02 (0.040) 1.02 (0.040) 1.02 (0.040)
0.25 (0.010)
1.02 (0.040)
0.25 (0.010) 0.76 (0.030)
1.02 (0.040) 1.52 (0.060)
*Reflow Soldering Only
39

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