Dielectric Characteristics
CLASS I DIELECTRICS
Multilayer Ceramic Capacitors are generally divided into classes,
which are defined by the capacitance temperature characteristics
over specified temperature ranges. These are designated by alpha-
numeric codes. Code definitions are summarized below and are also
available in the relevant national and international specifications.
dielectric characteristics with negligible dependence of
capacitance and dissipation factor with time, voltage and
frequency. They exhibit the following characteristics:
a) Time does not significantly affect capacitance and dissipation
factor (Tan δ) – no aging.
Capacitors within this class have a dielectric constant range from 10
to 100. They are used in applications that require ultra stable
b) Capacitance and dissipation factor are not affected by voltage.
c) Linear temperature coefficient.
CLASS I DIELECTRICS
C0G/NP0 (1B) (Porcelain)
P90 (Porcelain)
C0G/NP0 (1B)
X8G
Class I High Temperature
-
Ultra Stable
Ultra Stable
Ultra Stable
1B/CG
Ultra Stable
Ultra Stable
IECQ-CECC
EIA
-
-
-
-
-
-
-
-
-
Dielectric
classifications
C0G/NP0 (1B)
P90
C0G/NP0 (1B)
X8G
MIL
-
-
CG (BP)
-
DLI
Novacap
Syfer
CF
AH
-
-
-
N, RN
C
-
-
-
F
-
-
D, RD
G
-
-
-
-
Ordering code
Q, U
H
Voltronics
-
F
H
Q
-
-
-
-
Rated
temperature range
-55ºC to +125ºC
-55ºC to +125ºC
-55ºC to +125ºC
-55ºC to +125ºC
-55ºC to +150ºC
-55ºC to +160ºC
-55ºC to +200ºC
No DC
voltage applied
Maximum
capacitance
change over
0
15 ppm/ºC
+90 20 ppm/ºC
0
30 ppm/ºC
0
30 ppm/ºC
-
0
30 ppm/ºC
0
30 ppm/ºC
0
30 ppm/ºC
Rated DC
voltage applied
temperature range
>50pF ≤0.0015
≤50pF
0.0015 (15/Cr + 0.7)
Tangent of loss
angle (tan ð)
-
≤0.0005 @1MHz
≤0.0005 @1MHz
≤0.0005 @1MHz
≤0.001
@25ºC = 100GΩ or 1000ΩF
@160ºC & 200ºC = 1GΩ or
10ΩF (whichever is the least)
Insulation
resistance (Ri)
Time constant
(Ri x Cr)
@25ºC = 106 MΩ min
@125ºC = 105 MΩ min
100GΩ or 1000s
(whichever is the least)
Cr <4.7pF
Cr≥ 4.7 to <10pF
Cr ≥ 10pF
0.05pF, 0.10pF, 0.25pF, 0.5pF
0.10pF, 0.25pF, 0.5pF
1ꢀ, 2ꢀ, 5ꢀ, 10ꢀ
Capacitance
tolerance
≤200V
2.5 times
Dielectric strength.
Voltage applied
for 5 seconds.
Charging
>200V to <500V
500V to ≤ 1kV
2.5 times
Rated voltage +250V
1.5 times
2.5 times
current limited
to 50mA maximum.
>1kV to ≤ 1.2kV
>1.2kV
1.25 times
1.2 times
-
N/A
Chip
-
-
-
-
-
-
55/125/56
-
-
-
Climatic
category (IEC)
Dipped
-
-
55/125/21
55/125/56
-
-
Discoidal
Aging
characteristic
(Typical)
-
Zero
Approvals
Syfer Chip
-
-
-
QC-32100
-
-
4
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