Standard range - 10Vdc to 6kVdc
X8R High Temperature capacitors
TCC/VCC capacitors
High Q capacitors
Copper Barrier capacitors
Open Mode and Tandem capacitors
IECQ-CECC range
AEC-Q200 range
S02A Space grade range
Safety Certified capacitors
250Vac Non Safety rated AC capacitors
115Vac 400Hz & DWV ranges
LCD Inverter chip range
E01 & E07 feedthrough chip capacitors
X2Y Integrated Passive Components
Radial Leaded capacitors
Introduction to Syfer Technology
Contents
First in the market with flexible polymer
terminations - the revolutionary FlexiCap™
capacitors - our capacitor range also includes X8R
high temperature types, High Q capacitors and
other application specific types. Our renowned high
voltage MLCC expertise has led to the development
of an impressive range with working voltage
capability up to 10kV. This includes surface mount
Class ‘X’ and ‘Y’ approved Safety Certified capacitors,
0603 chips with working voltages up to 500V, and
0805 types up to 1kV.
As part of the Dover Ceramic & Microwave Products
group (CMP), we are able to offer unrivalled product
quality with short lead-times, backed up by excellent
sales and technical support. With a commitment
to product innovation, new ranges are continually
being developed.
Our experienced applications engineers are also
available to provide custom solutions for specific
applications. This catalogue details the standard
ranges but we can provide items such as tight
tolerance, low profile and non standard sizes on
request. Flexibility is key, not only in design but in
all aspects of customer service and support.
Our quality management systems meet
international requirements, with approval to
IS0 9001, environmental approval to IS0 14001
and Occupational Health and Safety approval to
OHSAS 18001. Product approvals include, IECQ-
CECC, UL, TÜV and qualification to AEC-Q200.
SPC is used extensively, supported by Continuous
Improvement Programmes, 6 Sigma projects and
Lean Manufacturing initiatives.
Products
Syfer’s excellence in ceramic materials technology,
has enabled us to offer an unrivalled range of
multilayer ceramic products including:
l
Multilayer ceramic chip capacitors
l
High voltage MLCCs
l
FlexiCap™ capacitors with flexible terminations
l
Class ‘X’ and ‘Y’ SMD Safety Certified capacitors
l
Radial leaded capacitors
l
AEC-Q200 qualified capacitors
l
IECQ CECC approved capacitors and radials
l
Capacitors for space applications
l
High Q capacitors
l
Non Magnetic capacitors
l
3 terminal EMI chips
l
X2Y Integrated Passive Components
l
Capacitors for medical applications
Syfer -
Innovative, World-Class
Ceramic Capacitors
General introduction
2
Definitions of Ultra-Stable and Stable
3
Dielectric characteristics
4
Capacitance, Impedance and E.S.R. vs Frequency
5
Ageing, capacitance measurements and tight tolerance capacitors
6
Production processes and reliability
7
FlexiCap™ overview
8
Testing and termination types
9
Documentation and compliance
10
IECQ-CECC and AEC-Q200 periodic tests
11
Handling notes
12
Soldering information
13
Chip dimensions
14-15
Product Selector
Ceramic Chip capacitors
Standard MLCC ranges - 10Vdc to 6kVdc - C0G/NP0 & X7R
X8R High Temperature capacitors
TCC/VCC range
High Q capacitors - MS range
Copper Barrier capacitors
Open Mode & Tandem capacitors
IECQ-CECC ranges
AEC-Q200 ranges
S02A Space grade ranges
Safety Certified capacitors
250Vac Non Safety Rated AC capacitors
115Vac 400Hz & DWV ranges
LCD Inverter chip range
Surface Mount EMI filters
E01 & E07 feedthrough capacitors
X2Y Integrated Passive Components
Packaging information - Ceramic chip capacitors
Radial Leaded capacitors
Packaging information - Radial leaded capacitors
16-18
19
20-21
22-23
24-25
26
27
28
29
30-32
33
34
35
36-37
38-39
40-41
42-47
48-49
Benefits
l
High quality and reliability
l
World-leading high voltage expertise
l
Suitable for the most demanding applications
including: automotive, aerospace, military,
space and medical
l
Approvals to international specifications
l
Continual product improvement and innovation
l
Tight tolerances available
l
Large case sizes, up to 8060
l
Custom product capability
l
Strong technical support
l
Short lead-times
l
Environmentally responsible
Suffix code controlled items such as Low profile, defined
thickness and custom lead forms available by special request.
Other Syfer products
l
l
l
l
l
l
l
l
l
Surface mount Pi filters
Panel mount threaded filters
Panel mount solder-in filters
Custom filter assembly capability
Varistor filters
Discoidal capacitors
Planar capacitor and planar varistor arrays
EMI Power Filters
Hermetically sealed EMI filters
MLCC standard range
Notes: 1) Capacitance in F. 2) *These parts may require conformal coating post soldering. 3) T = Maximum thickness.
10V - 6kVdc
Contents
10V
C0G/
NP0
X7R
X5R
C0G/
NP0
16V
X7R
X5R
C0G/
NP0
25V
X7R
X5R
50/63V
C0G/
NP0
X7R
X5R
56n
-
68n
270n
-
330n
560n
-
680n
1.2µ
-
1.5µ
820n
-
1.0µ
2.7µ
-
3.3µ
—
2.2µ
-
6.8µ
—
3.9µ
-
6.8µ
—
3.9µ
-
10µ
—
100v
C0G/
NP0
X7R
200/
250V
C0G/
NP0
X7R
500V
C0G/
NP0
X7R
630V
C0G/
NP0
—
1.0p
-
560p
1.0p
-
1.5n
3.9p
-
3.9n
4.7p
-
3.9n
10p
-
10n
12n
10p
-
22n
27n
10p
-
18n
22n
-
33n
10p
-
22n
27n
-
39n
10p
-
68n
82n
-
100n
390p
-
120n
150n
-
180n
680p
-
220n
270n
-
390n
X7R
1kV
C0G/
NP0
—
1.0p
-
180p
1.0p
-
1.0n
3.9p
-
2.2n
4.7p
-
2.2n
10p
-
6.8n
8.2n
10p
-
12n
15n
10p
-
15n
18n
-
22n
10p
-
18n
22n
-
27n
10p
-
47n
56n
-
82n
390p
-
82n
100n
-
150n
680p
-
150n
180n
-
270n
X7R
1.2kV
C0G/
NP0
—
1.0p
-
120p
1.0p
-
680p
3.9p
-
1.5n
4.7p
-
1.5n
10p
-
4.7n
5.6n
-
6.8n
10p
-
6.8n
8.2n
-
10n
10p
-
10n
12n
-
15n
10p
-
12n
15n
-
22n
10p
-
33n
39n
-
56n
390p
-
68n
82n
-
100n
680p
-
100n
120n
-
180n
X7R
1.5kV
C0G/
NP0
—
1.0p
-
82p
1.0p
-
330p
3.9p
-
820p
4.7p
-
1.0n
10p
-
2.7n
3.3n
10p
-
4.7n
5.6n
-
6.8n
10p
-
5.6n
6.8n
-
10n
10p
-
6.8n
8.2n
-
12n
10p
-
22n
27n
-
39n
390p
-
39n
47n
-
68n
680p
-
68n
82n
-
120n
X7R
2kV
C0G/
NP0
—
1.0p
-
39p
1.0p
-
220p
3.9p
-
390p
4.7p
-
470p
10p
-
1.5n
1.8n
10p
-
3.3n
3.9n
10p
-
3.3n
3.9n
-
5.6n
10p
-
4.7n
5.6n
-
6.8n
10p
-
10n
12n
-
18n
390p
-
22n
27n
-
39n
680p
-
39n
47n
-
68n
X7R
2.5kV
C0G/
NP0
—
X7R
3kV
C0G/
NP0
—
X7R
4kV
C0G/
NP0
—
X7R
5kV
C0G/
NP0
—
X7R
6kV
C0G/
NP0
—
X7R
Syfer -
Innovative, World-Class
Ceramic Capacitors
0603
0805
1206
1210
1808
(T=2.5mm)
0603
0805
1206
1210
1808
1812
T=2.5mm
0.47p
100p
-
-
3.9n
100n
1.0p
-
15n
1.0p
-
47n
3.9p
-
100n
4.7p
-
100n
10p
-
220n
—
10p
-
470n
—
10p
-
470n
—
10p
-
560n
—
100p
-
330n
100p
-
1.0µ
330p
-
1.5µ
100p
-
1.5µ
150p
-
3.3µ
—
220p
-
4.7µ
—
220p
-
5.6µ
—
330p
-
6.8µ
—
120n
0.47p
100p
-
-
-
150n
2.7n
100n
390n
-
680n
1.2µ
-
1.5µ
1.8µ
-
3.3µ
1.8µ
-
2.7µ
3.9µ
-
10µ
—
5.6µ
-
15µ
—
6.8µ
-
18µ
—
8.2µ
-
22µ
—
1.0p
-
12n
1.0p
-
33n
3.9p
-
68n
4.7p
-
68n
10p
-
180n
—
10p
-
330n
—
10p
-
330n
—
10p
-
470n
—
100p
-
330n
100p
-
1.0µ
330p
-
1.5µ
100p
-
1.5µ
150p
-
3.3µ
—
220p
-
4.7µ
—
220p
-
5.6µ
—
330p
-
6.8µ
—
120n
390n
-
470n
1.2µ
1.8µ
-
2.7µ
1.8µ
-
2.2µ
3.9µ
-
6.8µ
—
5.6µ
-
12µ
—
6.8µ
-
12µ
—
8.2µ
-
15µ
—
0.47p
100p
-
-
2.2n
100n
1.0p
-
10n
1.0p
-
27n
3.9p
-
56n
4.7p
-
47n
10p
-
150n
—
10p
-
220n
—
10p
-
220n
—
10p
-
330n
—
100p
-
220n
100p
-
820n
330p
-
1.2µ
100p
-
1.2µ
150p
-
2.2µ
—
220p
-
3.9µ
—
220p
-
4.7µ
—
330p
-
5.6µ
—
—
270n
-
390n
1.0µ
1.5µ
-
2.2µ
1.5µ
2.7µ
-
4.7µ
—
4.7µ
-
10µ
—
5.6µ
-
10µ
—
6.8µ
-
12µ
—
0.47p
100p
-
-
1.5n
47n
1.0p
-
5.6n
1.0p
-
22n
3.9p
-
33n
4.7p
-
33n
10p
-
100n
—
10p
-
150n
—
10p
-
150n
—
10p
-
220n
—
10p
-
330n
—
390p
-
680n
—
680p
-
1.0µ
—
100p
-
220n
100p
-
470n
330p
-
1.0µ
100p
-
680n
150p
-
2.2µ
—
220p
-
1.8µ
—
220p
-
3.3µ
—
330p
-
3.3µ
—
470p
-
10µ
—
1.0n
-
15µ
—
2.2n
-
22µ
—
0.47p
100p
0.47p
100p
0.47p
100p
-
-
-
-
-
-
470p
33n
220p
10n
150p*
1.5n*
1.0p
-
2.2n
1.0p
-
8.2n
3.9p
-
18n
4.7p
-
18n
10p
-
47n
—
10p
-
68n
—
10p
-
68n
—
10p
-
82n
—
10p
-
270n
—
390p
-
470n
—
680p
-
680n
—
100p
-
100n
100p
-
330n
330p
-
680n
100p
-
560n
150p
-
1.5µ
—
220p
-
1.5µ
—
220p
-
2.2µ
—
330p
-
2.7µ
—
470p
-
5.6µ
—
1.0n
-
10µ
—
2.2n
-
15µ
—
1.0p
-
1n
1.0p
-
3.3n
3.9p
-
8.2n
4.7p
-
8.2n
10p
-
22n
27n
10p
-
33n
39n
-
47n
10p
-
33n
39n
-
56n
10p
-
47n
56n
-
68n
10p
-
120n
150n
-
180n
390p
-
270n
330n
680p
-
390n
470n
-
560n
100p
-
56n
100p
-
150n
330p
-
330n
100p
-
270n
150p
-
680n
—
220p
-
1.0µ
—
220p
-
1.0µ
—
330p
-
1.5µ
—
470p
-
3.3µ
—
1.0n
-
5.6µ
—
2.2n
-
10µ
—
1.0p
-
680p
1.0p
-
2.2n
3.9p
-
6.8n
4.7p
-
5.6n
10p
-
15n
18n
-
22n
10p
-
27n
33n
10p
-
22n
27n
-
39n
10p
-
33n
39n
-
47n
10p
-
82n
100n
-
120n
390p
-
180n
220n
-
270n
680p
-
270n
330n
-
470n
100p
-
10n
100p
-
47n
330p
-
120n
100p
-
120n
150p
-
330n
—
220p
-
560n
—
220p
-
560n
—
330p
-
820n
—
470p
-
1.0µ
—
1.0n
-
1.8µ
—
2.2n
-
3.3µ
—
—
100p
-
6.8n
100p
-
33n
330p
-
47n
100p
-
68n
150p
-
180n
—
220p
-
180n
—
220p
-
330n
—
330p
-
390n
—
470p
-
680n
—
1.0n
-
1.2µ
—
2.2n
-
2.2µ
—
—
100p
-
4.7n
100p
-
27n
330p
-
33n
100p
-
47n
150p
-
100n
—
220p
-
120n
—
220p
-
120n
—
330p
-
150n
—
470p
-
180n
—
1.0n
-
390n
—
2.2n
-
1.0µ
—
—
—
—
—
—
—
—
—
—
100p
-
15n
330p
-
10n
100p
-
10n
150p
-
33n
—
220p
-
68n
—
220p
-
82n
—
330p
-
100n
—
470p
-
150n
—
1.0n
-
220n
—
2.2n
-
470n
—
—
100p
-
10n
330p
-
6.8n
100p
-
6.8n
150p
-
22n
—
220p
-
47n
—
220p
-
47n
—
330p
-
68n
—
470p
-
100n
—
1.0n
-
150n
—
2.2n
-
330n
—
—
100p
-
2.2n
330p
-
4.7n
100p
-
4.7n
150p
-
10n
—
220p
-
10n
—
220p
-
27n
—
330p
-
33n
—
470p
-
47n
—
1.0n
-
82n
—
2.2n
-
150n
—
—
1.0p
-
100p
3.9p
-
220p
4.7p
-
270p
10p
-
820p
1.0n
10p
-
1.5n
1.8n
-
2.2n
10p
-
1.8n
2.2n
-
3.3n
10p
-
2.2n
2.7n
-
3.9n
10p
-
6.8n
8.2n
-
12n
390p
-
12n
15n
-
22n
680p
-
22n
27n
-
39n
—
—
1.0p
-
68p
3.9p
-
150p
4.7p
-
180p
10p
-
560p
680p
10p
-
1.2n
1.5n
10p
-
1.5n
1.8n
-
2.2n
10p
-
1.8n
2.2n
-
2.7n
10p
-
4.7n
5.6n
-
8.2n
390p
-
10n
12n
-
18n
680p
-
15n
18n
-
27n
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
100p
-
1.5n
150p
-
3.3n
—
220p
-
6.8n
—
220p
-
8.2n
—
330p
-
12n
—
470p
-
33n
—
1.0n
-
68n
—
2.2n
-
100n
—
—
—
—
—
—
—
—
100p
4.7p
100p
4.7p
100p
4.7p
100p
-
-
-
-
-
-
-
1.2n
120p*
1.0n*
68p*
680p*
47p*
390p*
150p
10p
150p
10p
150p
10p
150p
-
-
-
-
-
-
-
2.7n
270p*
2.2n*
180p*
1.2n*
120p*
1.0n*
—
330p
-
390p*
—
220p
-
270p*
—
150p
-
180p*
—
1812
1812
1812
T=3.2mm
(T=3.2mm)
General introduction
2
Definitions of Ultra-Stable and Stable
3
Dielectric characteristics
4
Capacitance, Impedance and E.S.R. vs Frequency
5
Ageing, capacitance measurements and tight tolerance capacitors
6
Production processes and reliability
7
FlexiCap™ overview
8
Testing and termination types
9
Documentation and compliance
10
IECQ-CECC and AEC-Q200 periodic tests
11
Handling notes
12
Soldering information
13
Chip dimensions
14-15
Product Selector
Ceramic Chip capacitors
Standard MLCC ranges - 10Vdc to 6kVdc - C0G/NP0 & X7R
X8R High Temperature capacitors
TCC/VCC range
High Q capacitors - MS range
Copper Barrier capacitors
Open Mode & Tandem capacitors
IECQ-CECC ranges
AEC-Q200 ranges
S02A Space grade ranges
Safety Certified capacitors
250Vac Non Safety Rated AC capacitors
115Vac 400Hz & DWV ranges
LCD Inverter chip range
Surface Mount EMI filters
E01 & E07 feedthrough capacitors
X2Y Integrated Passive Components
Packaging information - Ceramic chip capacitors
Radial Leaded capacitors
Packaging information - Radial leaded capacitors
16-18
19
20-21
22-23
24-25
26
27
28
29
30-32
33
34
35
36-37
38-39
40-41
42-47
48-49
1825
T=2.5mm
220p
10p
220p
10p
220p
10p
220p
-
-
-
-
-
-
-
3.9n
560p*
2.2n*
390p*
1.8n*
270p*
1.5n*
—
680p*
—
470p*
—
330p*
—
(T=2.5mm)
1825
1825
1825
T=3.2mm
(T=3.2mm)
2220
T=2.5mm
220p
10p
220p
10p
220p
10p
220p
-
-
-
-
-
-
-
6.8n
680p*
4.7n*
470p*
3.9n*
330p*
2.2n*
—
820p
-
1.2n*
—
560p
-
820p*
—
390p
-
560p*
—
(T=2.5mm)
2220
2220
2220
T=4.0mm
(T=4.0mm)
2225
T=2.5mm
330p
10p
330p
10p
330p
10p
330p
-
-
-
-
-
-
-
8.2n
820p*
5.6n*
560p*
4.7n*
390p*
2.7n*
—
470p
-
22n
—
1.0n
-
47n
—
2.2n
-
82n
—
1.0n
-
1.5n*
10p
-
1.8n
2.2n
-
3.3n
390p
-
4.7n
5.6n
-
6.8n
680p
-
8.2n
10n
-
15n
—
470p
-
6.8n
—
1.0n
-
15n
—
2.2n
-
33n
—
680p
-
1.0n*
10p
-
1.5n
1.8n
-
2.2n
390p
-
2.7n
3.3n
-
4.7n
680p
-
5.6n
6.8n
-
10n
—
470p
-
680p*
10p
-
1.0n
1.2n
-
1.5n
390p
-
1.8n
2.2n
-
3.3n
680p
-
3.9n
4.7n
-
6.8n
—
(T=2.5mm)
2225
2225
3640
3640
2225
T=4.0mm
(T=4.0mm)
3640
T=2.5mm
—
—
—
—
—
—
—
—
—
—
—
—
(T=2.5mm)
3640
T=4.0mm
—
—
—
—
—
—
—
—
—
—
—
1.0n
-
10n
—
2.2n
-
22n
—
—
(T=4.0mm)
5550
T=2.5mm
—
—
—
—
—
—
—
—
—
—
—
(T=2.5mm)
5550
5550
5550
T=4.0mm
—
Note: 0402, 0505, 1111 & 2211 case sizes
—
—
—
—
—
—
—
are available in our speciality ranges.
Please refer to the relevant sections of
this catalogue
—
more details.
—
for
—
—
—
—
—
—
—
—
(T=4.0mm)
8060
T=2.5mm
—
—
—
—
(T=2.5mm)
8060
8060
8060
T=4.0mm
—
—
—
—
—
—
—
—
—
—
—
(T=4.0mm)
10V
16V
25V
50/63V
100v
200/
250V
500V
630V
1kV
1.2kV
1.5kV
2kV
2.5kV
3kV
4kV
5kV
6kV
Definitions of Ultra-Stable and Stable
Technical Summary
Technical Summary
Dielectric characteristics
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 summarised below and
are also available in the relevant national and international specifications.
Technical Summary
C0G/NP0
Dielectric
characteristics
Ultra stable
1B/CG
-
-
-
C0G/
NP0
-
-
-
CG (BP)
X5R
Stable
-
X5R
-
-55ºC to +85ºC
2C1
-
BZ
X7R
Stable
2R1
X7R
-
-55ºC to +125ºC
2X1
-
BX
X8R
Stable
-
X8R
-
-55ºC to +150ºC
C0G/NP0
-
Ultra Stable Class 1 Ceramic (EIA Class 1)
Spec.
CECC
EIA
MIL
Classification
1B/CG
C0G/NP0
CG (BP)
Temperature
range °C
-55 +125
-55 +125
-55 +125
Maximum
capacitance change
@ rated DC volts
0 ± 30ppm/°C
0 ± 30ppm/°C
0 ± 30ppm/°C
Syfer
dielectric code
C
C
C
IECQ-
CECC
EIA
MIL
Rated temperature
range
Maximum capacitance
change over
temperature range
No DC voltage applied
Rated DC voltage applied
Syfer dielectric
ordering code
Capacitors within this class have a dielectric constant
range from 10 to 100. They are used in applications which
require ultra stable 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 ageing.
b) Capacitance and dissipation factor are not affected by
voltage.
c) Linear temperature coefficient.
-55ºC to +125ºC
0 ± 30 ppm/ºC
± 15%
-
± 20%
+20
-30%
± 15%
-
X
± 15%
+15
-25%
± 15%
-
N
X8R, X7R and X5R
- Stable Class II Ceramic (EIA Class II)
Temperature
range °C
-55 +125
-55 +125
-55 +125
-55 +150
-55 +125
-55 +85
-55 +125
-55 +125
C
Cr > 50pF ≤ 0.0015
Cr ≤ 50pF = 0.0015 (15 + 0.7)
Cr
P
R
B
Spec.
Classification
Maximum capacitance change %
over temperature range
No DC volt
applied
±20
±15
±15
±15
±15
±15
±15
±20
Rated DC Volt
+20 -30
-
-
+15 -25
-
-
-
-
-
-
Syfer
dielectric
code
R
X
B
N
X
P
B
R
Tangent of loss angle
(tan δ)
Insulation
resistance (Ri)
Time constant (Ri x
Cr) (whichever is the
least)
Capacitance
tolerance
≤ 0.025
≤ 0.025
≤ 0.025
CECC
2C1
2R1
2X1
X8R
X7R
X5R
BX
BZ
100G
Ω
or
1000s
100G
Ω
or
1000s
100G
Ω
or
1000s
100G
Ω
or
1000s
Cr < 10pF
EIA
MIL
+15 -25
+20 -30
Cr > 10pF
Capacitors of this type have a dielectric constant range
of 1000-4000, and also have a non-linear temperature
characteristic which exhibits a dielectric constant variation
of less than ±15% (2R1) from its room temperature value,
over the specified temperature range. Generally used for
by-passing (decoupling), coupling, filtering, frequency
discrimination, DC blocking and voltage transient suppression
with greater volumetric efficiency than Class l units, whilst
maintaining stability within defined limits.
Capacitance and dissipation factor are affected by:-
Time
(Ageing)
Voltage
(AC or DC)
Frequency
± 0.05pF (H)
± 0.10pF (B)
± 0.25pF (C)
± 0.50pF (D)
± 1.0pF (F)
± 1% (F)
± 2% (G)
± 5% (J)
± 10% (K)
± 5% (J)
± 10% (K)
± 20% (M)
± 5% (J)
± 10% (K)
± 20% (M)
± 5% (J)
± 10% (K)
± 20% (M)
Dielectric strength
<200V
>200V to <500V
500V to <1000V
500V to <1000V
>
1kV to
<1200V
>1200V
>1000V
Climatic
category (IEC)
Chip
Dipped
Discoidal
55/125/56
55/125/21
55/125/56
Zero
2.5 times
Rated voltage + 250V
1.5 times
-
1.25 times
1.2 times
-
Voltage applied for 5 seconds.
Charging current limited to 50mA maximum.
2.5 times
-
-
-
-
-
-
2.5 times
Rated voltage + 250V
-
1.5 times
-
-
1.2 times
2.5 times
-
-
-
-
-
-
Typical dielectric temperature characteristics
C0G/NP0 capacitance vs
temperature
% Capacitance Change
50
UPPER LIMIT
Power ratings
C0G/NP0 and X7R
X7R capacitance vs
temperature
20
15
10
5
0
-5
-10
-15
-20
-55
-35
-15
5
25
45
65
85
105
125
Typical capacitance change curves
will lie within the shown limits
55/85/56
-
-
<2% per time decade
55/125/56
55/125/21
55/125/56
<2% per time decade
55/150/56
-
-
<2% per time decade
∆C
ppm/°C
TYPICAL LIMIT
0
Power (mW)
25
Ageing
characteristic
(Typical)
-25
LOWER LIMIT
The table above highlights the difference in coding for IECQ-CECC, EIA
and MIL standards when defining the temperature coeffiecient and the
voltage coefficient.
-50
-55
-25
0
25
50
75
100
125
Temperature (°C)
Temperature (°C)
Operating Temperature (°C)
Approvals
Chip
Dipped radial
QC-32100
IECQ-CECC 30601-008
-
-
QC-32100
IECQ-CECC 30701-013
-
-
2
3
Capacitance, Impedance and E.S.R. vs Frequency
Technical Summary
Technical Summary
Ageing of ceramic capacitors
Impedance
vs Frequency - chips
Ultra Stable C0G/NP0 dielectric
Ultra Stable C0G/NP0 dielectric
100000000
ESR vs Frequency - chips
Ultra Stable C0G/NP0 dielectric
1000
10pF
1nF
100pF
Ageing
Capacitor ageing is a term used to describe the negative,
logarithmic capacitance change which takes place in ceramic
capacitors with time. The crystalline structure for barium
titanate based ceramics changes on passing through its Curie
temperature (known as the Curie Point) at about 125°C.
This domain structure relaxes with time and in doing so, the
dielectric constant reduces logarithmically; this is known as
the ageing mechanism of the dielectric constant. The more
stable dielectrics have the lowest ageing rates.
The ageing process is reversible and repeatable. Whenever
the capacitor is heated to a temperature above the Curie Point
the ageing process starts again from zero.
The ageing constant, or ageing rate, is defined as the
percentage loss of capacitance due to the ageing process of
the dielectric which occurs during a decade of time (a tenfold
increase in age) and is expressed as percent per logarithmic
decade of hours. As the law of decrease of capacitance is
logarithmic, this means that in a capacitor with an ageing rate
of 1% per decade of time, the capacitance will decrease at a
rate of:
a)
b)
c)
d)
e)
1% between 1 and 10 hours
An additional 1% between the following 10 and 100
hours
An additional 1% between the following 100 and 1000
hours
An additional 1% between the following 1000 and 10000
hours etc
The ageing rate continues in this manner throughout the
capacitor’s life.
Capacitance measurements
Because of ageing it is necessary to specify an age for
reference measurements at which the capacitance shall be
within the prescribed tolerance. This is fixed at 1000 hours,
since for practical purposes there is not much further loss of
capacitance after this time.
All capacitors shipped are within their specified tolerance at
the standard reference age of 1000 hours after having cooled
through their Curie temperature.
The ageing curve for any ceramic dielectric is a straight line
when plotted on semi-log paper.
Ultra Stable C0G/NP0 dielectric
Impedance (Ohms)
10000000
1000000
100000
10000
1000
100
10
1
0.1
0.01
0.001
0.01
0.1
1
10
ESR / Ohms
10nF
100
10
1
0.1
0.01
100pF
1nF
10nF
Capacitance vs time
(Ageing X7R @ 1% per decade)
100
1000
10000
Frequency (MHz)
0.001
0.001
0.01
0.1
1
10
100
1000
10000
Frequency (MHz)
Stable X7R dielectric
1000000
Stable X7R dielectric
Stable X7R dielectric
10000
Stable X7R dielectric
Impedance (Ohms)
100000
10000
1000
100
10
1
0.1
0.01
0.001
0.01
0.1
1
10
1nF
100nF
10nF
1000nF
1000
ESR (Ohms)
100
10
1
0.1
0.01
0.001
1nF
10nF
100nF
1µF
∆c
%
C0G/NP0
Typical values of the ageing constant for our Multilayer
Ceramic Capacitors are:
1
10
100
1000
10000
Age (Hours)
0.01
0.1
1
10
100
1000
10000
100
1000
10000
Frequency (MHz)
0.0001
0.001
Dielectric class
Ultra Stable C0G/NP0
Stable X7R
Typical values
Negligible capacitance loss
through ageing
<2 % per decade of time
Frequency (MHz)
Tight tolerance
One of the advantages of Syfer’s unique ‘wet process’ of
manufacture is the ability to offer capacitors with exceptionally
tight capacitance tolerances.
The accuracy of the printing screens used in the fully
automated, computer controlled manufacturing process allows
for tolerance as close as +/-1% on C0G/NP0 parts greater
than or equal to 10pF. For capacitance values below 10pF,
tolerances can be as tight as +/-0.05pF.
Impedance vs Frequency - 10nF chips
Stable X7R dielectric
Stable X7R dielectric 10nF
100000
Impedance (Ohms)
10000
1000
100
10
1
0.1
0.01
0.001
0.01
0.1
1
10
1808
1206
0805
1210
Impedance (Ohms)
100
1000
10000
Frequency (MHz)
Frequency (MHz)
4
5
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