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C315C479F1G5CA Datasheet

  • C315C479F1G5CA

  • MULTILAYER CERAMIC CAPACITORS/AXIAL & RADIAL LEADED

  • 11頁(yè)

  • KEMET   KEMET

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MULTILAYER CERAMIC CAPACITORS/AXIAL & RADIAL LEADED
Multilayer ceramic capacitors are available in a
variety of physical sizes and configurations, including
leaded devices and surface mounted chips. Leaded
styles include molded and conformally coated parts
with axial and radial leads. However, the basic
capacitor element is similar for all styles. It is called a
chip and consists of formulated dielectric materials
which have been cast into thin layers, interspersed
with metal electrodes alternately exposed on opposite
edges of the laminated structure. The entire structure is
fired at high temperature to produce a monolithic
block which provides high capacitance values in a
small physical volume. After firing, conductive
terminations are applied to opposite ends of the chip to
make contact with the exposed electrodes.
Termination materials and methods vary depending on
the intended use.
TEMPERATURE CHARACTERISTICS
Class III:
General purpose capacitors, suitable
Ceramic dielectric materials can be formulated with
a wide range of characteristics. The EIA standard for
for by-pass coupling or other applications in which
ceramic dielectric capacitors (RS-198) divides ceramic
dielectric losses, high insulation resistance and
dielectrics into the following classes:
stability of capacitance characteristics are of little or
no importance. Class III capacitors are similar to Class
II capacitors except for temperature characteristics,
Class I:
Temperature compensating capacitors,
which are greater than 鹵 15%. Class III capacitors
suitable for resonant circuit application or other appli-
have the highest volumetric efficiency and poorest
cations where high Q and stability of capacitance char-
stability of any type.
acteristics are required. Class I capacitors have
predictable temperature coefficients and are not
effected by voltage, frequency or time. They are made
KEMET leaded ceramic capacitors are offered in
from materials which are not ferro-electric, yielding
the three most popular temperature characteristics:
superior stability but low volumetric efficiency. Class I
C0G:
Class I, with a temperature coefficient of 0 鹵
capacitors are the most stable type available, but have
30 ppm per degree C over an operating
the lowest volumetric efficiency.
temperature range of - 55擄C to + 125擄C (Also
known as 鈥淣P0鈥?.
X7R:
Class II, with a maximum capacitance
Class II:
Stable capacitors, suitable for bypass
change of 鹵 15% over an operating temperature
or coupling applications or frequency discriminating
range of - 55擄C to + 125擄C.
circuits where Q and stability of capacitance char-
Z5U:
Class III, with a maximum capacitance
acteristics are not of major importance. Class II
change of + 22% - 56% over an operating tem-
capacitors have temperature characteristics of 鹵 15%
perature range of + 10擄C to + 85擄C.
or less. They are made from materials which are
ferro-electric, yielding higher volumetric efficiency but
less stability. Class II capacitors are affected by
Specified electrical limits for these three temperature
temperature, voltage, frequency and time.
characteristics are shown in Table 1.
SPECIFIED ELECTRICAL LIMITS
PARAMETER
Dissipation Factor: Measured at following conditions:
C0G 鈥?1 kHz and 1 vrms if capacitance > 1000 pF
1 MHz and 1 vrms if capacitance
鈮?/div>
1000 pF
X7R 鈥?1 kHz and 1 vrms* or if extended cap range 0.5 vrms
Z5U 鈥?1 kHz and 0.5 vrms
Dielectric Strength: 2.5 times rated DC voltage.
Insulation Resistance (IR): At rated DC voltage,
whichever of the two is smaller
Temperature Characteristics: Range, 擄C
Capacitance Change without
DC voltage
* 1 MHz and 1 vrms if capacitance
鈮?/div>
100 pF on military product.
TEMPERATURE CHARACTERISTICS
C0G
X7R
Z5U
0.15%
2.5%
4.0%
Pass Subsequent IR Test
1,000 M鈩?碌F
or 100 G鈩?/div>
-55 to +125
0 鹵 30 ppm/擄C
1,000 M鈩?碌F
or 100 G鈩?/div>
-55 to +125
鹵15%
1,000 M鈩?碌F
or 10 G鈩?/div>
+10 to +85
+22%, -56%
Table I
漏 KEMET Electronics Corporation, P.O. Box 5928, Greenville, S.C. 29606, (864) 963-6300
3
Multlayer Ceramic
Capacitors

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