SM015A100JAN120 Datasheet, PDF (71/112 Pages) AVX Corporation – AVX Advanced Ceramic Capacitors for Power Supply, High Voltage and Tip and Ring Applications

General Description
Table 1: EIA and MIL Temperature Stable and General
Application Codes
EIA CODE
Percent Capacity Change Over Temperature Range
RS198
Temperature Range
X7
-55°C to +125°C
X5
-55°C to +85°C
Y5
-30°C to +85°C
Z5
+10°C to +85°C
Code
Percent Capacity Change
D
±3.3%
E
±4.7%
F
±7.5%
P
±10%
R
±15%
S
±22%
T
+22%, -33%
U
+22%, - 56%
V
+22%, -82%
EXAMPLE – A capacitor is desired with the capacitance value at 25°C
to increase no more than 7.5% or decrease no more than 7.5% from
-30°C to +85°C. EIA Code will be Y5F.
MIL CODE
Symbol
Temperature Range
A
B
C
Symbol
-55°C to +85°C
-55°C to +125°C
-55°C to +150°C
Cap. Change
Zero Volts
Cap. Change
Rated Volts
Q
+15%, -15%
+15%, -50%
R
+15%, -15%
+15%, -40%
W
+22%, -56%
+22%, -66%
X
+15%, -15%
+15%, -25%
Y
+30%, -70%
+30%, -80%
Z
+20%, -20%
+20%, -30%
Temperature characteristic is specified by combining range and change
symbols, for example BR or AW. Specification slash sheets indicate the
characteristic applicable to a given style of capacitor.
In specifying capacitance change with temperature for Class
2 materials, EIA expresses the capacitance change over an
operating temperature range by a 3 symbol code. The
first symbol represents the cold temperature end of the
temperature range, the second represents the upper limit of
the operating temperature range and the third symbol repre-
sents the capacitance change allowed over the operating
temperature range. Table 1 provides a detailed explanation of
the EIA system.
Effects of Voltage – Variations in voltage have little effect
on Class 1 dielectric but does affect the capacitance and
dissipation factor of Class 2 dielectrics. The application of
DC voltage reduces both the capacitance and dissipation
factor while the application of an AC voltage within a
reasonable range tends to increase both capacitance and
dissipation factor readings. If a high enough AC voltage is
applied, eventually it will reduce capacitance just as a DC
voltage will. Figure 2 shows the effects of AC voltage.
Cap. Change vs. A.C. Volts
X7R
50
40
30
20
10
0
12.5
25
37.5
50
Volts AC at 1.0 KHz
Figure 2
Capacitor specifications specify the AC voltage at which to
measure (normally 0.5 or 1 VAC) and application of the
wrong voltage can cause spurious readings.
Typical Cap. Change vs. Temperature
X7R
+20
+10
0VDC
0
-10
-20
-30
-55 -35 -15 +5 +25 +45 +65 +85 +105 +125
Temperature Degrees Centigrade
Figure 3
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