Sharma Mica Capacitors
Page 1
Quick Reference
Series
DM05
DM10
DM12
DM15
DM19
DM20
DM30
DM42
Features
Lead Spacing: 3.05 +/-0.8 mm
Lead Spacing: 3.57 +/-0.8 mm
Lead Spacing: 5.00 +/-0.8 mm
Lead Spacing: 5.95 +/-0.8 mm
Lead Spacing: 8.73 +/-0.8 mm
Lead Spacing: 11.11 +/-0.8 mm
Lead Spacing: 11.11 +/-0.8 mm High Capacitance
Lead Spacing: 26.99 +/-0.8 mm High Capacitance
Packaging Specifications
Page
7
9
10
11
13
15
17
17
18
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Sharma Mica Capacitors
Page 2
MICA
CAPACITORS
Quick Reference Guide
DM Series General Specifications by Case Size
SHARMA
DESIGNATION
MIL STYLE - Discontinued
DM 05
-
1 to 390
390
200
120
-
-
0.270
0.250
0.190
0.120
6.86
6.35
4.83
3.05
DM 10
CM 04
1 to 390
820
390
360
250
-
0.390
0.380
0.220
0.141
9.91
9.65
5.59
3.58
DM 12
-
1 to 2500
-
2500
820
430
-
0.413
0.433
0.220
0.200
10.49
11.00
5.59
5.08
DM 15
CM 05
1 to 1200
2500
2000
2000
750
330
-
430
0.490
0.420
0.240
0.234
12.45
10.67
6.10
5.94
CAPACITANCE RANGE pF
50 V DC
100 V DC
IN pF IN THE
300 V DC
RATED
500 V DC
VOLTAGE
1000 V DC*
MAXIMUM
CAPACITANCE
INDICATED
MAXIMUM
NOMINAL
DIMENSIONS IN
INCHES
MAXIMUM
NOMINAL
DIMENSIONS IN
mm
L
W
T
B
L
W
T
B
SHARMA
DESIGNATION
MIL STYLE - Discontinued
MAXIMUM
CAPACITANCE
IN pF IN THE
RATED
VOLTAGE
DM 19
CM 06
1 to 8200
-
8200
6800
5100
4700
0.710
0.590
0.370
0.344
18.03
14.99
9.40
8.74
DM 20
-
680 to 12,000
-
12000
12000
10000
-
0.820
0.630
0.450
0.438
20.83
16.00
11.43
11.13
DM 30
CM 07
DM 42
-
CAPACITANCE RANGE pF
50 V DC
100 V DC
300 V DC
500 V DC
1000 V DC*
L
W
T
B
L
W
T
B
5100 to 20,000 16000 to 82000
-
-
-
82000
20000
68000
20000
51000
12000
30000
0.830
0.920
0.450
0.438
21.08
23.37
11.43
11.13
1.470
0.920
0.450
1.063
37.34
23.37
11.43
27.00
INDICATED
MAXIMUM
NOMINAL
DIMENSIONS IN
INCHES
MAXIMUM
NOMINAL
DIMENSIONS IN
mm
* Available as special part.
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Sharma Mica Capacitors
MICA CAPACITOR -
D
Series
Enter Series Code: (up to 4 Characters)
Series included: DM05, DM10, DM12, DM15,
DM19, DM20, DM30, DM42.
Page 3
PART NUMBERING SYSTEM
M
1
5
F
D
1
5
1
J
O
3
-
RH T
R
0
2
Sample Part Number: DM15FD151JO3 Description: DM15 Series, 150pF,
500
Volt, 5%,
RoHS Compliant, Tape & Reel, Inside Crimped
Characteristic
Enter characteristic code: ( 1 Character)
Temperature
Characteristic
Letter
C
D
E
F
Coefficient
PPM/C
-200 to +200
-100 to +100
-20 to +100
0 to +70
Capacitance
Drift
± (0.5% + 0.1pF)
± (0.3% + 0.1pF)
± (0.1% + 0.1pF)
± (0.05% + 0.1pF)
see catalog for individual part characteristic code
Rated Voltage
Enter voltage code: (1 character)
Rated Voltage Code
Letter Code
Volts DCW
Y
A
C
50
100
300
Rated Voltage Code
Letter Code
Volts DCW
E
D
F*
350
500
1000*
* Note: Not for use in snubber applications
Capacitance
Enter EIA Capacitance Code: (3 Digits)
First Two Digits represents significant figures of capacitance in Picofarads.
Third Digit indicates number of zeros to follow.
Example: 10pF = 100, 100pF = 101, 1000pF = 102
Tolerance
Enter Capacitance Tolerance Code: ( 1 Character)
Tolerance Code
D
E
F
G
± 0.5pF
± 0.5 %
±1 %
±2 %
H
J
K
±3 %
±5 %
± 10 %
Temperature Range
Code O = -55 to +125 C
Vibration Grade
Standard Grade = 3
(see catalog for details)
Marking
RH= RoHS Compliant; S for Standard non- RoHS Compliant parts
Package Type
Bulk
Ammo Pack
Tape & Reel
< Blank >
A
T
Special Specifications
C
R
P
Examples:
Cut
Crimped
Cut & Crimped
followed by 2 Digit specification code 01 -99
followed by 2 Digit specification code 01 -99
followed by 2 Digit specification code 01 -99
P 0 2 = cut leads to 0.175 mm and inside crimp
Rev D - 2/99
C 0 2 = cut leads to 0.175 mm
(See Special Specifications Sheet)
Part Marking
150 ± 5%
500V
SAHA
TYPE 1- Capacitance in pF,
tolerance in percentage or +/-
CM 05 FD
pF and voltage(Vdc) are indi-
151JO3
cated in numbers along with
SAHA
the brand marking. Brand
marking of “SAHA”, “SH”,
"SM",“KEC”
are common. Parts are
also supplied with no brand
marking in some cases based
TYPE 2
on product availability and
customer requirements.
TYPE 2 - Formerly for
Military certified Capacitors.
The CM series code has
been discontinued.
151J
or
150 pF
+/- 5%
TYPE 3 - Capacitance in
EIA capacitance code
(as in Type 2) and toler-
ance with tolerance code
or capacitance value in
pF with tolerance in +/-
% or +/- pF are marked
on
the
capacitors.
Voltage is not marked on
the part. Brand marking
is optional.
TYPE 1
TYPE 3
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Sharma Mica Capacitors
PERFORMANCE CHARACTERISTICS
FIGURE 1
GENERAL SPECIFICATIONS FOR
SHARMA
MICA CAPACITORS
The
SHARMA
Mica capacitors meet the required commercial specifications and theEIA
requirements. The CMO series capacitors also meet the military specifications MIL-C-5. The
actual specifications and dimensions of the capacitors are mentioned under each series in
the catalog.
CAPACITANCE
The capacitance of mica capacitors is measured at 1 M Hz ±10% for capacitance values up
to 1000 pF and at 1 K Hz ±10% for capacitance values above 1000 pF. The capacitance
value when measured at 25 °C shall be with in the tolerance specified.
DISSIPATION FACTOR
The dissipation factor for mica capacitors are measured at 1MHz for values up to 1000 pF
and at 1 KHz for values above 1000 pF. The values shall remain within the specified values.
The variation pattern of dissipation factor for different values of capacitance are also shown
in the Figure 3.
INSULATION RESISTANCE
The insulation resistance is measured at 50 ±5 V for capacitors with rated voltage of 50 V
DC and at 100 ±10 V for capacitors with higher voltage rating. The insulation resistance thus
measured at 25 °C shall meet the specified limits. The variation of insulation resistance for
different capacitance values at 25 °C is shown in Figure 1. After certain tests listed below
the insulation resistance value changes and these values are plotted in Figure 2. Figure 4
indicates the variation pattern of insulation resistance with capacitance value at different
temperature conditions.
WITHSTANDING VOLTAGE
The mica capacitors are designed to withstand higher voltage than the rated voltage for
limited time. These capacitors shall withstand 200% of the rated voltage for 1 to 5 seconds
when applied with a limiting surge current value of 50 mA.
VIBRATION GRADE
The capacitors shall be subjected to a harmonic motion having an amplitude of 1.5 mm and
the frequency which is varied between the limits of 10 and 55 Hz. The entire frequency
range from 10 to 55 Hz and then back to 10 Hz shall be traversed in approximately 1 minute
and the motion shall be applied for a period of 1hour in each of the three mutually
perpendicular directions. After testing, when the electrical measurements are performed:
1. The insulation resistance shall be more than 30000 M Ohms for capacitance value up to
10000 pF. Please refer to Figure 2 for acceptable variation pattern for Insulation
Resistance for values above 10000 pF.
2. The dissipation factor shall be within the original specified limits. Please also refer to
Figure 3 for variation pattern of dissipation factor with respect to capacitance value.
3. The capacitance change shall not exceed ±1% or ±1 pF whichever is greater.
SOLDERING HEAT RESISTANCE
Both leads of the capacitors shall be immersed in molten solder at a temperature of 270
°C for 3 to 4 seconds. After the test the capacitors shall meet the initial requirements of the
Withstanding voltage and the Capacitance change shall not exceed ± 0.55 or ± 1 pF.
MOISTURE RESISTANCE
Capacitors shall be subjected to a temperature of 40 ±2 °C at 90 to 95 % relative humidity
for 240 ±8 Hours. After the test:
1. The samples shall meet the after test requirement of Insulation resistance values as
furnished in Figure 2.
2. The dissipation factor shall be within 1.5 times the original specified limits. Please also
refer to Figure 3 for variation pattern of dissipation factor with respect to capacitance
value for original limits.
3. The capacitance change shall not exceed ±3% or ±1 pF whichever is greater.
MOISTURE RESISTANCE LOADING
Capacitors shall be subjected to a temperature of 40±2 °C at 90 to 95% relative humidity
with rated voltage for 500 Hours. After the test the samples are maintained at normal
temperature and relative humidity for a period of 4 to 24 hours. When tested after this;
1. The capacitor samples shall be free of cracks, or other mechanical damages and the
marking shall remain legible
2. The samples shall meet the original requirement of the Withstanding voltage
3. The samples shall meet the after test requirement of Insulation resistance as furnished in
Figure 2
4. The dissipation factor shall be within 2 times the original limits
5. The capacitance change shall not exceed ±5% or ±1 pF
FIGURE 3
FIGURE 2
Page 4
FIGURE 4
FIGURE 5
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Sharma Mica Capacitors
MOISTURE RESISTANCE LOADING
Capacitors shall be subjected to a temperature of 40±2 °C at 90 to 95% relative humidity
with rated voltage for 500 Hours. After the test the samples are maintained at normal
temperature and relative humidity for a period of 4 to 24 hours. When tested after this;
1. The capacitor samples shall be free of cracks, or other mechanical damages and the
marking shall remain legible
2. The samples shall meet the original requirement of the Withstanding voltage
3. The samples shall meet the after test requirement of Insulation resistance as furnished in
Figure 2
4. The dissipation factor shall be within 2 times the original limits
5. The capacitance change shall not exceed ±5% or ±1 pF
LIFE TEST
The capacitor samples shall be subjected to a temperature of 125 °C with 150% of rated
voltage for 2000 hours.
After the test :
1. The capacitor samples shall be free of cracks, or other mechanical damages and the
marking shall remain legible
2. The samples shall meet the original requirement of the
Withstanding voltage
3. The samples shall meet the original requirements of Insulation resistance as furnished in
Figure 1.
4. The dissipation factor shall be within 1.5 times the original limits
5. The capacitance change shall not exceed ±3% or ±1 pF(whichever is greater) for
characteristic "C" and ±2.5 ±1pF (whichever is greater) for characteristic D, E and F.)
OTHER TYPICAL VARIATION PATTERNS
Some typical variation patterns for selected values during heat resistance load life test and
moisture proof load life tests as listed below are illustrated in Figures 8 through 10.
1. Insulation resistance Vs. time for heat resistance load life test and moisture proof load life
tests (Figure 8).
2. Capacitance change in percentage Vs. time (Figure 9).
3. Dissipation factor Vs. time (Figure 10).
Other variation patterns and characteristic for selected values as listed below are furnished
as Figures 11 through 14
1. Capacitance change Vs. frequency (Figure 11)
2. Capacitance change Vs. time(Figure 12)
3. Dissipation factor change Vs. frequency(Figure 13)
4. Insulation resistance Vs. temperature (Figure 14)
FIGURE 8
FIGURE 6
Page 5
FIGURE 7
FIGURE 9
FIGURE 10
FIGURE 11
FIGURE 12
FIGURE 13
FIGURE 14
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