High Voltage
Disc Ceramic Capacitor
D Series
FEATURES
Disc ceramic capacitors made under strict quality control proce-
dures are a reliable component. Special attention is given to the
ceramic pressing operation to assure high and uniform ceramic
density.
These parts are manufactured for the quality conscious customer.
Parts are available screened to MIL-PRF-49467 established relia-
bility specification.
CAPACITOR OUTLINE DRAWING
INSTALLATION
Higher-voltage parts may require further encapsulation to prevent surface breakdown. Parts should be cleaned and oven dried
at 85°C before further encapsulation. Silicone rubbers or an epoxy may be used. De-airing of encapsulants is recommended.
We recommend that a heat sink be attached to the lead between the soldering iron and the capacitor during installation sol-
dering. Testing of higher-voltage parts before encapsulation may be done in a suitable dielectric fluid such as Freon.
DIELECTRIC COMPARISON
CERAMIC TYPE
Dissipation Factor
Temperature Coefficient
Voltage Coefficient
Dielectric Withstanding
Voltage Test
Insulation Resistance
(25ºC)
Operating Temperature
Range (rated voltage)
Thickness:
Inches (mm) max.
3kV
5kV
7.5kV
10kV
15kV
20kV
30kV
40kV
50kV
=
=
=
=
=
=
=
=
=
C0G (NP0)
0.1%
±30ppm/ºC
0
3 to 15kV at 1.5x rated,
20 to 50kV at rated +10kV
100k megohms or
1k megohms-μF,
whichever is less
-55ºC to +125ºC
0.15
0.20
0.28
0.35
0.45
0.55
0.95
1.20
1.50
(3.81)
(5.08)
(7.11)
(8.89)
(11.43)
(13.97)
(24.13)
(30.48)
(38.10)
X7R
2.5%
±15%
-20%
3 to 15kV at 1.5x rated,
20 to 50kV at rated +10kV
100k megohms or
1k megohms-μF,
whichever is less
-55ºC to +125ºC
X5U
2.5%
+22% -56%
N/A
3 to 15kV at 1.5x rated,
20 to 50kV at rated +10kV
10k megohms or
100 megohms-μF,
whichever is less
-55ºC to +85ºC
Lead Type:
Solder plated, copper-clad steel (CCFE)-
D30, D40: 0.025” (22GA)
D50 & Larger: 0.032” (20GA)
PART NUMBER AND ORDERING INFORMATION
30
Voltage
30 =3000V
100 =10,000V
etc.
D50
W
122
M
M
Q
No Leads
Add to part number if required
Group A Screening*
Add to part number if required
*MIL-PRF-49467 (subgroup 1)
except Corona
Style
D50, etc.
Dielectric
N = C0G (NP0)
W = X7R
Y = X5U
Tolerance
MARKING
(D30)
301M
3kV
KEC
Date Code
(All Other Sizes)
D50W122M
3kV
KEC
Date Code
J = ±5% C0G (NP0)
K = ±10%
M = ±20%
P = 0/+100%
Z = -20%/+80%
Capacitance Value
First two digits are significant,
last digit is number of zeroes,
i.e., 472=4700pF
© KEMET Electronics Corporation • PO Box 5928 • Greenville, SC 29606 • www.kemet.com
49
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