Discoidal
Feed-thru Capacitors
Ceramic discoidal feed-thru capacitors are the building
blocks of the EMI filter industry. Spectrum Control
Technology Inc. discoidal capacitors provide great
versatility in meeting varied voltage, capacitance and
dimensional requirements. Our non-poplar, multi-layered
capacitors are small, reliable and high in dielectric
strength. Operational temperatures of -55°C
to +125°C are achieved with no voltage derating.
The versatile nature of our discoidals makes them
ideally suited for by-pass, filtering and coupling. These
capacitors perform extremely well in high frequency
applications due to their low inductance construction.
The low profile and rugged design of our discoidal
capacitors offer an excellent alternative to ceramic tubes.
Multilayer
Discoidal
O.D.
Features
s
s
s
s
s
s
Ceramic
dielectric
Electrodes
I.D.
Dielectric
thickness
Overlap
area
Discoidal capacitor
Excellent high frequency performance
Low profile design
Rugged construction
Low inductance, non-polar
AC applications up to 240V
-55°C to +125°C operation
Electrical Specifications
Capacitance
. . . . . . NPO, BX, X7R 1 volt RMS 1 KHz
. . . . . . . . . . . . . .
Z5U
.5 volt RMS 1 KHz
Dissipation Factor
. . NPO .15% max. @ 1 volt RMS
. . . . . . . . . . . . . .
X7R 3.5% max. @ 1 volt RMS
. . . . . . . . . . . . . .
BX 2.5% max. @ 1 volt RMS
. . . . . . . . . . . . . .
Z5U 3.5% max. @ 1 volt RMS
Dielectric
Withstanding
Voltage
. . . . . . . . . . 250% of rated voltage, 5 seconds,
. . . . . . . . . . . . . .
charging current 30-50 milliamperes
Insulation
Resistance
. . . . . . . 25°C - 1000 meg ohm microfarad or
. . . . . . . . . . . . . .
100,000 meg ohm, whichever is less.
. . . . . . . . . . . . . .
125°C - 100 meg ohm microfarad or
. . . . . . . . . . . . . .
10,000 meg ohm, whichever is less.
Operating
Temperature
. . . . . . -55°C to +125°C
Temperature
Characteristics
. . . . NPO ± 30 ppm/°C
..............
over temperature range
. . . . . . . . . . . . . .
X7R ± 15% from
..............
-55°C +125°C
. . . . . . . . . . . . . .
BX meets MIL-C-39014
. . . . . . . . . . . . . .
Z5U +22%, -56% from
..............
+10°C to +85°C
Insertion Loss
Insertion Loss (db)
Per MIL-STD-220
70
Curve
1
2
3
4
5
6
60
7
50
8
1.
4u
F
56
40
uF
1u
F
9
02
7u
056
uF
F
27
5
00
00
01u
pF
pF
0pF
F
20
27
30
uF
10
10
0
0
01
01
1
10
10
00
100
1000
Frequency (MHz)
Metallization
Standard metallization is solderable silver.
Other metallizations are available on request.
36
SPECTRUM CONTROL INC.
• 8031 Avonia Rd. • Fairview, PA 16415 • Phone: 814-835-1650 • Fax: 814-835-1651 • Web site: www.spectrumcontrol.com
SPECTRUM CONTROL GmbH
• Hansastrasse 6 • 91126 Schwabach, Germany • Phone: (49)-9122-795-0 • Fax: (49)-9122-795-58
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