Discoidal Features
- Excellent high frequency performance
- Low profile design
- Rugged construction
- Low impedance, many paths to ground
- Low inductance, non-polar
- AC applications up to 240V
- DC applications up to 500V
- -55°C to +125°C operation
Ceramic discoidal feed-thru capacitors are the building blocks of the EMI filter industry. Spectrum Control discoidal capacitors provide great versatility in meeting varied voltage, capacitance and dimensional requirements. Our non-polar, multi-layer capacitors are small, reliable and high in dielectric strength. Operational temperatures of –55°C to +125°C are achieved with no voltage de-rating.
The versatile nature of our discoidals makes them ideally suited for by-pass and filtering applications. Due to their low inductance construction, these capacitors perform extremely well in high frequency applications. The circular geometry of a discoidal feed-thru capacitor offers many paths to ground, resulting in lower impedance and better filtering performance.
The low profile and rugged design of our discoidal capacitors offer an excellent alternative to ceramic tubes.
Specialty Ceramic Capacitors
We offer many variations of discoidal and array capacitors to fit your custom application:
- Various OD, ID and thickness configurations
- Pressed discoidals with surface printed terminals
- Multi-hole discoidal designs
- Miniature discoidals down to .080" OD
- Arrays
- Custom style capability
- High voltage designs available
- High temperature designs available
|
Multilayer Discoidal
|
Discoidal Electrical Testing
| Electrical Parameter |
Test Method |
Temperature Coefficient |
| NP0 |
X7R |
Z5U |
| Temperature Coefficient |
EIA 198 |
±30 ppm/°C,
-55 to +125°C |
±15%,
-55 to +125°C |
+22, -56%,
+10 to +85°C |
Capacitance
Tolerance |
EIA Tolerance Code |
K, M, P |
K, M, P |
M, P, Z |
Capacitance Test
@ 25°C |
MIL-STD-202,
Method 305 |
Cap = 100 pF: 1 MHz, 1 Vrms
Cap > 100 pF: 1 KHz, 1 Vrms |
1 KHz, 1 Vrms |
1 KHz, 0.5 Vrms |
Dissipation Factor
@ 25°C |
MIL-STD-202,
Method 305 |
0.15% Max |
3.5% Max |
3.5% Max |
Aging Rate
(Per Decade) |
|
0% |
<2.0% |
<3.5% |
Insulation
Resistance
@ 25°C |
MIL-STD-202,
Method 302 |
1000 MO · µF
or 100 KMO,
whichever is less |
1000 MO · µF
or 100 KMO,
whichever is less |
1000 MO · µF
or 100 KMO,
whichever is less |
Insulation
Resistance
@ 125°C |
MIL-STD-202,
Method 302 |
100 MO · µF
or 10 KMO,
whichever is less |
100 MO · µF
or 10 KMO,
whichever is less |
100 MO · µF
or 10 KMO,
whichever is less |
Dielectric
Withstanding
Voltage |
MIL-STD-202,
Method 301 |
250% of Rated Voltage,
5 second hold,
30-50 mA |
250% of Rated Voltage,
5 second hold,
30-50 mA |
250% of Rated Voltage,
5 second hold,
30-50 mA |
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