| Image | Part Number | Description / PDF | Quantity | Rfq |
|---|---|---|---|---|
 |
TubeDepot |
SILVER MICA 68PF / 500V |
147 |
|
 |
Cornell Dubilier Electronics |
CAP MICA 330PF 100V RADIAL |
0 |
|
 |
Cornell Dubilier Electronics |
CAP MICA 430PF 2% 500V 1812 |
0 |
|
 |
Cornell Dubilier Electronics |
CAP MICA 6PF 0.25PF 500V 1210 |
0 |
|
 |
Cornell Dubilier Electronics |
CAP MICA 50PF 5% 500V RADIAL |
183400 |
|
 |
Cornell Dubilier Electronics |
CAP MICA 150PF 1% 500V RADIAL |
0 |
|
 |
Cornell Dubilier Electronics |
CAP MICA 120PF 2% 500V 1210 |
0 |
|
 |
Cornell Dubilier Electronics |
CAP MICA 330PF 50V RADIAL |
0 |
|
 |
Cornell Dubilier Electronics |
CAP MICA 10000PF 1% 100V RADIAL |
0 |
|
 |
Cornell Dubilier Electronics |
CAP MICA 470PF 5% 500V RADIAL |
193400 |
|
 |
Cornell Dubilier Electronics |
CAP MICA 36PF 5% 500V RADIAL |
0 |
|
 |
Cornell Dubilier Electronics |
CAP MICA 240PF 500V RADIAL |
0 |
|
 |
Cornell Dubilier Electronics |
CAP MICA 11PF 5% 300V SMD |
0 |
|
 |
Cornell Dubilier Electronics |
CAP MICA 75000PF 100V RADIAL |
0 |
|
 |
Cornell Dubilier Electronics |
CAP MICA 500V |
0 |
|
 |
Cornell Dubilier Electronics |
CAP MICA 420PF 5% 1KV RADIAL |
0 |
|
 |
Cornell Dubilier Electronics |
CAP MICA 360PF 500V RADIAL |
0 |
|
 |
Cornell Dubilier Electronics |
CAP MICA 91PF 300V RADIAL |
0 |
|
 |
Cornell Dubilier Electronics |
CAP MICA 43PF 500V RADIAL |
0 |
|
 |
Cornell Dubilier Electronics |
CAP MICA 430PF 1% 500V RADIAL |
0 |
|
Mica and PTFE (Polytetrafluoroethylene) capacitors are specialized electronic components utilizing mica or PTFE as dielectric materials. Known for exceptional stability, low loss, and high-temperature resistance, they are critical in precision and high-frequency applications. Mica capacitors leverage natural mineral sheets for superior electrical properties, while PTFE capacitors offer excellent chemical resistance and thermal stability up to 200 C.
| Type | Functional Characteristics | Application Examples |
|---|---|---|
| Mica Capacitors | High Q factor, low leakage current, stable over temperature/humidity | RF tuning circuits, military-grade oscillators |
| PTFE Film Capacitors | Self-healing properties, high dielectric strength, low moisture absorption | High-frequency power supplies, medical imaging equipment |
| High-Voltage PTFE Capacitors | Rated >1kV, arc-resistant design | Laser power systems, aerospace ignition modules |
Mica Capacitors: Constructed by sandwiching mica sheets between vacuum-deposited aluminum electrodes. Encapsulated in ceramic or plastic shells with epoxy sealing. PTFE Capacitors: Made by winding PTFE film with metallized electrodes or using stacked foil structures. Terminations use silver epoxy or welded leads for low resistance.
| Parameter | Typical Values | Importance |
|---|---|---|
| Capacitance Range | 1pF-10 F (Mica), 100pF-4.7 F (PTFE) | Determines frequency response and filtering capability |
| Voltage Rating | 50V-10kV | Defines operational safety margin |
| Temperature Coefficient | 5-100ppm/ C | Stability in varying thermal conditions |
| Dissipation Factor | 0.0001-0.002 | Energy loss efficiency |
| Operating Temperature | -55 C to +200 C | Environmental durability |
Key industries: Telecommunications (RF amplifiers), Aerospace (avionics filters), Medical (MRI gradient coils), Industrial (precision test equipment). Example: 1000V-rated PTFE capacitors in MRI machine deflection coil drivers.
| Manufacturer | Product Series | Key Specifications |
|---|---|---|
| Murata Manufacturing | NME3 Series | 0.1-10nF, 500V, 30ppm/ C |
| KEMET | C8AK Series | 100pF-4.7nF, 1kV, -55 C to +150 C |
| Vishay Beyschlag | MKP385 Series | 1nF-1 F, self-healing, 200 C rating |
Consider: 1) Required capacitance tolerance (< 1% for critical filters), 2) Voltage derating (use 80% of rating), 3) Temperature extremes (select >20% margin), 4) Mechanical stress (radial vs axial leads), 5) Cost vs lifetime (mica preferred for >10 year deployments).
Emerging trends: Miniaturization for 5G mmWave circuits, hybrid mica-PTFE composites for improved thermal management, and increased adoption in EV charging systems (1500V PTFE capacitors). Market growth projected at 7.2% CAGR (2023-2030) per Grand View Research.